236 journal of economic entomology [vol. 12 



Distribution 



The distribution of the pine tube moth is not very well known. 

 Comstock^ reports that it occurs as far south as Florida; Kearfott,^ 

 from New Jersey and Ontario, and Packard^ from Massachusetts and 

 Maine. Probably it is safe to conclude that Eulia pinatuhana occurs 

 throughout the white pine district of southern Canada and eastern 

 United States. 



Host Plants 



During this study an examination of the various species of pine in 

 the vicinity of Ithaca, N. Y., was made to determine whether white 

 pine is the only host plant of the larvae of the pine tube moth. Our 

 observations lead us to conclude that white pine (Pinus strobus L.) 

 is the only host plant. Fernald'' has called attention to the fact that 

 the European Eulia politana has never been reported from a single 

 conifer in Europe. 



Natural Enemies 



In connection with this study twenty-five individual parasites have 

 been bred. A list of these parasites is given in the table, with the dates 

 of emergence. Through the kindness of Dr. L. 0. Howard, chief of the 

 Bureau of Entomology, five have been identified to genera and twenty 

 to species. The Chalcids were identified by Mr. A. A. Girault. The 

 remaining parasites were identified by Mr. R. A. Cushman and Mr. 

 S. A. Rohwer. Of the total number seven are larval and eighteen are 

 pupal parasites. 



Pupal Parasites 



The pupal parasites were bred in connection with the rearing of the 

 adults. In order to breed the moths successfully it is necessary that 

 the pupae remain undisturbed in the tubes. Mr. Cushman calls atten- 

 tion to the fact that Eclytus pleuralis has previously been bred from 

 spider nests and as the parasites in question were not bred from naked 

 pupae it is probable that they came from a similar source as the tubes 

 are frequently the haunts of small spiders. 



Larval Parasites 

 On October 18, 1915, while engaged in making head measurements 

 of caterpillars the writer observed a larva that appeared sluggish. 

 Thinking that this individual was ready to molt, it was placed in a 



1 1914. Comstock, J. H., and Anna B. A Manual of the Study of Insects, p. 245. 



2 1905. Kearfott, W. D. Canadian Entomologist, 37: 10. 



3 1890. Packard, a: S. 5th Report, U. S. Ent. Comm., p. 791. 



* 1881. Fernald, C. H. Report of U. S. Comm. Agr., 1880, p. 265. 



