ART. 19. GALLFLIES OF THE FAMILY CYKIPIDAE WELD. 23 



is 5 by 7 mm., flattened, tapering at each end. The larval cell is in 

 the middle and placed transversely. 



Habitat. — The type material was collected at Texarkana, Arkan- 

 sas, October 15, 1917. A pupa was cut out March 25, 1919 (trans- 

 formed by April 29), and two living flies were cut out December 2, 

 1919. Normal emergence date unknown. The same galls were noted 

 at Ironton, Missouri; Little Rock and Hot Springs, Arkansas; and 

 at Palestine, Texas. Large numbers were seen at Eosslyn, Virginia, 

 and in the District of Columbia on October 10, 1920, when the galls 

 were dropping to the ground and being gnawed open, probably by 

 mice. 



CALLIRHYTIS GLANDULUS (Beutenmueller) . 



Andrieiis glandulas Beutenmueller, Bull. Brooklyn Ent. Soc, vol. 8, 1913, 

 p. 103, fig. 10. 



This species was described from "flies collected on the pine-barrens 

 of New Jersey early in May on twigs of Quercus prinoides Willde- 

 now presumably ovipositing in the young acorns." They agreed 

 with a fly reared from an " acorn pip gall " by Riley years before. 

 Hence the gall associated with this species at the time of description 

 was the common acorn gall of the white oaks — an elongated cell 

 in a recess in the side of the acorn cup, this recess being fringed in 

 Q. hicolor and smooth in Q. macrocarpa and several of the chestnut 

 oaks. Since the fimbriate gall on hicolor has recently been reared by 

 the writer and found to produce a very different fly, described in the 

 present paper as Andricus fimhriatus Weld, it follows that the gall 

 of glanduUis is at present unknown. It may be that the similar gall 

 on the chestnut oaks, protruding more than half its length from a 

 recess which is not fringed, is the gall of this species, but no one has 

 yet reared it. 



Two cotypes of this species studied by the writer belong in the 

 genus Callirhytis and the species is here transferred to that genus. 

 The two specimens measure 3.4 and 3.5 mm. They are closely related 

 to the agamic females of Callirhytis operator (Osten Sacken). 



CALURHYTIS OPERATOR (Osten Sacken), agamic. 



Plate 4, fig. 15. 



The original material of these acorn pip galls was collected on 

 August 23, 1871, at Waterbury, Connecticut, on Q. ilidfolia during 

 Riley's visit to Bassett. Bassett kept his galls over a year, and rear- 

 ing nothing threw them away. Riley kept his longer, and the second 

 spring succeeded in rearing the maker, " the flies emerging in early 

 spring just as the oak buds were bursting." The United States Na- 

 20107— 22— Proc. N. M. vol. Gl 27 



