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 

 b 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 



bb 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 

 cccc Abdomen yellowish orange; scutellum yellowish . . . r o s i v o r a Coq. 

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

 distinctly swollen apically 

 b 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 c u c u m e r i s Lintn. 



bb 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, ai 160 



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 



basal is 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 1 i 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- 



