38 WILLIAM J. FOX. 



A NEW GENUS OF EARRID^. 



BY WILLIAM J. FOX. 

 DIPEOPEECTKON geu. nov. 



Head broader than the thorax ; mandibles bidentate at apex, the 

 outer tooth by far the longest, the outer margin is incurved medially, 

 or very slightly emarginate, in the S the mandibles are shorter, 

 broader and the outer margin seems to be entire. Eyes converging 

 towards the vertex, so that the distance between them at that })oint 

 is about equal to half of that at the mandibles; ocelli round, convex, 

 and situated so as to form a rather high triangle. Antenna? situated 

 very low down, the middle lobe of clypeus extending up between 

 them, rather long, very slightly thickened medially (the thickening 

 is more obvious in the % ) and narrowed to apex, alike in both sexes, 

 i e., those of the % are not formed into a spiral as in Dijietm. Pro- 

 thorax large and very prominent, not emarginate above, and the an- 

 terior portion is not cut off so suddenly as in most of the allied 

 genera ; when compared with the dorsulum it is fully two-thirds as 

 long; metathorax longer than the dorsulum, with no distinct en- 

 closure. Anterior wings with an extremely short marginal cell, 

 which is broadly truncate at apex, and has a long and distinct ap- 

 pendiculate cell. There are three cubital or submarginal cells, the 

 first of which is longer than the two others combined, the second 

 submarginal cell is triangular; the first and second recurrent ner- 

 vures are received by the first and second submarginal cells respec- 

 tively, as in Dinetus. Anterior tarsi of 9 with a comb formed of 

 long, slender, widely separated spines ; the % has no tarsal comb ; 

 middle tibise of both sexes with two spurs. Last dorsal segment of 

 9 with an elongate-triangular pygidium. 



While not closely allied to any described genus, it should be placed, 

 in my opinion, after the genus Dinetus, according to Kohl's arrange- 

 ment of the genera. DipbplectroW hns been formed for the reception 

 of Liris (?) hrunneipes Cress, from Colorado and Nevada. 



