Coleopterological Notices, III. 79 



sparsely punctate. Legs long and slender ; basal joint of the hind tarsi four- 

 fifths as long as the remainder. 



Male. — Unknown . 



Female. — Eyes separated by one-fourth of their width ; anterior tarsi with 

 the two basal joints simple, the third rudimentarily lobed, the fourth strongly 

 lobed, the intermediate with the three basal joints simple, the fourth strongly 

 lobed , posterior simple, the penultimate joint with a short, narrow, extremely 

 rudimentary lobe. 



Length 11.0 mm. ; width 4.2 mm. J . 



Texas (Laredo). Cab. LeConte. 



The description is drawn from the female. It is very closely 

 allied to mexicana Champ., but differs from the corresponding sex 

 of that species in its slightly closer punctuation on the elytral inter- 

 vals ; there are usually but two punctures in a transverse direction 

 in mexicana, while in socia there are about three, which are rather 

 smaller than in the former. This is the only decided difference of 

 any kind which it is possible to discover, but I think that the two 

 species are distinct and that this would be clearly evident if the 

 males were compared. The elytra are perfectly simple and nar- 

 rowly rounded at apex in the female of socia. This species is not 

 at all closely related to punctulata. 



l». Sllfocuneata n. sp. — Elongate, moderately convex, the elytra cuneate, 

 black throughout, the head and prothorax smooth but dull and strongly alu- 

 taceous, the elytra more shining ; pubescence coarse, moderate in length, 

 very sparse. Head finely, rather densely, unevenly punctured, the epistoma 

 coarsely, much more sparsely so and more shining ; eyes very large ; antennae 

 filiform, fully one-half as long as the body. Prothorax three-fifths wider than 

 long, the apex truncate and two-thirds as wide as the base, the latter trans- 

 verse, with broad and deep sinuations, the angles right, not blunt ; sides 

 parallel and straight in basal two-thirds, then broadly, evenly rounded to 

 the apex ; disk extremely obsoletely impressed along the middle, coarsely, 

 extremely unevenly punctate, the punctures mingled with smaller ones, dense 

 toward the median line and base, sparse laterally, with two large impunctate 

 discal areas ; punctures shallow and variolate, the larger ones elongate-ellip- 

 tical in form ; basal foveas large and distinct but shallow. Elytra four times 

 as long as the prothorax, and, just behind the humeri, very slightly wider ; 

 sides feebly convergent and nearly straight from this point nearly to the apex, 

 which is then more abruptly, acutely rounded ; disk finely but distinctly 

 striate, the strise very finely, not closely punctate, the intervals nearly fiat, 

 finely, extremely sparsely punctate. Abdomen in the male finely, not strongly, 

 very sparsely punctate throughout. Legs slender, the hind tarsi nearly as 

 long as the tibiae, with the basal joint equal in length to the remainder. 



Male. — Eyes nearly as in punctulata; antennae with the third joint but 



