1916] Williams — New Species of Tkripoctenus 61 



the Terebrantia could not be determined for lack of material, but 

 the great difference in habit renders it unlikely that it would do 

 so under natural conditions. 



Acknoivledgments. 



My thanks are due Professor Brues for aid in classifying the 

 parasites and for suggestions and references of all kinds during the 

 course of the experiment. To Dr. Hood I am indebted not only 

 for the determination of the hosts as mentioned above, but also 

 for information about their life-history and for references on the 

 parasite. Much use has been made of Mr. Russell's bulletin for 

 purposes of comparison. 



References. 



Howard, L. O. Report of the Entomologist for 1911, U. S. 



Dept. of Agriculture. 

 Crawford, J. C. Proceedings of the Entomological Society of 



Washington, Vol. XIII, p. 233. Ibid., pp. 235-238. 

 Russell, H. M. Bull. Bur. Entom. U. S. Dept. Agric, Technical 



Series, No. 23. 

 Hood, J. D. Canadian Entomologist, Sept., 1908. 



