No. 22.] HYMENOPTERA OF CONNECTICUT. 561 



trochanters and tarsi whitish. Wings hyaline, with a fuscous 

 band beneath the stigma. Length i mm. 



. °A. marylandicus Ashmead. 



Polished black. Antennae black. Legs dark brown, paler at 

 the tips. Wings entirely hyaline. Length i mm. 

 °A, pallidipes Ashmead. 



Shining black. Antennae brownish yellow. Legs pale yellow. 

 Wings clear hyaline, the nervures brown, the stigmal vein only 

 a little longer than the marginal and but slightly curved. Length 

 0.8 mm. 



DIAPRIID^. * 



The present family is very similar in appearance to the follow- 

 ing, but may be usually distinguished by the entire absence of a 

 basal cell in the hind wings. The front wings are less distinctly 

 veined, lacking the marginal cell so prominent in most Belytidae. 

 The antennal prominence is also usually less evident and the 

 antennae of the females more incrassated. 



Key to Genera. 



Females. 



1. Wings normally developed 6 



Wings abbreviated or absent 2 



2. Antennae 13-jointed 3 



Antennae 12-jointed • • S 



3. Antennae with an abrupt 4-jointed club Basalys p. 568 



Antennae without an abrupt club 4 



4. Abdomen more or less rounded at apex and depressed; base 



of second abdominal segment raised dorsally above the 



petiole, without impression Spilomicrus p. 564 



Abdomen ending conically and compressed; base of second 

 segment not raised above the petiole Paramesius p. 563 



5. Club of antenna abrupt, 3-jainted Loxotropa p. 565 



Club of antenna s-jointed or antennae not distinctly clubbed 



Aneurynchus p. 564 



6. Wings emarginate or truncate at the tip Entomacis p. 563 



Wings rounded at the tip 7 



7. Antennae 13-jointed 8 



Antennae 12-jointed 11 



8. Subcostal vein not exceeding the basal third of the wing .... 



Basalys p. 568 

 Subcostal vein exceeding the basal third of the wing 9 



36 



