ISCI] (59 



A specimen of.i similar gall, but less smooth aud less regularly globu- 

 lar was observed by me on the swamp chestnut oak. 



20. QuERCUS FALCATA. Spanish Oak. OlAony, mhreniform, smooth 

 (jalh^ somewhat jwin fed at ti'j), ijelloicish-hr own, fastened hy one end to the 

 twij. Length three-quai'ters to an inch and more. 



An abortive bud is generally at the basis of the gall. A spongy mass 

 fills the inside. In a kernel in the centre I found the pupa of a large gall- 

 fly apparently allied to (Jt/nips conjiuens Harris. Several other, smaller 

 hollows which I found nearer to the shell were evidently those of parasites. 



I obtained some of the latter, but never succeeded in bringing the gall- 

 fly to perfection, although I noticed the gall several times, always on the 

 Spanish oak. 



21. QuERCUS ALBA. White oak. Round mass, resemhlinc/ loool on oak 

 tirijs, infirnalli/ iciflt )n(}neroiis, sred-likc </rains. CynipS SEMINATOR 

 Harris. 



This gall and the insect have been sufliciently described by Dr. Harris 

 and Dr. Fitch (Eeports, Vol. II, No. 315). I will only notice the difi"er- 

 ences, between my observations and those of Dr. Fitch. The thorax of 

 my female specimens was black, the head alone being reddish-brown, where- 

 as Dr. Fitch obtained numerous females with head and thorax cinnamon- 

 red. Again, this author states that the females are much more numerous 

 than the males, as he had obtained from a single gall 40 9 and one male. 



My observation gave a difterent result, as I obtained from one gall 44 9 

 and 29 % specimens and it is possible that many more had escaped before, 

 as the flies began to come out immediately after I got possession of the 

 gall. The antennas of my % specimens are yellow at their base, but decid- 

 edly brownish on their latter half. Finally the four galls of this kind, 

 which I found in the environs of Washington have many angular projec- 

 tions which render their surfice uneven and not so smooth and rounded 

 as figured by Dr. Fitch. Notwithstanding all these difierences, I hardly 

 doubt that my specimens are identical with Cipiips seminator Harris. 



22. Quercus ALBA. White Oak. '■'■ Dense clusters of hoUow, hladder- 

 I ike r/alls, pair dull t/r'Uow, resemhling in shape prrserred fi;/s, jjacked in 

 ho.res." (Dr. Fitch, Ileports, Vol. II, No. 314.) Cynips quercus etcus 

 Fitch. 



I have found a similar gall near Washington, but it is much smaller, 

 the whole cluster being about three-quarters of an inch long and about a 

 quarter of an inch broad. As this gall was on the same twig with one of 

 the galls of C quercus tuber, I am not sure from which of them the flies 

 1 obtained came, the more so, as, according to Dr. Fitch's statement both 



