Oct., 1915 Bulletin of the Brooklyn Entomological Society 75 



which produces greatly enlarged buds and the consequent destruc- 

 tion of the terminal growth. Two midges have been reared from 

 these deformities, namely, Contarinia coloradcnsis Felt and 

 Dicrodiplosis gillettei Felt, the former probably being the true 

 producer of the gall. Parasitic infestation is so common that 

 although we have attempted to rear a series of adults from 

 several excellent collections of galls, we are still uncertain as to 

 the identity of the true producer. 



Pine needles are frequently aborted and, in some cases at least, 

 a subglobose swelling is formed at the base of the needle cluster. 

 Two species are credited with this work in the eastern states, 

 namely, Cecidomyia hrachypteroides O. S. and Cecidomyia pini- 

 rigidcc Pack., though as yet the identity of the true producer has 

 not been ascertained. These two names stand on an uncertain 

 basis, at least so far as the habits of the species are concerned. 

 Two species have been reared from such deformities in this 

 country, the best known being the western Cecidomyia, now 

 Thecodiplosis piniradiatcc Snow and Mills. This gall midge pro- 

 duces a shortening of the needles and basal swelling on the 

 Monterey pine, Pimis radiata, though it has also been recorded 

 from several other pines and is occasionally so abundant as. tO\ 

 seriously stunt infested trees. Another midge, Janetiella colora-- 

 doisis Felt, was reared by Prof. E. Bethel from oval basal swell-- 

 ings of the needles of Pinits edulis. There are no data at hand as. 

 to the economic standing of this species. The important point ini 

 this connection is that the eastern species producing globose basal} 

 swellings of the needles have not been reared, though under cer- 

 tain conditions one at least is known to be abundant and some- 

 what injurious. 



The dead and dyihg wood of pine affords sustenance to several, 

 gall midges, none of which can be considered as of much economic 

 importance. Monardia lignivora Felt was reared from fungus- 

 affected heartwood of Finns rigida collected in North Carolina, 

 while M. pinicorticis Felt was obtained from Scolytid galleries in 

 pine. The same is also true of Cecidomyia hopkinsi Felt. Wifi- 

 nertsia pinicorticis Felt has been reared from the bark, presum- 

 ably dying, of Pinus inops. 



