No. 22.] HYMENOPTERA OF CONNECTICUT. IO7 



male differs in lacking the rufous and in having the femora in 

 great part black. Length 9 mm. Larva feeds on white oak. 



New Haven, 1907 (A. D. Reid), 21 May, 1910 (A. B. C.) ; 

 Lyme 1 May, 1910 (A. B. C). 



Dineurin.e. 

 Key to Genera. 



Front wings with transverse part of M 2 interstitial with free 

 part of Rs; free part of Sci situated before the medio-cubital 

 cross-vein Mesoneura p. 107 



Front wings with transverse part of M 2 received in cell R 3 

 and never interstitial with free part of vein R 5 ; free part 

 of Sci interstitial with or situated beyond the medio-cubital 

 cross-vein Dineura p. 107 



Mesoneura Hartig. 

 *M. parva (Norton). Dineura parva Norton. 

 Body black, with the tegulse and the apex of the venter pic- 

 eous ; legs yellow-rufous ; wings hyaline, the veins brown ; an- 

 tennae filiform, third and fourth segments subequal; head without 

 depressions about ocelli ; clypeus truncate. Length 4 mm. 

 Farmington (E. N.). 



Dineura Dahlbom. 



Key to Species. 



1. Antennae with third segment longer than or subequal to 



fourth 2 



Antennas with third segment shorter than fourth; body black, 

 with legs beyond base of femora and apex of venter rufo- 

 testaceous; wings hyaline, iridescent, veins brown, costal 

 vein and stigma dull luteous. Length 5 mm. luteipes 



2. Mesonotum more or less marked with rufous; body black, 



with prothorax, tegulae, side lobes of mesonotum, pleurae, 

 legs, and apex of abdomen, rufous; wings hyaline, stigma 



pale, cell R 4 almost square. Length 5 mm linita 



Mesonotum wholly black; body black, with tegulae, collar, 

 large spot on pleurae, legs, apical half of tergum, and 

 apical two-thirds of venter, rufous; basal half of stigma 

 white ; cell R 4 longer than wide. Length 4.5 mm lateralis 



o 







o 



D. luteipes Cresson. 

 D. linita Norton. 

 D. lateralis Norton. 



