Fossorial Ui/mcnojptera of North America. 83 



guise aud nervures paler than usual, testaceous, cither a stripe or two 

 remote yellow Bpota just in front of meso-scutuni on the lateral prolon- 

 gation (these spots are in another specimen absent); a yellow stripe 

 on the scutelhun ; metathorax coarsely puncto-lineated, enclosure dis- 

 tinctly sublimate ; the mesial furrow indistinct, as large, high closely set 

 rugae diverge in curved lines, becoming transverse and more numerous 

 and finer posteriorly, where the thorax is more hairy than usual. An- 

 terior femora yellow, with an obtuse spine at base, black at base above; 

 tibia' and tarsi yellow, terminal joints glaucous; middle and hind femora 

 black, yellow above towards tip, with a black stripe within, which is 

 longer on the middle joint; tarsi yellow, towards ungues glaucous fer- 

 ruginous. 



Abdomen with convex joints, distinct sutures, finely punctured, with 

 three pairs of transverse sinuate fasciae on the three basal joints, on 4th— 

 6th rings, a narrow continuous band, situated on the hinder edge of 

 each ring; basal fasciae rounded within, suddenly narrowiug on the 

 sides ; tips broadly spatulate, acute. Beneath, the joints of the abdomen 

 are ferruginous at the edge. 



9 . Differs in having the front more golden, especially the clypeus; 

 Antenna? long clavate, sutures becoming more distinct towards the 

 tips, second and third joints next to terminal one of flagellum beinc 

 dentate, a long yellow spot behind the yellow tubercle, base of pro- 

 podeum coarsely striated, most of its surface is finely striated and com- 

 paratively smooth, and the enclosure is posteriorly finely striated; 

 second sub-median recurrent is more transverse than in the % . Legs 

 darker; fore and middle femora black, reddish yellow at tips; inside 

 of tibiae, yellow; hind pair entirely black, tibiae streaked with dark 

 brown within. Abdomen as in S , tips broad triangular, slightly chan- 

 nelled, convex at base; tips hirsute. 



Length of body, % , .44 — .48, 9 .56 ; head and thorax together, % , 

 .26, 9 , .30 ; abdomen, % , .22, 9 , .26 inch. 



Maine, (Packard); Mass., (Sanborn, Coll. Harris); Canada, (Coll 

 Phil. Ent. Soc.); "Indiana; Hudson's Bay," (Smith). 



This species will be easily recognized by the % subtrapezoidal head, 

 the 9 denticulate antenna?, the golden clypeus of 9 as distinguished 

 from the silvery sides of clypeal region, the geminate yellow spots on 

 the flanks, the ten fasciae of % , which on the last three rings become 

 continuous yellow bands. The 9 is broader and stouter than in the 

 other species of this section. 



Say's C. arcuatus must be united with St. Fargeau's C. chrysarginus, 



