pected to be identical. Not knowing whether Limothrips poaphagtis 

 Comst. and Tlirips striata Osb. were positively synonymous, I sent 

 some of my specimens to the Division of Eintomology at Washing- 

 ton for determination, where they were referred to Mr. Theo. I'er- 

 gande, one of the highest authorities on this group of insects, who 

 expressed the opinion that the specimens were identical with Thnps 

 striata Osb., and placed them in the genus Ano2)liothrips Uzel. 



"For the purpose of making a comparative study of the material 

 before me with the types of Professors Comstock and Osborn, Pro- 

 fessor Fernald obtained the loan of these types, and I find upon 

 making the comparison that Liviothrij^s p)oaphagris Comst., Thrips 

 striata Osb., and the species which I have found in such abundance 

 here in Amherst and upon which I have made the studies given in 

 this paper, are identical ; and, as the species was first described by 

 Osborn, his name should hold, and this insect be known by the scien- 

 tific name of Ana2)hothrips striata (Osb.). 



" Since Professor Comstock's first mention of the injury done by 

 this species of thrips to June grass and timothy, several economic 

 entomologists have referred to the most conspicuous effects of its 

 work, the dead tops of these grasses, as ' silver-top ' or ' white-top.' 

 Many have questioned the agency of thrips in producing this injurj^, 

 and have ascribed it to some other suctorial insect ; but the majority 

 of writers were inclined to credit thrips with a part, if not all, of 

 this damage. As they had no means of identifying the little pest, 

 they have usually referred to it as the ' grass thrips.' This name 

 has been very generally used for this species, but not for any other 

 so far as I can learn, and I have therefore adopted it as the common 

 name." 



LIFE HISTORY. 



The adults (Figs. 3 and 4) pass the winter at the bases of the 

 grass stems just above the ground. In the spring as soon as the 

 weather is sufficiently warm to start the grass, they become active 

 and begin to deposit eggs, continuing to do this for from four to six 

 weeks. The eggs are deposited in the tissues of the fresh and ten- 

 der parts of the leaf, and one female may lay quite a number, indi- 

 viduals kept in confinement averaging from fifty to sixty, each. The 

 process of egg-laying is as follows : The female arches her body so 

 as to bring its weight to bear upon the slender ovipositor which is 



