COLEOPTERA. 153 



feeV)ly einarginate belihid ; disk depressed, highly polished, narrowly im- 

 pressed along the suture ; punctures fine, sutural row of eight or nine, discal 

 row arc-uate toward the suture, of about nine, lateral row of ten, usual row of 

 fine closely placed punctures along the crest of the upper epipleural margin, 

 and another of excessively fine punctures along the upper edge of the lower 

 margin ; surface strigate, slightly more strongly than the pronotum. Abdo- 

 men at base nearly as wide as the elytra ; sides nearly straight and strongly 

 convergent ; border strong toward base ; surface broadly convex, highly 

 polished, minutely and transversely strigate ; each segmpnt rather coarsely 

 and closely punctate toward base, impunctate toward apex except a row of 

 punctures along the apical edge ; under surface slightly more closely and 

 coarsely punctate, not appreciably strigate. Legs long and slender ; middle 

 and posterior tibiae fimbriate at apex with unequal coarse spines ; femora 

 with three or four erect coarse spines along the lower edge at tip ; posterior 

 tarsi slender, first joint but slightly longer than the next two together. 

 Length 3.5 mm. 



PeniLsylvania, near Philadelphia, 1. 



According to tlie table given V)y Dr. Horn this species should follow 

 consors. In inqirisitvs the sides of the pronotum near the apical 

 angles are strongly margined ; the margin becomes much narrower 

 toward the base. 



Dr. Horn's paper on this genus is rather misleading in regard to 

 the two species lucidulus and consors, as no mention is made of the 

 important punctures to be seen on the pronotal disk outside of the 

 two specified by him ; they are, however, mentioned by Dr. LeConte 

 in iiis original descriptions. 



APOCEI.I.IJS Erichs. 



From the marked variations ascribed by Dr. LeConte (Trans. Am. 

 Ent. Soc. VI. p. 247) to the insects of this genus, it occurred to me 

 that a revision under better conditions might give rise to a more satis- 

 factory solution of the difficulty; the following synopsis is the result 

 of this study. All the characters of the table are taken from males, 

 and the descriptions are also drawn from the same sex except when 

 indicated to the contrary. 



Our species seven in number may be tabulated as follows : — 



Head about equal in width to the prothorax ; sides of the latter arcuate ; 

 femora generally robust. 



Second joint of the antennae equal in length to the third 1. 'bicolor. 



Second joint much shorter than the third, the latter more elongated. 



Prothorax as wide as long ; antennae rather slender ; abdomen i)iceous- 



brown, border becoming narrower posteriorly 2. spliaei'icollis. 



Prothorax broader than long; antennae short, nearly black, robust; 

 al)domen nearly black, border very deep, vertical, very thin, not 

 gradually decreasing posteriorly 3. cra.SSlC01'IllS> 



