A:\IKRICAX IIYMENOrTEUA. bo 



the inside between the two galls ; in the cavity thus foniicil was the 

 likeicise douhh ovule. The coarctation in the niiiklle of the ovule was 

 generally much uiore niarkod, than that of the gall. The double ovule 

 contained two well-formed pupfc without any partition between them, 

 and hence almost in contact with each other. 



Such double galls showed difierent degrees of coalescence, and the 

 coalescence of their ovules was always in exact proportion to the coa- 

 lescence of the outer shells of the galls. Sometimes the galls, although 

 coalesceut externally, were still separated by a partition internally; 

 then each gall contained its own ovule. But whenever there was no 

 inner wall between the galls, the ovules were also coalesceut. In one 

 case I observed the inncM- wall only partially removed, the cavities 

 communicating by a rather small opening ; the ovules were in this case 

 coalesceut by a small portion of their surface, otherwise retaining 

 their rounded shape and thus almost representing the figure eight. 



In one of the galls I observed a small green caterpillar with yellow 

 stripes, which luid taken its abode in it and eaten up a part of the 

 ovule, and perhaps also sacked out the larva. 



II. CVMPS Q. NOTIIA, n. Sp. 



Still more remarkable, perhaps, than the preceding observation, is 

 the discovery, among large numbers of the gall of C. q. pahoitrix, of 

 another gall, constructed on the same principle, that is, with a movea- 

 ble ovule on the inside, but entirely different in tlu' details of its or- 

 ganization. 



This gall, growing on the same trees and in exactly the same situa- 

 tion with that of C q. j^rthistris, often alongside with it, is, however, 

 much more rare. Its shell is not globular but oblong, much thinner 

 and hence less succulent than that of C. q. palustn's. Its green sur- 

 face shows some longitudinal, semitransparent veins, of which there is 

 no trace in the other gall. The ovule likewise is different; instead of 

 round it is elongated, rounded at one end, pointed at the other, resem- 

 bling a seed very much; its outer shell is much harder, smooth and 

 shining. One of these galls had coalesced with a gall of C. q. p((/i(s- 

 tn's, just in the same manner as the above mentioned double galls of 

 the latter kind. And, singular enough, the ovule of this double gall 

 showed, by its unsymmetrical shape, that it was the compound of the 

 ovules of the two different kinds. (I have preserved the specimen in 

 my collection.) 



I obtained several specimens, male and female, from these galls, 

 which showed no perceptible difference from C. q. jmlustris. What 



