No. 22.] HYMENOPTERA OF CONNECTICUT. 615 



°D. nigrellus Brues. 



Black, except base and tip of antennae; femora below, knees 

 and tarsi rufous or yellow; marginal cell incomplete; palpi 

 black ; wings bifasciate. Length 4.25 mm. 

 °D. ormenidis Ashmead. 



Black; legs, except mid and hind tibiae, which are black, 

 rufous; marginal cell complete, palpi pale; wings bifasciate. 

 Length 4-4.5 mm. Parasitic on Ormenis pruinosa and O. sep- 

 tentrionalis. 



Chelogynus Haliday. 

 Key to Species. 



1. Thorax reddish atriceps 



Body entirely black 2 



2. Legs pale rufous 3 



Femora black, except tips of anterior pair grandis 



3. Clypeus pale or rufous henshawi 



- Clypeus black canadensis 



°C. atriceps Brues. 



Thorax reddish; head and abdomen black; mandibles 4-den- 

 tate ; metathorax coarsely reticulate ; legs rufous, the tarsi lighter ; 

 wings with two fuscous bands. Length 3.5-5 mm. 



°C. grandis Brues. 



Black; the legs in part yellow (fore and mid tibiae and all 

 tarsi); mandibles 4-dentate; metathorax finely rugulose; wings 

 with two fuscous bands. Length 7 mm. 



°C. henshawi Ashmead. 



Black ; antennae, legs, and clypeus pale rufous ; mandibles 4- 

 dentate; metathorax coarsely rugose; wings with two fuscous 

 bands. Length 4.5-5 mm. 



°C. canadensis Ashmead. 



Black; the mandibles and palpi white; legs pale rufous, the 

 pincers of the anterior tarsi very small. Length 2.5 mm. 



Aphelopus Dalman. 



A. americanus Ashmead. 



Black; legs honey-yellow. Length 1.5 mm. 



Waterbury, 29 July, 1884. 



