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



quadrate in form, a high ridge separating the anterior from the pos- 

 terior area of the scutellum; the vertical posterior portion is low mitre 

 shaped, divided by the mesial furrow, enclosed by high ridges and 

 traversed by four slight ridges obliquely directed upwards. Sides of 

 the thorax lineated by raised lines, tubercle smooth yellow. Tegulae 

 black, nervules unusually dark, wings slightly clouded, irridescent. 

 Femora black, slightly tipped with yellow, especially on the fore legs; 

 fore and middle tibiae yellow, with an oval spot within, on the hind 

 tibiae a slight brown stain ; tarsi brown thoughout. 



Abdomen black, with four pairs of lateral, broad, ovate, non-sinuate 

 yellow spots beginning on the second ring, last pair not contiguous as 

 usual; tip much as in C. cubicej>s, though narrower and deeply 

 grooved. 



Length of body, .30; head and thorax together, .17; abdomen, .13 

 inch. 



Western Virginia, (Mr. Ridings, Coll. Ent. Soc. Phil.). 



This interesting, and in some respects peculiar, species is closely 

 allied to C. cubiceps, though differing in the remarkable sculpturing 

 of the metathorax; in the narrow pr^thorax which is unusually long; 

 in that, the last pair of fasciae on the abdomen are unusually distant, 

 being placed far down on the base of the ring. The prothorax in this 

 group is usually broad and thin and well crested, but in the present 

 species it presents a broad slightly channelled surface. The punctures 

 are unusually fine, the surface of the head and thorax being smooth 

 and almost polished. The surface of the anterior part of the meso- 

 scutum enclosed between the submesial ridges, are more than usually 

 hollowed out. In its few large corrugations or ridges on the meta- 

 thorax it will be readily distinguished from its allies. 



Crabro parvulus, n. sp. 



$ . Head very cubical, almost square above, vertex broad, full and 

 convex, front full, not channelled, a slight impressed line in front of 

 the median ocellus; ocelli arranged in a low triangle. Eyes not far 

 apart as usual in front; antenual groove deep, bounded above by a 

 slight rim, on each side orbits lined with a silvery pubescence. Cly- 

 peal region silvery, head in front narrows rapidly towards the inser- 

 tion of the mandibles. Clypeus broad and short, one-half as long 

 as broad, tip broadly truncate, surface flattened, with a well marked 

 carina. Mandibles black, with a pale yellow, ovate, lanceolate, mesial 

 spot. Antenna) rather thick, clavate, scape unusually thickened to- 

 wards the tip, black, tip yellow, streak extending downwards on the 



