No. 22.] HYMENOPTERA OF CONNECTICUT. 55 1 



black. Wings fuscous, the base and a median band hyaline. 

 Length 1.5 mm. 



This species is thought to be parasitic on the eggs of certain 

 Aradidae. 



Acoloides Howa. J. 



°A. saitidis Howard. 



Entirely black. Legs and antennae honey-yellow, coxse black, 

 scape (in female) brownish. Male antennae uniformly honey- 

 yellow. Body opaque, closely minutely punctulate. Wings well 

 developed. Length 1.4 mm. 



Parasitic on the eggs of the spiders, Saitis pulex and Phidip- 

 pus morsitans. 



°A. emertonii Howard. 



Black, shining, but closely microscopically punctulate. An- 

 tennae brown-black, scape pale at extreme base. Legs, including 

 coxae, brownish yellow. Wings well developed. Length 1.4 mm. 



Aeolus Foerster. 



°A. zabriskei Ashmead. 



Black, polished, finely sericeous. Mandibles reddish, scape 

 honey-yellow, flagellum pale brown. Legs, including coxae, red- 

 dish yellow. Length i mm. 



Parasitic on spiders' eggs. 



Baeus Haliday. 

 °B. niger Ashmead. 



Black, shining, with a fine sericeous pubescence. Antennae 

 with the scape and flagelltun pale rufous or brownish yellow, the 

 club large and black. Length 0.7 mm. 



°B. americanus Howard. Howard, Insect Book, p. 51, 

 Fig. 26. 



Dark honey-yellow, the antennae and legs pale yellowish. 

 Abdomen fuscous. Length 0.8 mm. 



Bred from the eggs of an Epeirid spider. 



Prosacantha Nees. 

 , Key to Species. 

 I. Antennae in part rufous or pale 2 



