No. 22.] HYMENOPTERA OF CONNECTICUT. 385 



tips of the tarsi, which are black, of the same color as the coxae ; 

 wings hyaline, all the veins dark brown and of nearly equal size, 

 the cubitus distinct throughout, radial area open ; abdomen 

 polished. Male: a little shorter than the female, with 4-jointed 

 antennae; its legs dull pale yellow; abdomen petiolate, owing to 

 the elongation of the first segment. 



Found on twigs of Quercus alba. 



New Haven, 24 January, 191 1 (A. B. C, B. H. W.). 



*N. majalis Bassett. 



Female : length 2 mm. ; head black, very finely reticulated ; 

 face smooth and with sparse white hairs ; mouth brown, tips of 

 the mandibles black; antennae 13-jointed, first and second joints 

 short, third joint very long and enlarged at the upper end, these 

 joints, except the slightly enlarged portions of the third, pale 

 yellowish white, the remaining joints of a light opaque brown ; 

 thorax black, smooth and shining, without any grooves or striae 

 whatsoever on the mesonotum; scutel smooth, and separated 

 from mesonotum by a broad shallow groove, fovae wanting, 

 marked posteriorly by two deep transverse grooves, causing three 

 transverse ridges above the insertion of the abdominal petiole; 

 legs white, with a tinge of yello.w like the basal joints of the 

 antennae; wings large, with a faint duskiness and a dusky cloud 

 on the first transverse vein, veins dull brown, areolet present, 

 radial area open, long and very narrow ; abdomen smooth and 

 black. Male : 2.5 mm. long ; head blaek ; antennae 15- jointed, first, 

 second and third joints paler than the corresponding ones in the 

 female, the remaining joints of a semitranslucent brown color, 

 the third joint very long, the succeeding ones short and of equal 

 length, the third joint curved rather than incised ; thorax with the 

 legs very light yellowish brown, the central part of the mesonotum 

 dark brown ; abdomen with its terminal segments dark brown or 

 nearly black, the first and part of the second segments very light 

 yellowish brown. 



The gall of this species occurs on Quercus alba. 



Type locality : Waterbury. 

 °N. verrucarum Osten Sacken. 



Length a little more than i mm. ; mostly black and shining ; 

 mouth reddish; antennae 13-jointed, somewhat thickened toward 

 the tip, brownish or brownish black, pale toward the base, espe- 

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