114 NEW YORK STATE MUSEUM 
the third, dilated. Mesonotum dull black. Scutellum and post- 
scutellum deep orange. Abdomen deep red, the terminal segment 
fuscous yellowish; ovipositor yellowish. Wings hyaline, long, slender, 
costa reddish. Halteres fuscous yellowish. Legs yellowish and 
variably tinged with deep red; claws stout, strongly curved, the 
pulvilli nearly as long as the claws. Ovipositor short, the terminal 
lobes slightly protuberant, short, tapering, narrowly rounded. 
Cecid. a1g41a. 
Caryomyia caryaecola n. sp. 
1862 Osten Sacken, C.R. Mon. Dipt. N. A., 1:192 (Cecidomyia) 
1892 Beutenmueller, William. Am. Mus. Nat. Hist. Bul, 4:266 
(Cecidomyia) 
1904 ——-———_ Am. Mus. Nat. Hist. Guide Leaflet 16, p. 27 (Cecidomyia) 
1906 Felt, E. P. Insects Affecting Park & Woodland Trees, N. Y. State 
Mus. Mem. 8, 2:619, 628, pl. 1, fig. 28 (Cecidomyia) 
1907 Cook, M.T. Acad. Sci. Proc., separate, p. 7 (Cecidomyia) 
1908 Jarvis, T. D. Ent. Soc. Ont., 38th Rep’t, p. 87 (Cecidomyia) 
1909 Jarvis, T. D. Ent. Soc. Ont., 39th Rep’t, p. 84 (Cecidomyia) 
1910 Stebbins, F. A. Springfield Mus. Nat. Hist. Bul. 2,p.13 
1915 Felt, E.P. N.Y. State Mus. Bul. 175, pl. 4, fig. 9 
1918 ——————__N. Y. State Mus. Bul. 200, p. 43 
Galls, made by the above-named species, were taken on bitternut 
hickory at Hamburg, N. Y., October 17,1907. They were limited, so 
far as we observed, entirely to the bitternut hickory (Carya cordi- 
formis). Apparently the same species has been recorded by Jarvis 
as being locally common in Ontario on sweet hickory (Carya 
alba). Specimens gathered in the fall would presumably produce 
adults the following June, there being apparently one generation 
annually. The earlier bibliographic references cited above pre- 
sumably refer to this species. The gall described below agrees very 
closely with specimens collected by Osten Sacken, deposited in the 
Museum of Comparative Zoology at Cambridge, Mass., and bearing 
the label Cecidomyia caryaecola. 
Gall. The galls (pl. ro, figs. 2, 3) were almost invariably clustered, 
usually thickly, along or close to the midrib; three to eight or ten 
in a group, and sometimes two or three clusters on the underside of 
one leaf. The gall is subglobular, about 3-4 mm in diameter and 
almost invariably with a long, slender apical process as long or a 
little longer than the basal enlargement. The color in late fall is 
a pale greenish, the elongate tip being a variable dark reddish brown. 
The gall matures in October and drops from the leaves readily. 
This gall is presumably distinct from the one appearing under the 
name of Caryomyia caryaecola O.S. in “‘ Key to American Insect 
Galls,”” N. Y. State Museum Bulletin 200, p. 43 and plate 6, figs. 2, 
2519 LS: 
