270 GEO. H. HORN. 



Thorax with a pale border not alutaceous. 



Thorax entirely piceous, and, with the head, alutaceous moratus. 



Antennse 8-jointed ; thorax alutaceous iiioiitieola. 



Elytra distinctly narrowed posteriorly almost from the humeri; thorax quite 



smooth and entirely piceous sutiiralis. 



3. — Posterior femora longitudinally strigose and sparsely punctate. 



Prosternum distinctly carinate : niesosternum with distinct protuberance. 



Elytra very indistinctly punctate; antennae Bjointed despectiis. 



Elytra well punctate; autennte 8-jointed... subcupreus. 



Elytra not punctate; antennje 7-jointed ; niesosternal elevation almost 



laminiform degener. 



Prosternum absolutely simple. 



Mesosternum more or less protuberant, sometimes, however, with a slight 



tubercle only digestus. 



Me-sosternum absolutely plane rufiveiifris. 



Posterior femora densely punctulate and pubescent, except near the tip; 

 color never a true piceous black and without reneous lustre. 



iiifuscatiis. 



V, <Ii!$siniilis Horn. — Oblong, subdepressed, piceous, shining, lateral bor- 

 der of thorax testaceous, more broadly posteriorly, sometimes also the outer 

 portion of the apical border (PI. iv, fig. 14) sides of elytra indistinctly paler. 

 Antennfe 8-jointed, testaceous, club piceous. Head relatively coarsely and mod- 

 erately closely punctate. Thorax moderately coarsely and closely punctate, hind 

 angles distinct but obtuse, basal marginal line absent. Elytra oblong, parallel, 

 narrowed at apical third, sutural stria deeply impressed two-thirds to base, sur- 

 face closely punctured, a little more coarsely than the thorax, when viewed 

 longitudinally forming indistinct lines, the two outer striiE faintly indicated by 

 slightly coarser punctures. Body beneath piceous, opaque. Legs piceous, tibiae 

 and tarsi pale. Posterior femora with a finely punctured, but not opaque space 

 near the base, otherwise smooth and spar.sely punctate, anterior and middle 

 femora den.sely punctulate, opaque and finely pubescent, except the apical third 

 Length .12— .16 inch.; 3—4 mm. 



Prosternum simple, mesosternum without trace of any elevation 

 whatever. 



Maxillary palpi .stout, the pseudo-basal joint (PI. iv, fig. 13) espe- 

 cially thickened. Claws slender, simple and feebly curved. 



This insect resembles strikingly some of the smaller forms of 

 Cymbiodyta lacustris, and is therefore very much less convex and 

 more parallel than usual in the present series. 



The two specimens from which the original description was made 

 were plainly immature, the elytra being brown and the legs quite 

 j)ale, but more mature specimens since obtained are entirely piceous 

 black with the sides of the thorax very decidedly and of the elytra 

 indistinctly paler. 



Occurs in Oregon and California as far south as San Francisco. 



