14 U. S, NATIONAL MUSEUM BULLETIN 2 09 



Second flagellar segment about 2.4 as long as wide; forewing about 10 to 15 

 mm. long, strongly infuscate; head and body a little more densely and more 

 finely punctate; dorsal face of pronotum a little longer . 2. fortis (Cresson) 



3. Forewing orange except at the base and apex 4 



Forewing infuscate or black, or black with a median orange spot 6 



4. Temple about 0.4 as long as the eye; second flagellar segment about 4.4 as 



long as wide 3. deceptus (Banks) 



Temple about 0.65 to 1.2 as long as the eye; second flagellar segment about 

 2.5 to 3.5 as long as wide 5 



5. Propodeum above with coarse transverse wrinkles; coarse punctures on sternites 



separated by about 4.0 their diameter; bases of wings infuscate nearly to the 



apex of the anal lobe (pi. 1, fig. 1) 4. pyrrhotnelas (Walker) 



Propodeum nearly or quite without wrinkles; coarse punctures on sternites 

 separated by about 1.7 their diameter; bases of wings infuscate only at the 

 extreme base 6. hciligbrodtii (Cresson) 



6. Forewing with a large median orange spot (pi. 2, fig. 15) ; abdomen entirely 



black 5. maculipennis (Smith) 



Forewing entirely black 7 



7. Third tergite entirely black 7. feroculis (Banks) 



Third tergite mostly or entirely brownish red 8. validus (Cresson) 



ALBOPILOSUS GROUP 



Head and body shiny, with well separated setiferous punctures and 

 with the clothing hairs not unusually dense and fine; anal lobe about 

 0.55 as long as the submediella ; fifth tarsal segment without discal 

 bristles beneath; all tarsal claws of both sexes with a small erect 

 median tooth; teeth on outer side of hind tibia of female showing as 

 faint elevations at the bristle bases; male abdomen without a con- 

 striction between the first two tergites; male subgenital plate various, 

 but never spherically concave with a fimbriate margin. 



The species included are the Nearctic albopilosus and fortis. The 

 New Zealand Pompilus monachus Smith, 1855, seems the nearest 

 relative of this species group. 



1. Chirodamus albopilosus (Cresson) 



Pompilus {Agenia) albopilosus Cresson, 1867, Trans. Amer. Ent. Soc. vol. 1, p. 



125, cf. Lectotype: cf , West Virginia (Philadelphia). 

 Priocnemis fortella Banks, 1915, Canadian Ent., vol. 47, p. 401, [9]- Lectotype: 



9, Great Falls, Va., June 12, N. Banks (Cambridge). 

 Pseudagenia najacra Brimley, 1928, Journ. Elisha Mitchell Sci. Soc, vol. 43, p. 



203, cf . Type: d^, Raleigh, N. C. (Raleigh). 



Male: Forewing 6 to 8 mm. long; subgenital plate broadly ligulate, 

 with the apex subtruncate and the lateral edges raised; genitalia not 

 ordinarily visible beyond the subgenital plate. 



Black. Pubescence light gray, the longer hairs on the head and 

 scape blackish; wings subhyaline, the apical half of the forewing 

 lightly infuscate. 



Female: Forewing 6.5 to 10 mm. long; head and body with rela- 

 tively sparse and coarse punctures; second flagellar segment about 



