Q4 NEW YORK STATE MUSEUM 
cARYOMYIA Felt 
1909 Felt, E.P. Econ. Ent. Jour., 2:292 
1911 —————— N.Y. Ent. Soc. Jour., 19:56 
1913 Kieffer, J. J. Gen. Insect., fasc. 152, p. 144 
The males may have the flagellate antennal segments binodose 
or cylindric and subsessile. There are invariably three low, stout 
circumfila. The antennal segments of the female are cylindric, and 
with two circumfila. The palpi are tri- or quadriarticulate. The 
wings are relatively broad (pl. 15, fig. 4), the third vein uniting with 
the margin at or near the apex. The claws are simple and the pul- 
villi well developed. Type Cecidomyia tubicola O.S. 
This genus has somewhat the appearance of a small Hormemyia 
rt Trishormomyia except that the mesonotum is not greatly pro- 
duced over the head and there are but fourteen antennal segments in 
both sexes. The male genitalia are much as in Hormomyia while 
the ovipositor of the female is short, triangular and with minute 
lobes apically. 
Caryomyia may be an aberrant Asphondylid somewhat allied to 
Cincticornia, since the circumfila in the two genera are not markedly 
different and they occur upon the somewhat related Carya and 
Quercus. The constrictions in the antennal segments (fig. ga) 
in some species of Caryomyia are such that too much importance 
should not be attached to them, specially as there are species where 
the constrictions are slight or wanting. It is possibly a connecting 
form and one might consider that in Caryomyia we had the process 
of constriction and extension of the antennal segments, so character- 
istic of the Itonididinariae as a whole, in an incipient stage. 
The larvae are usually stout, whitish and in the majority of the 
species the breastbone is slender and unidentate (fig. 14), a few 
have it narrowly bidentate (fig. 12), while in C. caryae O.S. 
this organ (fig. 8) is dilated apically and has the two teeth widely 
separated. 
The genus Caryomyia produces most of the peculiar and variable 
leaf galls on hickory (see plate 10). Several of these, as observed 
by the late Doctor Thompson, begin as a brownish blistered area 
with a slight central point and as the galls develop the overlying 
epidermis is torn apart. A fuller description of this is given in the 
account of C. inanis Felt. The winter is passed by the larvae 
within the galls, the flies issuing about the time the young leaves 
appear. ‘Two females were found at Nassau May 11, 1911, hope- 
lessly stuck in the exudations from hickory buds. It not infre- 
quently happens that several species of Caryomyia galls occur upon 
the same leaf. 
