122 NORTH AMERICAN 



antennae as long as the head and prothorax together, rather robust, club 

 very prominent, second joint slightly longer than wide, oval, joints three 

 to ten more or less transverse, the first nearly as long as wide, eighth very 

 short, twice as wide as long, ninth much longer, slightly more than twice as 

 wide as long, slightly shorter than the tenth which is also more than twice 

 as wide as long, eleventh much wider than the tenth, nearly globnlar, finely 

 and abruptly acuminate at tip ; maxillary palpi short and very robust, last 

 joint obli(|Ucly and inwardly produced at tip as a finely acuminate prolonga- 

 tion. Prothorax widest at one-tiiird its length from the apex where it is 

 scarcely wider than the head and ahont as wide as long ; sides broadly 

 rounded, very feebly convergent and straight posteriorly wiiere they are very 

 minutely and obscurely granulate, roundly arcuate anteriorly; apex trans- 

 verse and straight, slightly more than one-half as long as the pronotal width, 

 and slightly more thaii two- thirds as long as the base; disk polisiied and 

 impunctale, rather strongly convex, having in the middle a narrov,- acutely 

 impressed canaliculation beginning very near the apex and extending poste- 

 riorly for more than one-half the total length but scarcely entering the 

 transverse impression, the latter at less than one-fourth the length from the 

 base, is very broadly and strongly impressed, with the surface thence to the 

 basal edge rough and asperate with a narrow but distinct medial carina, and 

 becoming attenuated laterally where it coalesces with the lateral rounded 

 ileeply impressed circular spongy-pubescent foveae at more than one-third 

 the length from the base. Elytra at base scarcely wider than the pronotum ; 

 sides rather strongly divergent posteriorly and strongly arcuate ; surface 

 feebly convex ; disk shining, sparsely punctulo-asperate, scarcely as long as 

 wide, and about one-fourth longer than the jtronotum ; sutural striae very 

 fine but distinct, rather distant and arcuate ; each elytron has two large 

 basal foveae; lateral striae very broadly impressed, feeble and rather short. 

 Abdomen short and broad, nearly as wide as the elytra and rather shorter ; 

 sides parallel and feebly arcuate ; border rather narrow and inclined ; sur- 

 face broadly and rather feebly convex, shining, very minutely punctulo- 

 asperate ; first three dorsal segments equal in lengtli ; first two each with 

 two divergent distinct basal carinae, those of the second much shorter than 

 those of the first. Legs long and slender ; tibiae gradually swollen toward 

 tips. Prosternum very long, carinate throughout its extent. Length 1.3 mm. 



District of Columbia, 3; Lee County, Vii-ginia, 1. 



The (lescription is taken from the male ; the female is quite dif- 

 ferent in form, the abdomen being much longer and the carinae of 

 the second segment becoming almost obsolete ; the basal foveae of the 

 elytra are strong(;r ; the prothorax is slightly longer than wide and 

 the sides are feebly sinuate toward the base ; the head is much smaller 

 than in the male. Tlie most marked ilitference is, however, in the 

 eyes which are in the female very rudimentary, consisting of but three 

 rather large contiguous facets in a triangle on the extreme tips of the 

 lateral angulations of the head. The sexual characters at the poste- 

 rior portions of the body are, as might be expected, not striking. 



