456 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



eyes widely distant, ocular lines wanting; front claws of male not 

 appreciably enlarged. Ave. length 4 mm. Kansas and Texas. 



Anie7inae moderate, dusky toward the tip. 



Prothorax strongly arcuately narrowed toward the front, punctuation rather 

 dense and moderately coarse, more or less substrigose in the lateral branches 

 of the M, narrowly sparser along the side margins. 



Elytra with eight regular and entire subimpressed punctured striae, a short 

 scutellar stria, and within the latter a few irregularly disposed punctures along 

 the suture; eighth stria not interrupted basally, the marginal interspace im- 

 punctate, shield wanting. 



Pygidium black at base, broadly apically yellow; body beneath black, the 

 last ventral segment in great part yellow; legs yellow. 



Length 3.5 to 4. .5 mm. ; width 2.2 to 2.8 mm. 



Distribution. — Texas: (type); Lavaca Co., May 27 (Hubbard & Schwarz); 

 Macdona, July 28 (Wenzel); "Tex.," many examples without indication of 

 exact locaHty — various collections. Kansas: (various collections); Douglas 

 Co. (Snow). 



The above rather short description is quite sufficient for the 

 recognition of this very distinct species, which is scarcely ap- 

 proached by any other in the regularity and completeness of the 

 elytral striation. In the male the elytra are slightly but obviously 

 gradually narrowed from the humeri, much as in certain pubes- 

 cent species, e. g. xanti. This species is exactly the striatus of 

 LeConte. The black variety referred to by LeConte is from 

 Garland, Col., and is not identical; it is quite surely Saj^'s nigri- 

 cornis. 



139. Pachybrachys othonus Say 



Robust, black, prothorax with the entire margin and a narrow 

 median anterior stripe yellow, elytra each with rather narrow sub- 

 sutural, discal and marginal vittae yellow, legs yellow; eyes widely 

 separated in both sexes, front without ocular lines; front claws 

 of male not enlarged. Ave. length 3.4 mm. United States and 

 Canada from the Atlantic Coast to the Rocky Mountains. 



Head closely punctate in the dark areas, which vary much in extent; eyes 

 separated in the male by about two and three-fourths and in the female by 

 fully three times the length of the basal antennal joint or by fully the vertical 

 length of the eye. Antennae moderate, black, more or less pale toward the 

 base. 



Prothorax strongly transverse, sides distinctly convergent in front, more or 

 less rounded in behind, surface very densely substrigoscly punctate and dull, 

 the median anterior yellow line and yellow margins, smooth. 



