*>^8 [December 



leathered October 20th, the insect had eatea a passage but they still 

 remain in the galls.* Each contains a single, subapterous, female gall- 

 fly, closely related to G. q. forficoniis Walsh, and C. q. pczomarhoides 

 Osten Sacken. Dr. Fitch's figure and description of the gall of C. q. 

 pisum, {N. Y. Rep. Vol. 2. No. 319.) answers well for this gall, but his 

 were from a different species of oak, and this gall-fly is very distinct 

 from that he describes. Baron Osten Sacken informs me that these 

 subapterous females have winged males and belong to the genus Andri- 

 cus. 



I let this species stand with the related species named above and call it 



C. q, hirta n. sp. 



Head black, vertex slightly rugose, densely hairy as is also the entire dorsal 

 portion of the thorax: face pubescent, hairs converging towards the mouth: 

 palpi shining brown, tips black. AntenncE long, slender, black, 14-jointed. 

 Thorax black, very small, densely covered with a coarse, yellowish-white pu- 

 bescence. No striae visible on the mesothorax. They are concealed by the 

 pubescence if they exist. Feet a dull brownish black, but in a strong light 

 appear of a very dark reddish brown, posterior pair lightest and all somewhat 

 paler at the joints. The wings are mere yellowish white scales. Abdomen 

 large, black and shining, a short, close pubescence on each side of the 2nd seg- 

 ment and this and the remaining segments, except the first, bounded across 

 the back and sides on the posterior edge by a belt of long, silvery white hairs. 

 These belts are divided on the dorsal ridge by a shining glabrous line like the 

 anterior portion of the segment. These belts are plainly visible without the 

 aid of a magnifier. Length .14. 

 Six 9 specimens. 



New species of galls, the flies of which are. as yet. unknown to me 

 QUERCUS Chinquapin. Gali a cone-like buni^, developed from the 

 axillaris leaf-buds, and covered when green and often when dry with a 

 dense, rose-like cluster of imperfectly developed leaves. The cell con- 

 taining the larva smooth, shining, oval, about one-eighth of an inch long, 

 half immersed in the apex of the cone. — C. Q. frondosa n. sp. Gall 

 fly unknown. 



These singular and very pretty galls ai'e developed after the summer 

 growth of the tree is completed, and the axillary buds are formed. The 



* November 29. A single fly was found in the box yesterday. It is quite ac- 

 tive, and does not differ from those cut from the galls, showing those to have 

 been mature. 



