No. 22.] HYMENOPTERA OF CONNECTICUT. 295 



Synoecetes Foerster. 

 Key to Species. 



Face mostly black, clypeus yellow; thorax black; abdomen 

 and legs rufous; fore and mid legs paler; in male, trochan- 

 ters and coxae whitish; mouth parts and tegulse pale yellow, 

 antennae reddish; petiole of abdomen often dusky; wings 

 hyaline, veins and stigma brown. Length 6-7 mm. (female 

 and male) sedulus 



Face yellow; rest of head mostly black; antennae, legs, and 

 more or less of median dorsal abdominal segments, red- 

 dish; mouth-parts, scape beneath, tegulae, trochanters, fore 

 and mid coxae, whitish yellow; wings hyaline, veins and 

 stigma yellow. Length 7 mm. (male) propinquus 



S. sedulus Cresson. 



°S. propinquus Cresson. 



Provancherella Dalla Torre. 

 Baryceros Provancher. 

 °P. rhopalocera (Provancher). 



Male : length 8 mm. ; head and thorax black ; abdomen and 

 legs reddish ; face, scape beneath, mouth-parts, cheeks at base of 

 mandibles, tegulse, trochanters, and fore and mid coxae, yellowish 

 white ; antennae pale reddish, with the apical fourth dark brown ; 

 basal segment of abdomen and apex of hind femora and tibiae, 

 more or less black; the apex of the abdomen may be dusky; 

 areolet oblique, petiolate. 



Otlophorus Foerster. 

 °0. innumerabilis Davis. 



Female and male : length 4-8 mm. ; mostly black ; abdomen red- 

 dish, with its petiole black, and in some cases with the second and 

 apical segments dusky in the male; legs reddish; coxae, and in 

 some specimens the trochanters, tibiae, and tarsi of hind legs in 

 the male, dusky; tibiae at apex and hind tarsi in the female 

 slightly dusky; apical half of clypeus, mouth-parts, and tegulae, 

 reddish ; antennae black in the male, reddish brown in the female ; 

 areolet oblique, petiolate. 



°0. innumerabilis var. feria Davis. 



Differs from the typical form in the coxae being pale reddish 

 or yellow in the male, and in the abdomen being devoid of black 

 except on the basal segment. 



