PSYCHE. 



NOTES ON CERTAIN CVNIPIDAE WITH DESCRIPTIONS OF NEW 



SPECIES. 



BY C. P. GILLETTE, AMES, IOWA. 



[Reprint, with additions, of "A studv of the cynipidae" (Rept. Midi, board agric. , 1888, 



p. 446- . Separate, 15 p.)] 



I wish to acknowledge my especial 

 obligations to Mr. H. F. Bassett and to 

 Mr. W. H. Ashmead for the determining 

 of many species and for the large number 

 of typical and other specimens that thev 

 kindly sent me and which have been a 

 great help in preparing this paper. I 

 am also under many obligations to Dr. 

 C. V. Riley and Mr. L. O. Howard for 

 the determination of galls and parasites ; 

 and to Professor A. J. Cook for the op- 

 portunities and material put at mv dis- 

 posal in the early part of m}- study. 



OBSERVATIONS ON DESCRIBED SPECIES. 



DiastropJiKS i-adicuin Bass. My 

 galls belonging to this species ■w^ere re- 

 ceived from a fruit-grower near Lansing, 

 Michigan, in May, 1S87, and a fine lot 

 of cynips %vere reared from them. The 

 galls were taken from small roots of the 

 raspberry and appeared as irregular 

 knotty swellings from one-half to three- 

 fourths of an inch in diameter. These 

 galls, which grew beneath the surface 



of the ground, seem to have been better 

 protected from the attacks of parasites 

 and guest-flies, as only true cynips were 

 reared. 



I have never heard of the galls occur- 

 ring in sufhcient numbers to do serious 

 damage. In the College garden several 

 hundred raspberry l:)ushes were trans- 

 planted and their roots examined for the 

 galls but none were found. 



Amphlbolips coccinea O. S. vSo far 

 as I can find, this species has always 

 been repoited as producing galls on 

 ^7ierc?is coccinea. The onl}' tree on 

 which I have taken the galls is a small 

 scrub oak, which, I was informed by a 

 botanist, was probably ^. nig?-tim., but, 

 as there was no fruit on the tree, the 

 species could not be ascertained Avith 

 certainty. On this tree there were not 

 less than thirt}' or fort}' galls, the larg- 

 est of which measured one and three- 

 fourths inches in their greatest diameter 

 by one and one-half inches in their least 

 diameter. These grails differ from the 



