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 
UNE Wigs Nets) SEG are ea a eee ps roe Bn 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.................. | 
fulva Felt, C. 5308 
ccc Abdomen reddish brown; scutellum light yellow.................. 
recurva ta Felt Wess 
cccc 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 
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- 
ASD DEOWME "4 one, Jaw ns eee meridionalis Felt, C. 1005 
ce Second tarsal segment of posterior legs almost as long as tibia; 
abdomen grayish, thickly haired; scutellum yellowish; legs light 
DRO Wile. Same a ® aoe 4.2 cede ees cucumeris Lintn. 
bb Posterior tibia three-fourths the length of femora 
¢ 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... .. flavida Felt, C. 666 
dd Abdomen fuscous yellow; scutellum light fuscous yellow; legs 
light brown s.....2006 Mi.conc.. 2: 5) Domes sh elaine 
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 
OLANS Ck i re ay aes ae 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....... 
basalis Felt, a1722 
Aphidoletes hamamelidis Felt 
1907 Felt, E.P. N.Y. State Mus. Bul. 110, p. 125; separate, p. 29 (Bremia) 
1908 —_—_——_._ NV Y. State Mus. Bul. 124, p. 397 
The male was taken June 27, 1906 on witchhazel, Hamamelis 
virginiana, 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- 
