Contribution to the Knowledge of the Genus Linda Thomson, 1864 (Part I), with the Description of Linda (Linda) subatricornis n. sp. from China (Coleoptera, Cerambycidae, Lamiinae)

Linda Thomson, 1864 [1], includes two subgenera, Linda and Dasylinda, mostly confined to China [2]. While studying more than 150 specimens of Linda (Linda) atricornis Pic from different localities, we were surprised to observe two very different kinds of male genitalia. We concluded that two superficially similar species have been historically misidentified as one species. We had examined the types of L. atricornis, L. gracilicornis, L. major (the three known species of subgenus Linda with elytra and antennae all black), and most of the other species of this genus. After careful observation and dissection, we separate L. subatricornis n. sp. and herein describe it as new to science.


Introduction
Linda Thomson, 1864 [1], includes two subgenera, Linda and Dasylinda, mostly confined to China [2].While studying more than 150 specimens of Linda (Linda) atricornis Pic from different localities, we were surprised to observe two very different kinds of male genitalia.We concluded that two superficially similar species have been historically misidentified as one species.We had examined the types of L. atricornis, L. gracilicornis, L. major (the three known species of subgenus Linda with elytra and antennae all black), and most of the other species of this genus.After careful observation and dissection, we separate L. subatricornis n. sp. and herein describe it as new to science.

Male Terminalia (Figures 2(a)-2(d))
. Tegmen length about 3.0 mm; lateral lobes not so stout, each about 0. ; median foramen slightly elongated; internal sac about twice as long as median lobe plus median struts, with 3 pairs of basal armature, and 2 pair of rods of endophallus; 2 longer rods each about 1.5 mm, about onehalf of tegmen length, the shorter pair about 0.6 mm.The ratio of short pair to long pair always bigger than 1/3.

Male Terminalia (Figures 4(a)-4(f))
. Tegmen length about 3.0 mm; lateral lobes stout, each about 0.5 mm long and 0.25 mm wide, mostly covered with moderate long setae, with one short but broad basal lobe furnished with short setae (in ventral view, Figure 4(d)); median lobe plus median struts slightly curved (Figure 4(b2)), a little longer than tegmen (6 : 5); the median struts slightly longer than half of the whole median lobe in length; dorsal plate slightly shorter than ventral plate; apex of ventral plate narrowly rounded (Figure 4(c)); median foramen elongated; internal sac less than twice of median lobe plus median struts in length, with 3 pairs of basal armature, and 2 pairs of rods of endophallus; 2 longer rods each about 1.9 mm, longer than one-half of tegmen, the shorter pair about 0.6 mm.The ratio of short pair to long pair always smaller than 1/3.Tergite VIII (Figure 4(a)) broader than long, apex truncated, rounded at side, with dense but short setae (hairs).

Female Genitalia (Figures 4(g)-4(j))
. Spermathecal capsule having a strongly sclerotized rounded apical lobe (with a short to long stalk) and a not so sclerotized basal stalk, spermathecal duct not very longer than spermathecal capsule.Spermathecal gland extended from a strongly sclerotized broad ring, which attach to duct directly.Tignum shorter than abdomen.In our observation, tignum 6.8 mm for an adult with a 9.0 mm abdomen in ventral view.
Diagnosis.Differs from L. atricornis by antennal insertions black, extreme bases of tibiae black, groove of last visible sternite of male not so broad, last antennomere longer than tenth antennomere, rods of endophallus slender and the ratio of short pair to long pair smaller than 1/3, lateral lobes stouter, and so forth.Differs from L. major and L. gracilicornis by antennal insertions black, femera mostly black, and body not over 20 mm.Differs from all the other species of subgenus Linda by antennae and elytra all black.
Etymology.Named after misidentification as L. atricornis in the collections.
Remarks.The female genitalia is difficult to separate species.In this species, the stalk attached to the strongly sclerotized rounded apical lobe is quite variable in length (Figure 4(h)-4(j)).