Goleopteroloyical Notices, VI. 555 



17. L,. cauesceiifi Maun. — Bull. Mosc, 1843, p. 247 (Dasytes); Mots.: 

 1. c, 1859, ii, p. 391 (Listrus); Lee: Proc. Acad., Pblla., 186G, p. 357 (Lis- 

 trus) . 



Somewhat narrow, convex, polished, black with a strong viri- 

 di-asneous lustre; legs black, the tibise and tarsi faintly picescent ; 

 antennae black, the second joint piceo-testaceous ; pubescence 

 rather short and sparse, moderatel}' coarse, denuded in large 

 areas on the elytra of which two wide and straight transverse 

 fasciae on the elytra behind the middle are especially noticeable, the 

 anterior frequently interrupted at the suture ; interspaces on the 

 head and median parts of the pronotum smooth, flat and almost 

 sculptureless. Head nearly four-fifths as wide as the prothorax, 

 rather sparsely and unequally punctate, the impressions verj- 

 feeble ; e3'es moderately- prominent ; antennae slender, nearly one- 

 half longer than the prothorax, the tenth joint slightly longer 

 than wide. Prothorax two-fifths wider than long, the sides con- 

 vergent and feebh' arcuate from near the base ; disk rather 

 closely and strong!}- punctate, rugose and opaque in lateral 

 fourth. Elj'tra three-fourths longer than wide, slightly wider 

 than the prothorax, parallel, parabolic at apex, coarsely and mod- 

 eratel}^ closely punctate. Length 2.7 mm.; width 1.0 mm. 



California (Marin Co.). The fifth ventral of the male is one- 

 half longer than the fourth, flat and normally pubescent in basal 

 half, but clothed with long dense and semi-erect black hairs and 

 also feebh' impressed toward apex, the latter broadl}- and dis- 

 tinctly sinuate; behind the sinus the pubescent under surface of 

 dorsal pygidium is distinctl}' visible. Four perfectly uniform male 

 specimens. 



18. L. difficiliii Lee— Proc. Acad. Nat. Sci., Pbila., II, p. 170 (Dasy- 

 tes); \. c, 1866, p. 358 (Listrus). 



Narrow, convex, black, with a greenish-metallic lustre, the pu- 

 bescence nearly as in canescens, the denuded band just behind 

 the middle feeblj- bisinuate and the subapical band frequently 

 broken into two spots on each elytron. Head three-fourths as 

 wide as the prothorax, the eyes prominent and at some distance 

 from the base ; surface confusedly punctato-rugose ; antenna? pi- 

 ceous, the basal joint black, the second testaceous, outer joints 

 cinereo-pubescent, the tenth as wide as long. Prothorax one-half 

 wider than long, the sides strongl}- convergent and almost 



