

Fossorial ITymcnoptera of North America. 103 



broad. Eyes prominent globose, more so than in C. parvulus; ocelli 

 larger and more closely arranged in a equilateral triangle, on a more 

 than usual convex vertex ; surface of head more coarsely punctured 

 and eyes a little more contiguous than in G. parvulus, so that the front 

 is narrower than usual ; no raphe leads from anterior ocellus to the 

 antenna! groove which is deep, and the orbits are narrowly lined with 

 a slight silvery pubescence ; in front the head narrows rapidly towards 

 the insertion of the mandibles, and the clypeal region is consequently 

 narrow, the clypeus itself long and narrow, slightly carinated especially 

 towards the base, but surface rather flat, front edge much produced, 

 obtusely pointed ; tip small truncated, surface covered with a bright 

 silvery pubescence. Mandibles long, slender, smooth, highly polished, 

 nearly equally and very acutely bidentate. Antennae rather stout and 

 thick, scape dilated, yellow beneath, basal half black ; flagellum black, 

 basal joint slightly ferruginous, sutures well defiued. 



Prothorax well carinated on each side of the broad mesial notch, 

 black ; tubercle yellow, central raphe and submesial ridges on meso- 

 scutum well marked. The thorax is rather coarsely puncto-striated for 

 species belonging to this section, a narrow yellow stripe on the meta- 

 scutellum. Enclosure on the propodeum distinct, sublimate, with a 

 broad, flat and shallow mesial furrow, including irregular diverging 

 and transverse lines; on each side of the furrow are about five parallel 

 ridges; on the vertical face of the segment which is somewhat hexa- 

 gonal are transverse, slightly curved somewhat irregular lines; flanks 

 of thorax ridged coarsely and covered with soft silvery pubescence. 

 Tegulas blackish, wings slightly smoky, nervures dark ferruginous. 

 Fore femora, dark brown, tibiae brown within, externally yellow ; tarsi 

 pale brown, a little darker towards the ungues; middle femora tipped 

 slightly with yellow ; fore tibiae yellow externally, while the hind pair 

 are almost entirely yellow, stained with brown internally, and the sur- 

 face is finely pubescent and slightly spinulated; hind tarsi dark brown. 



Abdomen broadly ovate, slightly flattened, convex above and below 

 basal joint very broad, immaculate. Three pairs of lateral ovate yellow 

 fascias on second, third and fourth rings; on fifth and sixth they form 

 continuous bands on the front edge of each ring, slightly sinuate be- 

 hind. The first pair of fascire are larger, broader and more sinuate than 

 those behind. Beneath dark brown, edges of segments paler. 



Length of body, .28; head and thorax together, .16 ; abdomen, .12 

 inch. 



Penn., (Coll. Ent. Soc. Phil.). Maine, (Packard). 



