378 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



front claws of male distinctly enlarged. Ave. length 3 mm. 

 Illinois to Nebraska and Texas. 



Head not wider than the thoracic apex, front closely punctate in the broad 

 confluent markings, eyes separated by one and one-fourth to one and one-third 

 times the length of the basal joint of the antennae in the male, and by twice 

 the length of the basal joint or slightly more in the female. Antennae mod- 

 erate, fully attaining the hind coxae in the male, outer joints dusky. 



Prothorax distinctly narrowed in front, rather strongly rounded posteriorly, 

 especially in the male, sides sUghtly briefly sinuate immediately before the 

 hind angles, punctuation rather dense in the heavily marked shades represent- 

 ing the M, the smaller pale areas, including the side margins, sparsely punctate. 



Elytra broadly confusedly punctate baso-medially, the striae elsewhere in 

 great part more or less irregular or fragmentary, eighth stria sinuous but well 

 defined in the male, sometimes a little confused in the female; marginal inter- 

 space punctate, more numei'ously and completely so in the female; shield 

 small and inconspicuous as a rule, sometimes obsolete. 



Pygidium marked as usual. Body beneath (c?) blackish, except the ab- 

 dominal apex; ( 9 ) ferruginous with the abdominal margins or even the whole 

 abdomen paler. Legs rufo-testaceous to yellow with darker or blackish median 

 femoral and tibial spots. 



Length 2.75 to 3.2 mm.; wider 1.4 to 1.7 mm. 



Distribution. — Texas: (type 9). Kansas: Onaga (Crevecoeur). Iowa: 

 Iowa City, May and June (Wickham); Ebna, June 30 (Snow Coll.). Illinois: 

 Algonquin, June 10 (Nason); So. 111. (Soltau — Nat. Mus. Coll.), abnost pre- 

 cisely like the Suffrian type sent me bj^ Pi-ofessor Taschenberg. 



Var. xanthias Suffrian 



Yellowish, with slightly darker vague and diffuse rufo-testaceous or rust 

 colored shades. This is nothing more than a paler nearly uniformly colored 

 impurus, and all specimens seen by mo are females. 



Distribution. — The type localities are Pennsylvania and Mis- 

 souri. I have never seen a specimen of the true impurus or the 

 form xanthias from the Atlantic Slope and it is not unlikely that 

 Suffrian has mixed two species under this name. An example 

 from Nebraska in my collection is almost exactly like the Suf- 

 frian specimen sent me by Taschenberg, and others from Iowa 

 City, Algonquin, 111., and West Point, Neb., differ but slightly. 

 Before receiving this type from the Suffrian Collection for study, 

 I had — ^in common with Bowditch — provisionally identified as 

 xanthias the diversus new species of the present ])ai)c'r. This 

 latter, however, is abundantly distinct from the true xanthias 

 by its more shining surface, better marked elytral striae, distinct 

 ocular lines, and less enlarged front claws of the male. 



