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



ridges are nearly obsolete ; surface rather finely punctured ; scutellum 

 with a mesial yellow ovate spot. Enclosure of propodeum with high, 

 thin ridges of unequal length, radiating from the mesial furrow, which 

 is unusually deep and narrow; posteriorly the rugae become transverse 

 and finer. Fore femora black, above yellow, with a ferruginous stripe 

 inside; tarsal joint yellow, tip and remaining joints ferruginous; mid- 

 dle and hind femora black, tibite yellow, black at tip, with numerous 

 thick tubercles ending in the spinules; joints much thicker and 

 stouter than usual, tip of basal joint and terminal ones rusty black. 



Abdomen long and flattened above, beneath convex, with two large 

 sinuate yellow bands on the basal ring, two long, ovate faseias on the 

 two succeeding rings; on the fourth ring the bands nearly meet; on the 

 fifth ring is a broad band, not indented on the median line, but sinuated 

 at each end on the side of the abdomen. Tip broad and flat, spatulate, 

 edges hardly raised, ferruginous. Beneath are two broad, large fasciae 

 on the second ring; edges of the terminal segments hirsute on the 

 sides. 



Length of body, .58 ; head and thorax, .28; abdomen, .30 inch. 



"Pinkhani Notch. Jackson, N. H.," Aug. 3. (Coll. Harris). 



Differs from the succeeding species not only in its unusually larger 

 size, its smoother, more transverse head, smaller eyes, consequently 

 farther apart, but also in having the ocelli arranged in a low triangle 

 or curved line, with long antennae, thickened scape, together with the 

 large, yellow fasciae on the under side of the second segment of the 

 abdomen. 



Thyreopus advenus. Pack. 



Crabro advenus, Smith, Cat. Hym. Br. Mus. iv. p. 421. (1S5(5). 

 Specimens from Connecticut agree in most respects with Colorado 

 specimeus, but the fore femora are not so broadly tipped with yellow, 

 nor are the abdominal fasciae quite so heavily marked. In one speci- 

 men, apparently immature, the fasciae are greenish yellow; the meso- 

 scutellum is entirely black, the body a little shorter and broader than 

 usual, and the propodeum has the enclosure more finely striated at the 

 base than in the other specimens, wherein the Western specimens all 

 differ from those taken in New England. 



Tn the very minute fasciae on the basal joint of the abdomen, this 

 species reminds us of the coloration of Philanthus ', this resemblance 

 is aided by the short, broad head and slender form. 



This will ultimately be referred to some one of the species ( % ) no- 

 ticed before. Probably one of the three allied to vicina, will here- 



