88 Dr. A. S. Packard, Jr's Revision of the 



the remaining joints; hind femora entirely black; tibiae yellow, black 

 at tip, tarsal joint yellow, black at tip, as are the remaining joints. 



Abdomen fourteen-spotted, very black, on basal ring a pair of mi- 

 nute yellow dots; fasciae on the second ring much larger than the others 

 posterior to them, very approximate; posterior fasciae more remote, 

 especially those on the terminal ring; tip elongate spatulate. 



Length of body, .40; head and thorax, .22; abdomen, .24 inch. 

 Illinois, (Coll. Ent. Soc. Phil.). 



This rare species is very black, less hirsute than usual, and with an 

 unusual number of fasciae or spots on the abdomen, as the basal and 

 terminal segments are both spotted, the last being of rare occurrence in 

 the genus. Compared with C. singidaris, the head is more deeply ex- 

 cavated on the vertex, and in front still more so; the orbits are less 

 pubescent than usual, the abdomen is longer, the legs ferruginous and 

 black. 



Crabro oblongns, n. sp. 



9 . Closely allied to C. singidaris, head of much the same propor- 

 tions, but narrows a little behind, and is throughout narrower as the 

 entire body is. Eyes a little nearer together; the convexity of the 

 vertex and the grooving of the front the same as in C. singidaris. 

 Antennal groove well marked, polished, on each side a narrow edging 

 of silken pubesceuce; clypeus golden as in 0. singuJaris, but the hairs 

 are much finer, the lateral lobes are more triangular and silvery; man- 

 dibles black, with the middle wedge-shaped area twice grooved towards 

 the base, where in C. singidaris it is smooth; palpi slender, joints 

 much longer and slenderer by one-third than in the other species above- 

 named. Antennae as in C. singidaris, scape entirely yellow, hardly as 

 stout, joints of flagellum a little stouter. Two square, yellow spots on 

 the prothorax; lateral tubercle yellow; meso-thorax entirely black 

 above with no yellow markings; surface of the scutum finely striated ; 

 scutellum and meta-scutellum highly polished. Propodeum much as in 

 C. singidaris, but the mesial furrow widens at base, with similar lateral 

 and transverse rugae; legs colored much the same; within the hind 

 tibiae a dark stripe. Abdomen long, sides unusually parallel, giving 

 it an oblong slope; with ten yellow fasciae, those in the basal joint be- 

 ing simply dots, those in the second ring much larger than the suc- 

 ceeding ones, not wedge-shnped, but elliptical ; beneath very convex; 

 tip one-half as long as in C. singidaris, the enclosed triangular upper 

 surface much longer and narrower than in the allied species. 





