70 AMERICAN COLEOPTERA. 



thorax, but the basal impressions are at most but feebly bistriate 

 with the outer stria very small or obsolete. The elytral markings, 

 which occur in transversale and rarely in lugubre, recall the next 

 group. The legs are entirely rufous or testaceous, except in trans- 

 versale, in which the femora are rarely piceous. 



The five species known to me may thus be separated : 



Basal impressions of thorax with the outer stria small, but distinct. 



Thorax distinctly narrower at base than apex, sides distinctly sinuate behind, 

 hind angles rectangular; form very slender, elongate, depressed ; head 

 large, scarcely narrower than the thorax ; elytra slightly wider than the 

 thorax, subparallel, moderately deeply striato-punctate, the striae entire; 

 legs rufous. Length .21-.25 inch grandiceps n. sp. 



Thorax very slightly narrower at base than apex. 



Moderately elongate, depressed ; head and thorax nigro-seneous, elytra dark 

 brown or piceous. moderately deeply striato-punctate on the disc, less so 

 at sides and tip, the five inner strise entire, the sixth and seventh abbre- 

 viated behind, the latter often wanting ; thorax about one-half wider 

 than long, sides feebly sinuate behind, hind angles subrectangular ; legs 



rufous. Length .19-.22 inch guexi Chaud. 



Slightly elongate, less depressed ; nearly black, usually slightly bluish or 

 seneous; elytra less wide as compared with the thorax, striate nearly as 

 in guexi, the six inner striae entire, the seventh abbreviated behind or 

 wanting ; thorax more than oue-half wider than long, sides obsoletely 

 sinuate behind, hind angles slightly obtuse ; legs rufous. Length .22- 



.25 inch fugax Lee. 



Basal impressions of thorax with the outer stria obsolete ; larger species. 



Head and thorax nigro-seneous, the latter with the hind angles rectangular or 

 sub-obtuse, sometimes obsoletely carinate ; elytra testaceous with darker 

 transverse bands, or nigro-aiueous transversely banded with testaceous, 

 mt)re or less deeply striato-punctate, the six inner striae entire, the sev- 

 enth varying from entire to wanting; legs testaceous or nearly rufous, 

 the femora rarely piceous. Length .24-. 34 inch. .traiiSTersale Dej. 



More elongate; bluish black, elytra rarely with the apex more or less testace- 

 ous; hind angles of thorax subacute, very finely carinate; elytra with 

 the first and second and rarely the fifth striae entire, the others abbre- 

 viated ; legs testaceous or rufo-testaceous. Length .26-. 30 inch. 



lugubre Lee. 



38. B. grandiceps n. sp. — Form very slender, elongate, very de])ressed. 

 Head and thorax piceous or nearly idack, scarcely aeneous ; elytra usually dark 

 brownish, with the margin and tip and sometimes the suture darker, rarely en- 

 tirely piceous. Head very large, scarcely narrower than the thorax ; palpi dark 

 rufous; antennae more than one-half the length of the body, fuscous, the first 

 joint dark rufous. Prothorax scarcely oue-half wider than long, distinctly nar- 

 rower at base than apex, slightly rugose at base; apex emarginate ; median line 

 distinct, abbreviated before and behind ; transverse impressions distinct ; basal 

 impressions broad, bistriate, the outer stria small ; sides with the margin distinctly 

 reflexed, arcuate in front, distinctly sinuate behind ; hind angles rectangular. 



