No. 22.] HYMENOPTERA OF CONNECTICUT. 551 



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 Howard. 

 A. saitidis Howard. 



Entirely black. Legs and antennae honey-yellow, coxae 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, fiagellum pale brown. Legs, including coxae, red- 

 dish yellow. Length 1 mm. 



Parasitic on spiders' eggs. 



Baeus Haliday. 



B. niger Ashmead. 



Black, shining, with a fine sericeous pubescence. Antennae 

 with the scape and fiagellum 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. 

 1. Antennae in part rufous or pale 2 



