II. C. FALL. 



165 



follows : In brevicornis the pubescence is shorter, the head wider 

 and more strongly punctate, the tempora a little longer, the antennae 

 shorter, with the outer joints much more transverse, the pronotum 

 less finely punctate, the presternum longer before the -coxae, the 

 femora more slender, the middle coxae more widely separated, the 

 posterior tibiae feebly sinuate and mucronate in the male (not at all 

 so in elongata), the fifth ventral much shorter. In brevicornis the 

 sixth ventral is apparently normally visible in both sexes, but not 

 at all so in the female of elongata, and sometimes not in the male. 



C elongata Gyll. — Elongate, parallel, depressed : pubescence pale, rather 

 long, recumbent. Head scarcely more than two-thirds as wide as the prothorax ; 

 very lightly, finely, sparsely punctate; eyes moderately prominent; tempora 

 short. Antenna? almost reaching the basal angles of the protborax, the seventh 

 joint slightly longer than wide, 8 subtransverse, 9 and 10 distinctly but not 

 strongly transverse. Protborax transversely quadrate, sides feebly rounded in 

 front, and a little convergent behind ; surface finely, sparsely punctate, basal 

 fovea rounded and moderately deep; side margin finely crenulate in front and 

 with a few more prominent denticles posteriorly. Elytra oblong, parallel, obtusely 

 rounded at apex, finely seriately punctate, the intervals more finely so. Beneath 

 finely punctate, the punctures closer and a little coarser anteriorly and toward 

 the sides of the metasternum. Metasternum much longer at sides than the first 

 ventral segment; middle coxae separated by one-third the coxal width. Legs 

 rather stout. (PI. V, figs. 57 and 57«b 



Male. — Front and middle tibiae sinuate within near the apex, the inner apical 

 angle mucronate ; fifth ventral distinctly longer than the fourth, not impressed 

 and moderately strongly rounded at apex. 



Female. — Tibiae straight : fifth ventral nearly as in the male. 



Length 1.4-1.8 mm. 



Hub. — Massachusetts; New York; Pennsylvania; Michigan; 

 Iowa ; California. 



A common species which has become nearly or quite cosmopoli- 

 tan. It need not be confused with any other species of our fauna 

 except brevicornis, which see for a comparative statement. 



C. ferrujsjinea Marsh. — Oblong, moderately convex, ferruginous-brown, 

 bead often a little darker, pubescence very short, fine and appressed. Head with 

 rather sparse and fine but moderately deep punctures; eyes moderately large ; 

 tempora very short ; antennae nearly or quite reaching the hind angles of the 

 protborax; the joints a little variable, but the seventh is usually just visibly 

 longer than wide, the eighth subglobular. the ninth and tenth subquadrate or 

 only very slightly transverse. Protborax transversely subquadrate. widest 

 before the middle, the base and apex suhequal ; sides broadly rounded in front, 

 slightly convergent behind, margin feebly serrulate ; surface rather sparsely and 

 finely but quite strongly punctate; basal fovea rounded and usually well im- 

 pressed. Elytra oblong-ovate, sides moderately arcuate ; stria- scarcely impressed, 

 punctures fine: intervals very finely, sub-biseriately or irregularly punctulate, 



TRANS. AM. KNT. SOC. XXVI. DECKMBER, 1899. 



