AQUATIC INSECTS IN THE ADIRONDACKS 589 



yellowish; areolet open, the submedian cell a little longer than the 

 median. Abdominal petiole about twice as long as the hind coxae, 

 bifurrowed and subcoriaceous above. 



Type. Cat. no. 5316, U. S. national museum 



Habitat. Saranac Inn N. Y. 



Host. Diptera: Sepedon fuscipennis Loew, Bred Aug. 24, 

 1900, from a puparium of Sepedon fuscipennis Loew, by Prof 

 James G. Needham. 



This species comes very close to the European Atractodes 

 gravidus Haliday; but is readily distinguished by a slight difference 

 in color and by decided differences in antennal and metathoracic 

 characters. 



