42 MISCELLANEOUS RESULTS OF WORK OF BUREAU IX. 



Rusticus (Lycwna) acmon Doubl. & Hew. This very pretty blue butterfly 

 was reared from Astragalus mollissimus from Hugo, Colo., the adult issuing 

 July 20, 1906. Nothing has been published in regard to the natural habits of 

 this species, and it is not known if it plays any important part in the reduction 

 of the loco weeds. 



Grasshoppers and related insects were collected in some numbers at Hugo, 

 Colo., on Aragallus lamoerti. They were mostly in the nymph condition and 

 therefore could not be readily identified. There were two species of grasshop- 

 pers (Melanoplus spp.), each occurring in about equal numbers, and a smaller 

 grasshopper (Opeia ooscura Scudd.), a walking stick (Parabacillus eoloradus 

 Scudd.) and a tree-cricket (CEcanthus sp.). Probably none of these accom- 

 plishes much in the line of defoliation of the loco with the exception of the two 

 Melanopli, which are allied to the pernicious Rocky mountain locust. 



Aphiochwta pygmwa Zett. — This small fly, which belongs to the Phoridae, was 

 reared from Astragalus mollissimus, from Hugo, Colo., July, 1906, from roots in 

 which other species were breeding. This is a European species known from 

 Texas westward to California. 



In the compilation of the above list the writer is indebted to Mr. 

 D. W. Coquillett for assistance in identifying some of the Diptera 

 mentioned, to Mr. Otto Heidemann for the identifications of the 

 plant-bugs, leafhoppers, etc., and to Mr. A. N. Caudell for naming 

 the grasshoppers and related insects. 



