22 STREPSIPTERA 



4. Subgenus AUGOCHLOROPHILUS, nov. subgen. 



Type of subgenus. — H. viridulae, Pierce. 



Geographical distribution of species. — Parasites of bees of the genus Augocklora. 



ii. H. viridulae, Pierce, Proc. U. S. Nat. Mus. Vol. 40, p. 496 (igri), Illinois. 



2. Genus APRACTELYTRA, Pierce 



Apractelytra. Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. 79 (1908); Bull. U. S. Nat. Mus. no. 66, 

 pp. 1 5 1 , i52 (1909). 



Characters. — Male. — Head transverse, eyes not very prominent. Mandibles short, acute, 

 slightly curved; maxilla? two-jointed, second joint more slender than first, but subequal in length. 

 Antennae compact, four-jointed, with third joint laterally produced. Prothorax and mesothorax trans- 

 verse. Metathorax elongate; praescutum broader in front than behind, posterior edge with angular 

 projection; scuti widely separated; scutellum elongate, twice as long as praescutum, sides narrowing 

 toward front, but not becoming approximate; postlumbium very long; postscutellum elongate, apically 

 narrowly rounded. CEdeagus not strongly arcuate beneath at middle, slender, tube-like, not inflated, 

 bent at apical third at a right angle, apex abruptly acute. 



Female unknown. 



Type of genus. — A. schwarzi, Pierce. 



Geographical distribution of species. — Hosts unknown. 

 1. A. schwarzi, Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. 83 (1908); Bull. District of Columbia. 

 U. S. Nat. Mus. no 66, p. i52, pi. 10, ff. 3-6 (1909). — PI. 4, 

 Fig. 22. 



2. SUBFAM. CRAWFORDIN/E, PIERCE 



Crawfordinae. Pierce, Proc. Ent. Soc. Wash. Vol. 9. p. 78 (1908); Bull. U. S. Nat. Mus. no. 66, 

 p. i52 (1909). 



Characters. — Male. — Maxillae three-jointed. Metathoracic scutellum posteriorly broadly 

 truncate, not pedunculate, postlumbium more than half as long as wide. CEdeagus beginning as a 

 slender tube, then greatly inflated, bent at right angles, and produced as a very slender process. 

 Female. — Cephalothorax broad, trapezoidal, broadly truncate at apex 

 The subfamily includes only one genus, which is parasitic on bees of the family Panurgidae. 



I. Genus CRAWFORDIA, Pierce 



Crawfordia. Pierce. Proc. Ent. Soc. Wash. Vol. 9, p. 80 (1908); Bull U. S. Nat. Mus. no. 66, 

 p. i53 (1909). 



Characters. — Male. — Head and eyes normal. Mandibles lancet-shaped, slender, toothed near 

 tip, apically obliquely truncate; maxillae apparently three-jointed, third joint very large. Antennae four- 



