THE GENUS CORINNA (ARANEAE, CLUBIONIDAE) IN PANAMA

paratypes. irregular

Holotyle. The i:emale holotype is rom Barro Colorado Island, Panama Canal Zone, July 7, 1936. The name ox the species is an arbitrary combination o letters.
Description. Total length, including extended chelicerae and spinnerets, nearly 12 ram. Carapace nearly 4.8 mm long, nearly 4.18 mm wide opposite second coxae where it is widest; nearly 1.78 mm tall; gently arched i:rom PNIE to just above anterior end ox well exposed median thoracic groove; with descent rom that region to posterior border; union of thoracic and cephalic regions well marked.
Eyes: eight in two rows as usual in the genus; viewed rom above, posterior row gently procurved and anterior row nearly straight; viewed from in ront, anterior row gently procurved. Central ocular quadrangle only slightly wider in ront than behind and only slightly wider in ront than long. Ratio o eyes AME _ALE PME :PLE ram. Carapace nearly 5.2 mm long; nearly 3.9 mm wide opposite second coxae where it is widest; nearly x.69 mm tall; arched rom PME to beginning o gradually sloping posterior declivity opposite interval between second and third coxae; with a well defined median thoracic groove; with cephalic region considerably raised. Eyes: eight in two rows as usual in the genus; viewed rom above, anterior row gently recurved and poster row slightly procurved; viewed rom in ront, anterior row gently procurved. Lateral eyes on gently raised tubercles. Height o clypeus nearly .33 times the diameter of AME. Ratio of eyes AME ALE PME PLE 6 o o . AME separated from one another by a little less than their radius and from ALE by slightly less than their diameter. PME separated rom one another by nearly .5 times their diameter and from PLE by nearly 2.7 times their diameter. Central ocular quadrangle wider in ront than behind in ratio, o.f nearly 2o 7; slightly wider in front than long. Chelicerae" robust; very gibbous dorsally at base; promargin o ang groove with three teeth and a fairly well developed scopula; the retromargin has four teeth the first of which is minute. Maxillae: convergent but not meeting beyond lip; abruptly truncate distally; with a well developed .scopula. Lip: quite typical of the genus in general; widest just below middle where it is slightly wider than long. Sternum: quite typical of the genus in general; widest between second coxae; nearly four-fifths as wide as long; posterior end just opposite bases of fourth coxae which are separated by nea.rly one-fifth of their width. Legs: 423 in order of length; all legs with spines. Palp: important features shown in Figures 8o; tibial apophysis quite distinctive. Abdomen: essentially typical of males of the genus; with a very small, poorly defined, dorsal, basal scutum which is somewhat better defined in some paratypes. Color in alcohol" carapace and chelicerae a rich, dark, reddish brown; maxillae, lip, palps, legs and sternum all yellowish-brown with variations too indefinite to describe in detail; sternum finely pitted and with short, stiff hairs. The abdomen is a purplish-brown dorsally and dorsolaterally; ventrally it is light yellowish; there is a narrow, irregular purplish band ventral to. the spinnerets.
Diagnosis. This species appears to be closely related to. finely serrated along: ventral margin. Eyes: eight in two rows essentially as usual in the genus; viewed from above, anterior row slightly recurred and posterior row gently procurved; viewed from in front, anterior row .slightly procurved. Central ocular quadrangle slightly wider behind than in front; wider behind than long in ratio of nearly 19 16. Ratio, of eyes AME ALE PME PLE nearly 6.5 5.5 5 5. _A_ME separated from one another by nearly their diameter and from _ALE by slightly more than their ollow.s the eatures ox the male holotype so closely that a detailed description is regarded as unnecessary. The epigynum seems to. be obscurely distinctive (Fig. 15). As usual in this genus, variations in the appearance o the epigynum have been noted among the emales available or comparison (Fig. I6).
Diagnosis. This species appears to be another member o. Records. The described emale paratype was taken in the same locality and at the same time as the male holotype. Both sexes are in the collection rom the ollowing localities in the Panama Canal Zone: Canal Zone Forest Preserve, August, 1939;Gatun, February and March, 1958;Barro Colorado Island, Corozal and Petrunkeviteh, 1911" 465;1925: 75;Roewer, 1954: 595;Bonnet, 1956" 1210.
This species has not appeared in my collections rom Panama and, as tar as I have been able to determine, has not been reported since the original description was published by the author of the species.
Corinna crassilalI)is Chickering Figure 17 C'orinna crassi#al#is Chiekering, 1937: 22, figs. 15, 21, 65-66. The male holotype from Barro Colorado Island, Panama Canal Zone, is in the Museum of Comparative Zoology, Roewer, 1954: 596;Bonnet, 1956Bonnet, : 1210 In 937 I had only the male holotype, two female paratypes and one additional male paratype. At present the collection includes several additional males and ]?ema.les all from the following localities in the Canal Zone: Barro Colorado Island, Fort Randolph and Fort Sherman and all were collected in June, July and August, i936, I939 and 95o. Figure 7 represents a clearly outlined epigynum.
Corinna' luteomaculata Petrunkevitch Corinna luteomaculata Petrunkevitch, 1925: 154, figs. 77-78. The female holotype from Cerro Flores, Panama is in the Peabody Museum, Yale University, Roewer, 1954" 598;Bonnet, 1956Bonnet, " 1213 This is another species which has not appeared in my collection rom Panama and is still known only ro.m the female holotype.
Corinna tenubra sp. nov. Figures I8-22 Holotype. The male holotype is from Barro Colorado Island, Panama Canal Zone, June, 195o. The name o the species is an arbitrary combination of letters. Description. Total length, including extended chelicerae, nearly 7.86 rnrn. Carapace 2.93 mm long; nearly :2.20 mm wide opposite second coxae where it is widest; nearly 0.88 rnrn tall shortly behind PME and then slightly descending to, beginning of posterior declivity opposite, interval between third and fourth coxae; with a fairly well defined median thoracic groove. Eyes: eight in two rows as usual in the genus; viewed frorn above, anterior row moderately recurved and posterior row definitely procurved (Fig. 18). Central ocular quadrangle only slightly wider in front than behind; abo,ut as wide in front as long. Ratio o,f eyes A,ME :ALE PME PLE nearly 8 9 8.5. AME separated frorn one another by slightly more than their radius and from ALE by slightly less than their radius. PME separated from one another by nearly their diameter and from PLE by nearly .3 times their diameter. Lateral eyes separated by nearly the radius of ALE. Height of clypeus nearly equal to the diameter of AME. Second row of eyes only slightly wider than anterior row. Chelicera,e: robust; much extended; slightly divergent; teeth along fang groove not determined because of secretion and fragility of holotype unusual concavity at each anterolateral corner (Fig. I9); posterior end sharply pointed and just opposite bases of fourth coxae which are separated by nearly one-third of their width. Legs: 4123 in order of length; all legs with spines.; typical in general ot the genus. Palp: essential eatures shown in Figures 20-:22; tarsal canaliculus simply folded, not intricately convoluted. Abdomen: all parts essentially typical of males of the genus. Color in alcohol: carapace a rich reddish brown with darker streaks radiating from region ot median thoracic groove; with a moderate amount of black pigment in ocular area; chelicerae nearly like carapace; sternum a medium yellowish brown; legs light yellowish brown with some variation; abdomen generally yellowish, lighter ventrally; just dorsal to spinnerets there is a purplish area which continues dorsolaterally with diminishing clarity to base.
Diagnosis. This species seems to be most closely related to Gorinna mucronata F. P.-Cambridge. The palpal features together with the unusual sternal concavities definitely establish it as. a new species.
Banks (929) reported the species from Barro Colorado Island and Fort Sherman, Panama Canal Zone..At present the collection in the Museum of Comparative Zoology includes numerous specimens of both sexes from Barro Colorado Island, July-.August, 934, 936 and I939 together with specimens taken in May, I964. I also have collected the species in Boquete, E1 Valle and Porto Bello all in Panama.
There is considerable variation in size among the specimens now available for study. The sternum is quite convex and nearly as. wide as long. The male palp has a complicated tibia and tarsus. There is considerable variation in the appearance of the temale epigynum  Corinna robusta Chickering, 1937: 25, figs. 20, 53, 75-76. The male holotype from. Barro Colorado Island, Panama Canal Zone is in the Museum of Comparative Zoology. Roewer, 1954: 599;Bonnet, 1956Bonnet, " 1216 In addition to the holotype and described emale paratype the collection now includes one male ?rom Barro Colorado Island, July-August, 936 and two emales rom the same locality, June-July, 934 and July-August, 936 together with a emale rom E1 Valle, Panama, July, 936 and a female from Porto. Bello, Panama, .August, 936. The species has not been /?o.und in my collections from Panama since 936. As usual in this genus, the epigynum varies considerably in appearance among the ew specimens available or study (Fig. 26 Roewer, 1954: 600;Bonnet, 1956Bonnet, : 1216 The collection in the Museum of Comparative Zoology now ineludes one male, June, x95o and nine females collected June-July, x934; June 25, 936; July-August, 939. All are ?rom Barro Colorado Island, Panama Canal Zone. There is considerable variation among the females regarding the appearance of the epigynum and some uncertainty exists regarding the correct identification.