368 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



vertical width of their upper lobes; in the female by slightly more than the 

 width of their upper lobes. Antennae thin, nearly as long as the entire body 

 in the male, but little longer than half the body in the female, the tenth joint 

 (c^) fully four times as long as wide, color yellow, the outer joints dusky. 



Prothorax widest shghtly in front of the base, sides distinctly convergent 

 from this point to the apex, surface sparsely irregularly punctured, the pale 

 areas with very few punctures, the M rather narrow, a little irregular, but 

 sharply defined and nearly attaining the front margin; side margins broadly 

 smooth. 



Elytra twice as long as the prothorax, striae irregular, first strongly deflected 

 about the shield, and in front of the latter geminate with a short scutellar 

 stria; second and third geminate and entire, fourth irregular but entire, fifth 

 and sixth represented by a few confused basal punctures, three or four others 

 at the middle and a short impressed fragment at the declivity; seventh and 

 eighth entire, the latter with a pronounced subhumeral dislocation; marginal 

 interspace impunctate. The black markings represent the standard spots, 

 of which the humeral spot is isolated, the middle and posterior ones of the 

 outer series are connected along the margin, and each is connected to the 

 corresponding one of the inner series; the spots of the inner series are longi- 

 tudinally confluent so as to leave an impunctate juxta-scutellar spot, the large 

 shield and the apex yellow. 



Pygidiuni almost entirelj^ yellow; body beneath blackish, sides and tip of 

 abdomen pale. 



Legs yellow, the middle and posterior femora and tibiae with faint median 

 fuscous spots or shades, the tips of the thighs whitish yeUow. 



Length 3.2 to 3.5 mm.; width 1.6 to 1.95 mm. 



Distribution. — The type is a female from "Lower California," 

 sent by Mr. Liebeck. There is a single male from Tepic, Mex- 

 ico, in the National Miis. Coll. This latter bears the name P. 

 inclusus Jac, but is quite distinct from a specimen of the latter 

 sent me from the British Museum Collection, and bearing the 

 name inclusus in Jacoby's handwriting. This species, by the 

 peculiar elytral striae and large shield, looks quite unlike any- 

 thing else in our fauna, and though it is not impossible that it 

 has been described from Mexico, I am unable to locate it and 

 venture to give it a name. 



52. Pachybrachys peninsularis new species 



Rather large, dark brown and yellow mottled, the darker 

 color predominant on the thorax, the elytra either with the brown 

 predominating or with the colors about c(iual in extent. Eyes 

 separated by a distance less than the length of the basal anlennal 

 joint. Antennae very slendcT, the terminal joint in the male 



