No. 22.] HYMENOPTERA OF CONNECTICUT. 389 



dark opaque brown ; head dull shining black ; thorax also dull 

 shining black ; legs pale but less so than in the female and inclin- 

 ing to yellow ; wings as in the female ; abdomen pedicelled, con- 

 colorous with the thorax and dull and shining. 



The type locality of this species is probably Connecticut. It 

 was found among the galls of Andricus prionosus. 



*N. exiguissimus Bassett. 

 Length 1.25 mm.; head black, antennas 13-jointed, first and 

 second joints black, the third to the thirteenth dusky brown, and 

 of equal length, the second joint larger than the first and ovoid ; 

 thorax smooth, scutel shining, with a curved groove, but without 

 foveae at its base, smoother and more polished than the meso- 

 notum ; legs dark brown with pale joints, tarsi dusky, elaws 

 black ; wings hyaline, veins pale, cubitus inconspicuous, the veins 

 bounding the areolet laterally hardly perceptible, radial area 

 open ; abdomen compressed, smooth and black. 

 Type locality : Waterbury, on Quercus alba. 



*N. exiguus Bassett. 



Female: length 1.5 mm.; antennae 13-jointed, first joint ovate, 

 second much smaller than the first, third equal to the first two 

 combined, which are of uniform length, color clear semitrans- 

 parent brown; thorax polished, very black, its surface wrinkled, 

 scutel rounded, shining black, as is also the transverse groove at 

 its base, this groove large and incurved ; legs dark clear browa 

 but paler at the joints ; wings smoky and pubescent, veins dis- 

 tinct, cubitus reaching quite to the first transverse vein, radial 

 area open by virtue of a curvature in the second transverse vein 

 at the base of the areolet, the outer angle acute and the inner a 

 right angle ; abdomen black but less brilliant than the thorax, and 

 triangular owing to the retraction of all segments within the 

 first. Male : as long as the female ; mostly black ; antennae clear 

 brown, 15-jointed; legs concolorous with the antennae though a 

 little paler at the joints ; abdomen petiolate, shining brown. 



Type locality : West Rock, New Haven. Found among galls 

 of Andricus exiguus. 



*N. tectus Bassett. 

 Female: length 1.25 mm.; head black; antennae i3-jointed, 

 third joint equal to the first and second combined, fourth two- 



