Coleopterological Notices. 461 



wider than the head and about two-thirds wider than long ; base and apex 

 equal, the former transversely truncate, the latter feebly incurvate in circular 

 arc ; basal angles slightly obtuse, not rounded ; sides evenly and rather feebly 

 annate ; disk widest in the middle, somewhat coarsely, deeply punctate, the 

 punctures rather sparse toward the middle, dense but distinctly separated 

 toward the sides. Scutellum triangular, densely punctate, the border rather 

 narrow, impunctate. Elytra about equal in width to the prothorax and three 

 times as long in the female, somewhat shorter in the male, rather strongly 

 rounded at apex ; sides parallel, very feebly arcuate ; base scarcely perceptibly 

 wider than the base of the prothorax ; disk with rows of rather coarse, deeply 

 perforate punctures, the striae excessively feebly impressed, the punctures 

 generally separated by nearly twice their own diameters ; intervals from three 

 to four times as wide as the strial punctures, flat, each with a single even row 

 of rather coarse punctures which are not more distant than those of the striae. 

 Abdomen rather finely, sparsely punctured. Legs moderate ; fourth joint of the 

 posterior tarsi about equal in length to the first three. 



Male. — Anterior tarsi moderately dilated, densely spongy-pubescent beneath, 

 the third joint distinctly wider than the second ; intermediate very feebly 

 dilated, similarly clothed ; abdomen narrowly and scarcely perceptibly flat- 

 tened in the middle toward base. 



Length 4.1-4.8 mm. ; width 1.4-1.8 mm. 



Texas (El Paso). Mr. Dunn. 



Apparently abundant, and, although allied to parvulus, easily 

 distinguishable from that species, in addition to the characters here- 

 tofore noted, by the punctuation of the sutural interval which in 

 advena is generally confused; in parvulus there is a very regular 

 single row of punctures similar to those of the other intervals. 



COXIBIUS Lee. 



This genus is quite composite, and as here considered, embraces 

 five distinct typical forms, represented by seriatus, opacus, sulcatus, 

 gagates and granulatus, but as far as structural characters of value 

 are concerned, the groups may be limited to three. These groups 

 agree among themselves in all the characters before given in the 

 table of genera, but might possibly be considered of subgeneric 

 value ; at any rate, the difference in general habitus is quite remark- 

 able. As far as variety of type is concerned, Conibius ma}' be 

 considered the Asida of the Blapstini. 



The sexual characters are generally very slight, the tarsi being 



absolutely undilated in the male, but in a few species the anterior 



tibia? are modified in that sex as described below. As a curious 



coincidence, it should be mentioned that similar tibial modifications 



Annals N. Y. Acad. Sci., V, Nov. 1890.— 31 



