446 MEMOIRS ON THE COLEOPTERA 



mandibles long, arcuate, straight basally; antennae having the outer 

 joints but slightly wider than long, the first about as long as the next 

 three; surface with numerous large foveae except medially, the median 

 line impressed apically ; prothorax much smaller than the head, wider 

 than long, obtrapezoidal, with the basally converging sides broadly 

 sinuate; serial punctures four, the posterior remote; scutellum black, 

 coarsely, very closely punctate; elytra shorter than wide, equal in 

 size to the head, the punctures fine and well separated; abdomen 

 intense black throughout, very closely sculptured, not at all iri- 

 descent or scarcely even shining; legs piceous-black throughout; 

 sixth ventral (d 71 ) with a large subangular sinus, occupying the entire 

 tip and fully four times as wide as deep. Female much smaller and 

 narrower than the male, the head less developed, the prothorax as 

 long as wide and the gular suture bifurcates at a point markedly 

 more posterior than in the male, nearly as in the male of moqu .its. 

 Length (cf 9 ) 8.0-13.0 mm.; width 1.35-2.4 mm. Arizona (Ben- 

 son), Dunn. Fourteen examples punctiventris n. sp. 



Abdominal punctures more or less sparse, the surface above and beneath 

 more shining 3 



3 Legs black throughout, the tarsi piceous. Male with the surface very 

 shining, nowhere iridiscent or metallic; head nearly as in the pre- 

 ceding and broadly quadrate, but with the eyes more convex and 

 the antennae much shorter and thicker, the outer joints broader, 

 very much wider than long; prothorax very much smaller than the 

 head, nearly as long as wide, feebly obtrapezoidal but more convex 

 and with less distinct apical angles than in punctiventris, the series 

 each with three smaller and equidistant, widely separated punc- 

 tures, the right series in the type with an adventitious additional 

 puncture; converging sides basally nearly straight; scutellum with 

 moderate and not very dense punctures; elytra nearly as long as 

 wide, subquadrate and narrower than the head; punctures fine and 

 rather sparse; abdomen with the sparse moderate punctures as- 

 perulate; sixth ventral (cf ) truncate at tip. Length (cf ) n.o mm.; 

 width 2.2 mm. California (near Indio), Dunn. . . .laticeps n. sp. 



Legs castaneous-brown, the posterior pair blackish 4 



4 Body (c?) small in size, the upper surface polished black, nowhere 

 iridescent or metallic, the elytra bright red; head moderate, quadrate, 

 the eyes slightly convex, at twice their length from the base, the 

 mandibles moderate, straight, curving slightly at apex; antennae 

 short, very thick, with the outer joints distinctly transverse, the first 

 much shorter than the next three together; surface with a number 

 of remote punctures laterally, the median line finely canaliculate 

 except apically and in basal half; prothorax not distinctly narrower 

 than the head, as long as wide, very feebly obtrapezoidal, the series 

 with four punctures, the posterior remote; scutellum black, finely, 

 closely punctate; elytra as long as wide, distinctly wider and longer 

 than the prothorax, the punctures fine and rather close-set, with an 

 uneven discal series of three or four setigerous punctures; abdomen 

 polished, the sparse punctures asperulate, the two discal series at 

 each side formed by single subbasal foveae on each tergite more 



