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NEW YORK STATE MUSEUM 



numerous as those of some other species. They occur commonly in 

 the vicinity of New York City, and about Albany, N. Y. They 

 have been recorded from Ontario by Jar vis. 



The galls begin to appear in June and by October contain a full- 

 grown larva. The latter remains in its retreat till the following 

 spring, then transforms to a pupa and normally produces an adult 

 probably early in June. The midge described by Osten Sacken under 

 the name of Diplosis caryae as the maker of this gall is 

 probably an inquiline. In any event it can hardly be a Caryomyia. 

 Adopting recognized principles of nomenclature, we have restricted 

 the name caryae to the characteristic larva found by Osten 

 Sacken within the gall and described by him prior to the description 

 of the adult. The type specimens of the gall in the Musetmi of 

 Comparative Zoology confirm our identification of this interesting 

 species. Platygaster caryae Ashm. and Ceroplaty- 

 merus caryae Ashm. (Insect Life, 4:125) may have been 

 reared from this gall. 



Gall. Gall (pi. 10, fig. 7) about 2 mm in diameter, irregularly 

 subglobular, usually with a slight nipple, sometimes distorted by 

 pressure of adjacent galls, yellowish green or brown, very sparsely 

 clothed with short, whitish hairs, thin- walled, monothalamous . 



Larva. Length 2 . 5 mm, stout, white and easily distinguished by 



^- 



Fig. 8 Caryomyia caryg,e, 

 breastbone of larva (en- 

 larged, original) 



the rather] conspicuous breastbone (fig. 8) with its two slender, 

 widely separated toothlike projections. Head small; antennae 



