REPORT OF THE STATE ENTOMOLOGIST I915 165 



6 or 7 mm in diameter and presents a characteristic reticulated 

 appearance. The insect winters in the gall, the larvae escape 

 and form silk-lined cells among leaves or in the soil prior to trans- 

 formation. The late Doctor Thompson records having taken this 

 gall on Quercus ilicifolia, Q. rubra, Q. coccinea, 

 Q. stellata and Q. p a 1 u s t r i s. It also occurs on Q. 

 falcata, Q. velutina and Q. nigra. Professor Beuten- 

 mueller states that it is found on various species belonging to the 

 red oak group. Galls of this species were received from Riverdale, 

 Md. through Dr W. L. McAtee accompanied by the statement that 

 flocks of sparrows were observed opening the galls and eating the 

 larvae. 



There is in the Museum of Comparative Zoology at Cambridge, 

 Mass., a gall labeled Cecidomyia palustris O. S. The 

 deformity described by him (Ent. Soc. Phil. Proa, 1 1252 and 4:359) 

 is most probably the work of a Cincticornia and may be only a 

 modified form of C. p i 1 u 1 a e Walsh. 



The adult of what may have been this species was briefly char- 

 acterized by Dr A. S. Packard in the 5th Report of the U. S. Ento- 

 mological Commission. The characters given are insufficient for 

 the recognition of the species and it is possible that Doctor Packard 

 was misled and characterized an inquiline or some form issuing 

 from other material. We were fortunate in rearing a large 

 series of adults in the spring of 1909. Midges of this species were 

 obtained in numbers by the late Dr M. T. Thompson of Worcester, 

 Mass., from material collected in that vicinity. It was taken by 

 Prof. C. W. Johnson May 19, 1901 at Clementon, N. J., April 26, 

 1896 in Delaware county, Pa., and was reared from galls on 

 Quercus nigra and Q. rubra taken at Washington, 

 D. C, in March and April 1896 by the bureau of entomology. These 

 specimens, while presenting some minor variations among them- 

 selves, are probably all referable to one species. This midge appears 

 to be widely distributed, having been recorded, in addition to the 

 localities given above, from Mississippi, Indiana, Illinois and Rhode 

 Island. 



Gall. Reddish brown, coarsely reticulate, thick walled, irregularly 

 subglobose, 3 to 4 mm in diameter, somewhat depressed or fused 

 to form lobulate masses 1 cm or more in length. The galls may occur 

 scatteringly on the leaves or be present in large numbers, there 

 being from 1 to 4 or 5 up to possibly 75 on a leaf. On badly in- 

 fested leaves the galls may be confluent, and occasionally a con- 

 siderable number adhere to form an almost continuous mass on 



