266 ENTOMOLOGICAL SOCIETY 



midsummer transformation, and, in cases of the fall brood, for 

 hibernation. A Euura and a Pristiphora complete the list. 

 The record of these species and synonymy is as follows : 



TRUE GALL-MAKERS. 



Pontania hospes Walsh. This species is synonymous with P. 

 pomum, from which Walsh himself says it is absolutely indistin 

 guishable, except in certain very slight and unimportant colora- 

 tional features. It was reared from the gall of Cecidomyia 

 strobiloides O. S. (see Proc. Entom. Soc. Phila., VI, p. 261). 

 I have also received two specimens of pomum from Cornell 

 University, labelled as having been reared from this same Ceci- 

 domyiid gall. 



Pontania inquilina W^alsh. This species is synonymous 

 with P. desmodioides Walsh, who says of it that it is very like 

 a pale variety of the gall-making species desmodioides. It was 

 reared from the gall of Cecidomyia rhodoides (1. c., p. 261). 



Nematus quercicola W^alsh MS. This species Walsh appar 

 ently never described, although he refers to it on two occasions 

 (1. c., p. 260 ; Amer. Entomologist, II, p. 73) . It is undoubtedly, 

 from Walsh's own statement, synonymous with pisum. He 

 reared it from an undescribed cabbage-like gall of Cecidomyia 

 on white oak. He says that it cannot be distinguished from 

 JVematus s. pisum, and differs only in the fact that all of his 

 species of pisum entered the ground to pupate and the oak species 

 pupated within the gall. My own records of pisum, however, 

 show that it hibernates in pith or other dry, soft woody material as 

 described, and will not enter the soil except as a last resort. 

 Walsh's specimens, after abandoning their willow galls, un 

 doubtedly entered and transformed within this oak gall because of 

 the lack of any more suitable material. 



Euura perturbans W^alsh. This species is synonymous with 

 Euura ovum,, Walsh himself saying that it is "absolutely 

 indistinguishable " by any reliable characters. A number of 

 males and females were reared from the galls of Cecidomyia 

 strobiloides O. S., and from C. batatas Walsh and C. rhodoides 

 Walsh, all galls of the preceding year, and "two females bred 

 many years ago, in the same season that the gall was produced, 

 so far as I recollect, from an undescribed Cecidomyid bud-gall 

 Vitis fusus Walsh MS. composed of bunches of 6 to 50 

 fusiform galls, occurring on the stem of wild grape vine 

 ( Vitis cordifolia), each gall attached by a single point and 

 about one-half an inch long" (1. c., p. 252 ; pp. 254, 255). 



From the experience with the larvae of Euura ovum, already 

 detailed, the significance of the above records is at once appa- 



