No. 22.] HYMENOPTERA OF CONNECTICUT. 65 



lum (sometimes white), legs beyond apices of coxae except a 

 ring on apices of posterior femora and tibiae, and abdominal 

 segments one to four, with sometimes a spot on the disk of 

 fifth ; antennae varying from yellow to rufous and black ; third 

 segment almost twice as long as fourth ; segments beyond third 

 distinctly serrate; head and thorax deeply, closely punctate; 

 saw-guides with upper and lower margins parallel and oblique- 

 ly roundly truncated at apex. Male differs in having scutellum 

 and postscutellum black and entire abdomen beyond basal 

 plates rufous or infuscated and almost entirely black. Length 

 9-1 1 mm. Larva feeds on birch, basswood, Amelanchier, and 

 maple. 



Connecticut (E. N.). A larva feeding upon sweet cherry at 

 New Haven was identified as this species by Dyar. The same 

 species was received from Harwinton, 16 August, 1902. New 

 Britain, 4 August, 1906 (W. E. B.). 



Selandriin^e 

 Key to Genera. 



1. Front wings with first abscissa of Cui distinctly longer than 



free part of M<; costa dilated at apex 2 



Front wings with first abscissa of Cm subequal in length to 

 free part of M; costa not dilated at apex 4 



2. Claws simple, without a tooth at base; front wings with media 



strongly angularly bent at base Selandria p. 66 



Claws with a minute erect tooth at base; front wings with 

 media not strongly angularly bent at base 3 



3. First anal cell of hind wings closed at wing margin and there- 



fore distinctly longer than the cell in front of it; front 

 wings with media coalescing with radial sector for a short 



distance Polyselandria p. 66 



First anal cell of hind wings distinctly petiolate and there- 

 fore shorter than the cell in front of it; front wings with 

 media separating from radius distinctly before origin of 

 radial sector Pseudoselandria p. 66 



4. Claws strongly appendiculately dentate Stromboceros 



Claws not appendiculately dentate 5 



5. Claws with a minute erect tooth at base Thrinax p. 67 



Claws strongly bifurcate at apex Strongylogaster p. 67 



