THE CANADIAN ENTOMOLOGIST. 197 



light green in colour, and about 8 mm. long. It probably punctures the 

 alfalfa. 



Platy7netopius acutus, Say. 



Swept from alfalfa May 1 2. It is small, brownish or grayish in colour, 

 with pointed head. 

 Oeclens decens, Stal. 



Found, May 15 to June 2, on leaves of both Yucca a?igusttfolia and 

 Y. macrocarpa (?), in which its egg-punctures were very numerous, 



Thysanoptera. 



The following species were determined by Professor H. Osborn : — 



Thrips triticii Fitch. 



Swept in great numbers from alfalfa May 12 to 28. It undoubtedly 

 does much harm to the plant. The same species was also beaten in 

 countless numbers from mesquite ( P. jiilifiora). May 16. 



Thrips, sp. (?) 



On May 5, 1891, some curious cluster-like galls were noticed on our 

 cottonwoods ( Populus fremontii). At first they were noticed only on 

 staminate trees, and consisted of clusters of staminate flowers reverting 

 towards a leaf-development. More staminate galls were found on May 

 7, and also two or three pistillate clusters. On all of these gall-clusters 

 there were present large numbers of an immature thripid, which Professor 

 Osborn says appear to be different from Thrips tritici, and possibly 

 belong to a different genus. Whether this thripid has anything to do 

 with these abnormities must be proved by future investigation. It did 

 not seem to be found on the foliage, but was perhaps found on all the 

 flowers. 



Coleothrips trifasciata, Fitch. 



Swept from alfalfa May 28. Doubtless causes more or less injury, 

 though it was by no means so numerous as Thrips tritici. 



Orthoptera. 

 Homeogamia, n. sp. ? 



This is a whitish roach which is sometimes attracted to light in the 

 evening, if I remember rightly. It is quite different in appearance from 

 its eastern allies. Determined by Prof. Bruner, 

 Ceuthophiius pallidus, Thos. (?) 



This is a white cricket which was found, June 10 to 27, in houses 

 eating holes in lace curtains and other fabrics. It is reported to cause 



