128 MEMOIRS ox THE COLEOPTERA 



68 Head about as wide as the prothorax, with conspicuously promin- 

 ent eyes 69 



Head always distinctly narrower than the prothorax, the eyes generally 

 much less prominent 75 



69 Prothorax relatively smaller, at base much narrower than an ely- 

 tron, the sides broadly and only very feebly sinuate basally; anten- 

 nae long and slender, filiform, the second and third joints equal . .70 



Prothorax broader, at base subequal in width to an elytron, the sides 

 becoming parallel for some distance before the hind angles; antennae 

 less elongate 71 



70 Body ventricose, convex, polished throughout, black, with slight 

 greenish lustre, the elytra each with a basal spot, and an external 

 fascia at basal and apical third, the apex also pale, the spots generally 

 nubilously defined; under surface black, the legs pale flavo-testa- 

 ceous; head but just visibly narrower than the prothorax, the sulci 

 parallel on the front, converging on the epistoma; antennae slender, 

 fusco-testaceous, the three basal joints and base of the fourth tes- 

 taceous, not quite as long as the elytra, the medial joints slightly 

 more than twice as long as wide; prothorax a third or fourth wider 

 than long, truncate at apex and base, the base four-sevenths the 

 maximum width; sides evenly and strongly rounded, becoming arcu- 

 ately oblique in about basal half; angles right; impressions and stria 

 very feeble; foveae small, deep, elongate, next to the very short 

 vestigial carina; elytra one-half longer than wide, nearly three- 

 fourths wider than the prothorax, gradually obtusely ogival in more 

 than apical third, the sides rapidly rounding at the humeri; striae 

 relatively rather coarse but scarcely at all impressed, obsolete near 

 the apex, the punctures deep, rather large and close-set, the foveae 

 near basal and apical third. Length (cf 9 ) 2.8-3.1 mm.; width 

 1.0-1.2 mm. Rhode Island to Illinois and southward to Galveston 

 and Austin, Texas. Abundant. [Bemb.fallax Dej.] affine Say 



Body even more strongly ventricose, nearly similar in coloration, lustre 

 and in general habitus throughout, but with the antennae longer, 

 being fully as long as the elytra, with the medial joints fully two 

 and one-half times as long as wide, the first and second joints 

 exactly equal; prothorax less transverse, only just visibly wider than 

 long, strongly rounded laterally more anteriad, the sides arcuately 

 oblique from far before the middle; base more finely, evenly rugulose 

 and without the coarse subserial punctures observable in affine; 

 elytra relatively shorter, not quite one-half longer than wide, almost 

 similarly sculptured and maculate. Length (cf) 3.1 mm.; width 

 1.25 mm. Michigan (Marquette) thespis n. sp. 



71 Elytral striae entire. Form oblong-oval and rather convex, shining 

 throughout and black, with greenish lustre; elytra flavo-testaceous, 

 with a feeble cloud near the scutellum, a transverse submedial fas- 

 cia, broadly united suturally with a more posterior, transversely 

 oval area, black, the anterior fovea also within a small dark spot; 

 under surface black, the inflexed sides piceous, the legs bright rufous, 

 very slender; head just visibly narrower than the prothorax, more 

 evidently (9), the sulci deep and subparallel, abruptly very fine 



