430 MEMOIRS ON THE COLEOPTERA 



at apex, somewhat elongate, circularly rounded in less than posterior half, 

 the sides very feebly arcuate, the apex truncate, the nuchal lobe extremely 

 feeble; punctures rather coarse, very close-set and impressed, not quite 

 as large as those of the head, with a mere vestige of an impunctate line 

 basally; scutellum densely velvety-black; elytra not quite as long as wide, 

 as long as the prothorax and evidently wider, rather feebly, very densely 

 punctate; abdomen with rather coarse and well separated punctures 

 throughout, the hairs rather sparse; foveolae wanting; each segment, 

 basally, has two elongate velvety-black submedial spots, 'separated by an 

 area which is shining, very finely punctulate and unevenly clothed with 

 fulvous pubescence; under surface coarsely punctate; sixth ventral (cf) 

 with a deep, sharply triangular apical notch, only one-half wider than 

 deep, the adjacent surface conically impressed almost to the base of 

 the segment; the fifth is feebly, circularly sinuate medially, with the 

 adjacent surface broadly and very feebly impressed. Length (cf 9 ) 

 13.8-15.5 mm.; width 3.8-4.0 mm. Mexico (Durango City), Wickham. 



Similar in some respects to modestus Sharp, from Jalapa, but 

 much smaller, with coarser and very much better defined punctua- 

 tion of the head and pronotum, the velvety-black spots of the 

 abdomen separated by an area of fulvous pubescence. Neomexi- 

 canus Bernh. (modestus \\ Fall) also belongs to this group but is 

 smaller than any other species. 



Philonthus Steph. 



The following eight species belong to section A of Horn, having 

 three discal punctures in each of the pronotal series and the 

 anterior tarsi dilated in the male. 



Philonthus wacoensis n. sp. Form and general characters nearly as in 

 hepaticus Er., shining, nearly black above, the elytra testaceous apically; 

 head and abdomen black; legs testaceous, the antennae fuscous, pale 

 basally, distinctly incrassate, nearly as long as the head and prothorax, 

 the outer joints as long as wide; head as wide as long, nearly as in hepaticus 

 but with more broadly rounded basal angles; prothorax nearly as in that 

 species but much shorter, slightly wider than long, similarly wider than 

 the head and with the sides nearly straight and converging from near 

 the base, which is broadly rounded, piceous-black in color; scutellum 

 large, two-thirds as long as the elytral suture; elytra evidently not as 

 long as wide, fully as long as the prothorax, at base fully as wide as the 

 latter and at apex wider; punctures rather strong, moderately close and 

 subasperate; abdomen tapering from the base, finely and very sparsely 

 punctate; sixth ventral (cf ) with a deep triangular notch at apex, the 

 adjoining surface strongly and angularly impressed; tarsi slender, the 

 anterior rather broadly dilated. Length (c?) 4.0 mm.; width 0.8 mm. 

 Texas (Waco). 



