134 NEW YORK STATE MUSEUM 



Key to Species 

 a Legs very slender with a length two and one-half or three times that of the 

 body; tibiae distinctly though slightly swollen apically 

 h Posterior tibia as long as the femora, the second tarsal segment longer 

 than tibia; body fuscous, the abdomen thickly clothed with pale 



hairs hamamelidis Felt, C. 401 



hh Posterior tibia shorter than the femora 



c Abdomen dark brown; scutellum reddish brown 



marginata Felt, C. 1224 



cc Abdomen reddish brown ; scutellum light brown 



f u 1 V a Felt, C. 530 



ccc Abdomen reddish brown ; scutellum light yellow 



recurvata Felt, C. 825 

 cue Abdomen yellowish orange; scutellum yellowish . . .rosivora Coq. 

 aa Legs rather stout, with a length rarely twice that of the body; tibiae not 

 distinctly swollen apically 

 h Posterior tibia nearly as long as the femora 



c Second tarsal segment of posterior legs longer than the tibia. Abdo- 

 men reddish brown; scutellum pale yellowish brown, legs yellow- 

 ish brown meridionalis Felt, C. 1005 



cc Second tarsal segment of posterior legs almost as long as tibia; 

 abdomen grayish, thickly haired; scutellum yellowish; legs light 



brown cucumeris Lintn. 



hh Posterior tibia three-fourths the length of femora 



c Second tarsal segment of posterior legs longer than tibia and first 

 tarsal segment 

 d Abdomen pale reddish orange; scutellum yellowish basally, 



red apically; legs fuscous yellow f 1 a v i d a Felt, C. 666 



dd Abdomen fuscous yellow; scutellum light fuscous yellow; legs 



light brown borealis Felt, a 1 1 60 



cc Second tarsal segment of posterior legs as long as tibia and the first 

 tarsal segment 

 d Third tarsal segment of posterior legs one-half the length of the 

 second. Abdomen dark reddish brown; scutellum reddish 



orange marina Felt, C. 581 



dd Third tarsal segment of posterior legs more than one-half 

 length of second segment. Abdomen yellowish brown, the 



basal segment fuscous brown, scutellum yellowish red 



b a s a 1 i s Felt, ai722 



Aphidoletes hamamelidis Felt 



1907 Felt, E. P. N. Y. State Mus. Bui. no, p. 125; separate, p. 29 (Bremia) 



1908 — — • N. Y. State Mus. Bui. 124, p. 397 



The male was taken June 27, 1906 on witchhazel, H a m a m e li s 



V i r g i n i a n a, at Albany, N. Y. 



Male. Length 1.5 mm. Antennae longer than the body, thickly 

 haired, fuscous; 14 segments, the fifth with stems twice and three 

 times their diameters; terminal segment, distal enlargement pro- 



