94 NEW YORK STATE MUSEUM ' 



CARYOMYIA Felt 

 1909 Felt, E. P. Econ. Ent. Jour., 2:292 



191 1 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 cylindricand subsessile. There are invariably three low, stout 

 circimifila. The antennal segments of the female are cylindric, and 

 with two circumfila. The palpi are tri- or quadriarticulate. The 

 wings are relatively broad (pi. 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 Hormomyia 

 or Trishormomyia except that the mesonottmi 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 

 tile ovipositor of the female is short, triangular and with minute 

 lobes apically. 



Caryomyia may be an aberrant Asphondylid somewhat allied to 

 Cincticornia, since the circum.fila in the two genera are not markedly 

 different and they occur upon the somewhat related Gary a and 

 Quercus. The constrictions in the antennal segments (fig. 9a) 

 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 ofC. inanis Felt. The winter is passed by the larvae 

 vv^ithin the galls, the flies issuing about the time the young leaves 

 appear. Two females were found at Nassau May 11, 191 1, 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. 



