Cincinnati Society of Natural History. 



worms. In spring, larvae have been found fully three feet 

 from the trunk and nearly a foot below the surface. The 

 larva appears to develop very rapidly, many having reached 

 their full growth by the middle of August. When full fed 

 they work their way to one side and form earthen cells, within 

 which they remain without food until the time of pupation 

 the following June, curled up in such a manner as to bring 

 the head in close proximity to the ventral surface of the pos- 

 terior segment. In April I have found an occasional larva 

 less than half grown, and though these were in cells when 

 found, it is probable that they return again to the roots and 

 finish their growth, transforming to adults even as late as the 

 middle of August, an occasional adult being observed abroad 

 as late as September. 



NATURAL ENEMIES. 



As is usual in cases of an over abundance of the individuals 

 of a species, these were quite abundant in the vicinity of 

 Cleveland, Ohio, where Fidia viticida developed in great num- 

 bers during the past Summer. While the adults are doubtless 

 destroyed by birds to some extent, no such cases were 

 noticed, nor were insectiverous birds present in unusual num- 

 bers. The same may be said of predaceous insects, no 

 enemies of the larvae having been observed in situations lead- 

 ing one to suspect them of destroying either the larvae or 

 pupae. With the eggs, however, the case was quite different. 

 The little brown ant, Lasius brunneus, var. alienus, was 

 observed several times in the act of feeding upon them, 

 though they could only reach such as were much exposed. A 

 small mite, possibly TyroglypJnis phylloxerae P. & R., though 

 Dr. Geo. Marx, of Washington, D. C, was not able to refer 

 the immature specimens sent him to the proper genus, was 

 frequently observed to approach a cluster of eggs and extract 

 the contents of several in succession, while still another 

 smaller mite, resembling HopIopJiora arctata Riley, was several 

 times found similarly engaged. The remaining two species 

 are described in the following pages, by Mr. Ashmead. 



The fact of Fidiobia flavis, Ashmead, being a parasite on 

 coleopterous ova having been privately called in question by 



