REPORT OF THE STATE ENTOMOLOGIST I915 1 67 



Female. Length 3.5 mm. Antennae extending to the fourth 

 abdominal segment, sparsely haired, dark brown, the basal segments 

 fuscous yellowish; 14 segments, the fifth with a length two and one- 

 half times its diameter, with four circumfili; terminal segment with 

 a length one-half greater than its diameter, irregularly rounded. 

 Palpi; the first segment stout, with a length about twice its diameter, 

 the second one-half longer, more slender, the third a little longer 

 and more slender than the second and the fourth about one-half 

 longer than the third, strongly flattened and dilated. Mesonotum 

 dark brown, the submedian lines indistinct. Scutellum a reddish 

 yellow, postscutellum yellowish anteriorly, fuscous posteriorly. 

 Abdomen with the dorsal and ventral sclerites dark red, the in- 

 cisures and pleurae dull red, the ovipositor pale yellowish. Wings 

 hyaline, -costa light brown; halteres pale yellowish basally, whitish 

 apically, fuscous subapically. Legs fuscous yellowish; claws long, 

 slender, strongly curved, simple, the pulvilli shorter than the claws. 

 Ovipositor short. Cecid. 1105. 



Cincticornia symmetrica O. S. 



1862 Osten Sacken R. Mon. Dipt. N. A., 1:200-1 (Cecidomyia) 

 1869 Walsh, B. D. & Riley, C. V. Am. Ent., 2:29 (Cecidomyia) 



1891 Riley, C. V. & Howard, L. O. Ins. Life, 4:126 (Polygnotus 

 tumidus Ashm. reared, Cecidomyia) 



1892 Beutenmueller, William. Am. Mus. Nat. Hist. Bui. 4:270 (Cecidomyia) 

 1906 Felt, E. P. Ins. Affec. Pk. & Wdld. Trees, N. Y. State Mus. Mem. 



8, 2:710 (Cecidomyia) 



1 910 Stebbins, F. A. Springf. Mus. Nat. Hist. Bui. 2, p. 18 (Cecidomyia) 



This deformity has been described by Osten Sacken as a hard, 

 red gall on the leaves of different kinds of oak. It is small and round, 

 between one-twentieth and one-tenth of an inch in diameter, though 

 more commonly assuming an irregular shape by the coalescence of 

 several galls. He states that this gall occurs in large numbers on 

 the leaves of Quercus falcatain autumn, sometimes occupy- 

 ing almost the entire leaf and having exactly the same size and 

 shape on both surfaces. A study of the types of this gall in the 

 Museum of Comparative Zoology at Cambridge, showed that it 

 was very close to, if not identical with, that of Cincticornia 

 p i 1 u 1 a e . Beutenmueller states that it differs from the more 

 common C. pilulae by protruding equally on both surfaces of 

 the leaf, and adds that it has not been found in the vicinity of New 

 York City. The larvae in the collections of the United States National 

 Museum and labeled as having come from this gall, belong to the 

 genus Cincticornia and possibly may be different from those of 

 C. pilulae. It is provisionally placed next this common species. 



