568 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



2. Antennae, except club, reddish virginica 



Antennse entirely piceous or black 3 



3. Legs entirely reddish yellow haematobiae 



Legs rufous; coxae, femora, and tibiae fuscous minutissima 



P. minutissima Ashmead. 



Polished black. Antennae piceous, with rufous scape. Coxae, 

 clavate part of femora, and tibiae piceous. Wings hyaline, the 

 stigma piceous. Length 0.9 mm. 



P. haematobiae Ashmead. 



Shining black. Antennae piceous, with rufous scape. Legs 

 uniformly reddish yellow. Cheeks each with a tuft of grayish 

 woolly pubescence. Length 0.8 mm. 



Parasitic on the horn-fly {Hcematobia serrata). 



P. virginica Ashmead. 



Polished black, impunctate. Antennae, except club, and legs 

 reddish yellow or yellowish. Cheeks behind, collar, and petiole 

 woolly. Metathorax pubescent. Wings hyaline, fringed; the 

 stigma long, brownish. Head thick, globose. Length 1.1 mm. 



P. schwartzii Ashmead. 



Polished black. Antennae, except club, and legs reddish yel- 

 low or yellowish ; club fuscous. Wings hyaline, the stigma yel- 

 lowish. Length 1-1.2 mm. . 



Basalys Westwood. 



B. fuscipennis Ashmead. 



Polished black. Cheeks and collar with dense gray wool. 

 Antennae, legs, and petiole brownish yellow. Wings fuscous, 

 marginal vein piceous, with a cloud below its tip. Length 2.7 

 mm. 



BELYTID^. 



Head transverse or subglobose, with the 14- or 15-jointed 



antennae inserted on a frontal prominence. Wings with a closed 



costal cell, basal cell, and usually a marginal cell. Hind wings 



always with a basal cell. Abdomen petiolate. Wingless forms 



rare. 



Key to Genera. 



Females. 



I. Antennae 15-jointed 2 



Antennae 14-jointed Anectata p. 573 



