Fussorial Uymcnoptera of North America. 85 



men will distinguish it sufficiently from C. dilcctus, aside from its 

 much larger size. 



Another specimen from Pennsylvania, has the basal fasciae very 

 contiguous, and on the end of each band is deeply excavated. 



Crabro Packardii, Cresson. /\Z^-^o8~ 



a Packardii, Cress., Proc. iv. p. 477. (1865.) /Q>/ 0° 



Col. Terr., (Coll. Ent. Soc. Phil.). j^j± "*•' 



Crabro dilectus, Cresson. jjjj [LIB 

 C. dilcctus, Cress., Proc. iv. p. 47S. (1865.) 



Col. Terr., (Coll. Ent. Soc. Phil.). 



Group D. >T/i/ 



Crabro quadrangularis, n. sp. 



$ . Head of the same proportions as in C. singular is, very finely 

 punctured, smooth and shining; antennal groove broad and deep; or- 

 bits silvery; clypeal region as in G. singular is ', scape yellow, flagel- 

 lum black, not quite so slender as in C. singularis. Two square, 

 yellow, remote spots on its prothorax ; meso-scutum more coarsely stri- 

 ated than in G. singularis; a yellow stripe in scutellum and post-scu- 

 tellum. Enclosure of propodeum with the mesial groove but little 

 larger than the lateral grooves which are crossed by the diverging 

 ridges ; posteriorly on the flanks a net-work of coarse rugae. Wings 

 as in C. singularis. Fore femora black, ferruginous at tip above; tibiae 

 yellow, with a ferruginous line within; tarsi yellow, ferruginous to- 

 wards the ungues. Middle and hind femora black, a yellow dot above 

 at the tips of middle femora; tibiae yellow, within black-brown; first 

 joint of tarsi yellow, black at tip, terminal joints black. 



Abdomen much larger and narrower in proportion than G. singu 

 laris, not so convex beneath; with eight remote straight not sinuate 

 fasciae, none on the last ring. The fasciae do not decrease in length 

 and size from the tips, and they differ from those on G. singularis in 

 being more obtuse above; the tip is much mere produced, the lateral 

 ridges bordering the triangular surface become obsolete towards the 

 base, and on the succeeding ring is a smooth, triangular area, only no- 

 ticed in this section of the genus. 



Length of body, .66 j head and thorax, .82; abdomen, .3-i inch. 



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



This is not only longer and larger, with the abdomen narrower in 

 proportion than in G. singularis, but is more finely punctured and stri- 

 ated, and blacker, with no spots or lines on the meso-thorax, while the 

 abdomen is eight-spotted, with the fasciae even in size, and ovate lan- 

 ceolate, not narrow wedge-shaped. Both will be easily distinguished 



