UHLER ON INSECTS. 373 



enable the stadeut to recognize it at first sight. Its general affinities 

 seem to be with yEthus as understood by Mr. Dallas, but more m'.nute 

 examination of its details readily shows its distinctness from any genus 

 hitherto established. 



MiCROPORUS Uhler. 



Ovate or oval, broad, round, deep, hairy, polished. Head broadly 

 rounded, feebly convex, the tylns shorter than the lateral lobes ; 

 submargin closely set with short, stout teeth and long bristles, the edge 

 sharp, recurved, broad beneath. Autennse, basal joint barely reaching 

 the tip of clypeus ; second very short, only a little more than one- 

 half the length of the third; the third more slender, fusiform, shorter 

 than the basal, but about of the same length as the fourth ; fourth and 

 fifth stouter, rounded at each end, subequal. Rostrum reaching be- 

 tween the intermediate coxae, the second joint longest, compressed, 

 arched above, a little curved; third and fourth joints subequal, each a 

 little shorter than the basal one, the bucculce narrow, a little arched an- 

 teriorly, protracted narrower almost to the' base of the head. Prono- 

 tum transverse, the transvere impression indistinct, the surface arching 

 in conformity with the curve of the head, the anterior angles a little 

 produced, rounded, the anterior margin deeply sinaated, thelateral mar- 

 gins fringed with long ciliai. Anterior femora compressed, armed with 

 stout spines on the outer and inner edges, those of the tip longest. Os- 

 tialar caaal short, placed very near the sterau-n, the inner end a t.ipar- 

 iug ridge, the outer end a rounded button sunken in the center. Scu- 

 tellum about two thirds as long as the abdomen, bluntly triangular, 

 wide, and rounded at tip, the aitex a little bent down. Corium short 

 and wide, the outer angle produced backward, the epipleura long, 

 grooved. Outer margins of the venter compressed. 



1. M. ohliquus. 



Microporus ohliquus Uhler, Filth Aud. Rep. U. S. Geo). Surv. for 1871, 1372, p. 

 394. 



Chestnut-brown, polished, subovate, the lateral margins of pronotum 

 and corium fringed with long ferruginous hairs. Face almost flat, each 

 side with long, oblique, punctured stri;e ; the tylus transversely and 

 less distinctly grooved ; anterior margin bluntly rounded, the submar- 

 gin thickly set with short, stout teeth, and with a few long bristles be- 

 tween them ; the lateral lobes sparingly punctate, with a round fovea 

 adjacent to each eye, and another near the tip, each side of the tylus. 

 Rostrum yellow, extending to the intermediate coxos, the apical joint 

 slender, a little shorter than the third, the third gradually widened 

 toward the tip. Basal aud next joint of the antennne slender, the 

 second shortest, third, fourth, and fifth moniliate, narrowed at the 

 ends, the apical one a little longer than the fourth, the third and fourth 

 subequal. Base of the head convex, impunctate. Pronotum trans- 

 verse, the lateral margins oblique, densely ciliate with ferruginous 

 bristles, the anterior angles a little advanced, rounded ; anterior divis- 



