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P. carym-globuli , Walsh. ... 
Forming hemispherical galls, about the fourth of an inch in diam¬ 
eter on the upper surface of the leaves of Carya glabra and alba; the 
galls rather Hat below, where they open with a slit. 
P. spinosa , Shimer. 
Forming large, irregular galls, covered with spines, on the petioles 
of the leaves of carya amara (bitternut hickory), the galls opening 
beneath with an irregular sinuate slit. 
P. caryae-septa Shimer. 
Forming flattened galls with a septum, on the leaves of carya alba , 
which open both above and below. 
P. forcata , Shimer. 
Forming galls similar to those formed by P. caryae semen , but 
larger. 
“ . 
P. depressa , Shimer. 
Forming depressed galls on the leaves of carya alba , which open 
below with a restricted mouth fringed with filaments. 
P. cornica , Shimer. 
Forming galls similar to the last, but without fringe. 
P. caryce-gummosa , Riley. 
Forming pedunculated, ovoid or globular galls on the under side of 
the leaves of the carya alba ; the gall white pubecent and gummy or 
sticky, opening below in a fibrous point. 
P. caryw-ren , Riley. 
Forming numerous more or less confluent, mostly reniform galls on 
the petiole of carry a alba ; green, densely pubescent and opening with 
a slit the whole of their length and transversely to the axis of the 
petiole. 
P. carya}- 1 fall ax, Walsh. 
Forming conical galls thickly crowded on the uppei suiface of the 
leaves o ( carya alba. Strongly resembling P carycefolice, but the 
height one-third greater than the basal diameter, and opening below 
instead of above, in a circular, fuzzy mouth. 
P. castaneae . Maid. 
This is the Chernies castaneae of Hal deman n, which Riley says is 
undoubtedly a Phylloxera; although I have not seen the description, 1 
presume, from the name, that it infests the chestnut. 
Sub-family. 
RHIZOBINiE. 
This sub-family as here arranged is necessarily artificial as it is 
based chiefly on the supposed permanently wingless condition of the 
species, and their habit of residing in the ground and feeding on the 
