172 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



the gall, was recorded on July 7, since then the larvae were often 

 found in the galls. This stage lasts from July to May of next year. 

 (Sometimes the larva delays pupating even in the late summer, but 

 this is very rare.) The pupa was first found in the first part of 

 June. After this I found several pupse for the remainder of the 

 month, few found in the last part of June, however, were much 

 advanced. A number of beetles have been reared from the galls 

 in the first part of June; this shows that the pupation of the beetle 

 must begin in the last part of May and first part of June. The 

 adult beetles appear in the first part of June, and continue to live 

 outside the galls till the first part of August. The eggs were found 

 on June 24, 30, July 5, etc., till the first part of August. 



OTHER OCCUPANTS 



Besides the flies, the gall makers, and the mordellid beetles, 



there are representatives of several orders of insects. Three are 



parasites, while all the rest are of uncertain position. Numbers of 



each found are given in the Table on page 9. 



•^-^Eiirvtonui qigautca Walsh, parasitic on Euros t a solidaghiis Fitch. 



Eiirytoma sp., parasitic on Euros ta soUdaginis Fitch. These 

 were determined by Mr. J. C. Crawford. They eat up the 

 host in the central cavity of the gall, pass their larval and pupal 

 periods within; they emerge, as adult, a little later than the fly. 



Aucistroct'ni tigris Sauss,.a larva found in the central cavity of a 

 gall on June 23, pupated on June 25 and became adult on July 

 5. This gall had no hole on its surface. This parasite was 

 determined by Mr. Rohwer. 



Easius umbratiis Nyl, an adult found in a deserted gall and deter- 

 mined by Mr. Rohwer. 



Halictiis provancheri, found in a deserted gall. Two adults 

 lived in the same central cavity. They were determineci by 

 Mr. J. C. Crawford, who states that these have nothing to do 

 with galls. 



Aiigochlora sp., found in a deserted gall and determined by Mr. 

 J. C. Crawford, who states that it has nothing to do with galls. 



