398 Coleopterological Notices, V. 



O. tetracarinatus Block. — Verz. Ins. Plauen., p. 116; depressus Grav. , 

 Micr., p. 103. 



This species is added on the authority of LeConte and Fauve], 

 as I have seen no American specimens. It is very readily distin- 

 guishable from nanus by its larger, longer elytra, stouter form and 

 less polished, somewhat reticulate abdomen, which is finely, sub- 

 granularly punctulate. Length 1.7 mm.; width 0.55 mm. Europe; 

 Indiana — LeConte. 



Omalini. 



The genera allied to Lesteva form a much more important ele- 

 ment in the omaline fauna of North America than of Europe, and 

 may be distinguished among themselves as follows : — 



Third joint of the maxillary palpi very small, not longer than wide, the 

 fourth extremely long as in Lesteva ; pronotum not impressed at the 

 sides ; labrum as in Lesteva, composed of two nearly equal parts, the 

 hasal corneous, transverse and broadly truncate, the apical abruptly 

 thin, translucent and rounded. 

 Elytra short, quadrate ; first four joints of the hind tarsi subeqnal in length, 

 the first not quite as long as the second ; antennae not clavate. 



Pseudolesteva 



Elytra long, extending to the apex of the third ventral ; fiist four joints of 



the hind tarsi subequal, the first not appreciably longer than the second ; 



antennae with the last three joints longer and thicker than the eighth, 



forming an elongate and very slender club Tevales 



Third joint of the maxillary palpi longer than wide ; pronotum always im- 

 pressed near the middle of the sides. 

 Maxillary palpi filiform, nearly as in Lesteva, the second joini but slightly 

 thicker than the third or fourth; third very slightly longer than wide 

 and scarcely more than one-fourth as long as the fourth ; labrum semi- 

 circular, the central parts tumid, uneven and dense, the edges through- 

 out thinned and translucent ; antennae filiform, the joints elongate. 



Uiianiig 

 Maxillary palpi smaller, the second joint thick, nearly three times as wide 

 as the very slender fourth, third one-half longer than wide, a little thicker 

 than the fourth and less than one-half as long ; labrum as long as wide, 

 acutely parabolic, the edges throughout abruptly but very narrowly 

 thinned and translucent ; antennae short, gradually incrassate, the outer 



joints not longer than wide Artocllia 



Maxillary palpi filiform, the second joint not much thicker than the third 

 or fourth, the second two to nearly three times as long as wide and 

 one-half as long as the fourth or somewhat less ; labrum short, broad, 



