672 EXPERIMENT STATION RECORD. 



dipterous maggots, and mites. Snails may be captured under loose boards; roaches 

 may be driven away by pyrethrum and bisulphid of carbon; the attacks of maggots 

 may be partly prevented by screening windows and by liberal use of pyrethrum. 

 The greatest damage to mushrooms is due to Tyroglyphus Imtnen. A number of 

 remedies were tried without encouraging results. These remedies include bisulphid 

 of carbon, pulverized sulphur, vapors of sulphur, pyrethrum powder, hydrocyanic- 

 acid gas, tobacco dust, chlorid of lime, gasoline, and moisture. Further experiments 

 will be tried for the purpose of determining an effective remedy. 



Notes on Colorado imects, A. N. Caudell (pp. 35-38). — Brief notes on Nysim iiiluiitiis, 

 beet army worm, bean ladybird, aj)ple flea-beetle, cabbage looper, cottonwood leaf- 

 beetle, Clmocampa fragilis, C. tigris, bollworm, and grasshoppers. 



Grasshopjjer notes for 1901, L. Bruner (pp. 39-49). — Detailed notes are given on 

 the itinerary of the author through Nebraska, Colorado, and Wyoming to deter- 

 mine the extent of grasshopper ravages. A large number of species of grasshoppers 

 were observed, among which Melanoplus differentials, M. hinttatus, M. atlanis, M. 

 packardii, and 31. femnr-ruhrurn were most important. Other species were found 

 on prairies and uncultivated gnninds feeding ujion wild plants. In some localities 

 the grasshoppers appear to breed chiefly in alfalfa fields and along roadsides. The 

 author l^elieves that the destruction of birds is in some localities resjionsible for the 

 great increase in the number of grasshoppers. The other causes for this abnormal 

 increase are the abandonment of cultivated fields, allowing w'eeds to grow too exten- 

 sively, failure to burn prairies, and growing alfalfa without disking the ground in 

 the spring. 



Killing destructi.ve locusts uitk fungus diseases, L. Bruner (pj). 50-61). — A detailed 

 account is given of the various fungus diseases which have been used in destroying 

 locusts. The author exjierimented with the most of these parasitic fmigi and con- 

 cludes from his exiieriments that the best results are obtained from the use of native 

 fungi, and that the value of introduced fungi in destroying locusts has been greatly 

 overestimated. It is believed that the cultures distributed from Australia under the 

 name Mucor racemosus are jiroperly labeled, but that they do not contain the fungus 

 which caused the death of the grasshoppers from which the cultures were made. 



The conflict of the Russian Zyemstms inith the enemies of agriculture, V. Morachevski 

 (pp. 61-66). — An abstract of a paper previously noted (E. S. R., 11, j). 658). 



The tobacco-stalk tueevil, F. H. Chittenden, (pp. 66-70) . — Notes are given on the habits 

 and life history of this insect, based partly on the correspondence from L. If. Shelfer 

 in Texas. The species is TrirJioharis niucorea and is closely related to T. in^olita, 

 which occurs in Florida. In controlling this insect Paris green is found effective. 

 It was also suggested that the tol)acco stems should be destroyed as soon as the leaves 

 are cut. 



The leaf-mining locad txctle, ir,ith notes on. related species, F. 11. ('hittenden. (pp. 

 70-89). — Odontota dorsalis is said to have been unusually destructive in the District 

 of Columbia, Maryland, and Virginia during the past season. The injury was most 

 severe to young trees. The lieetle is described in its different stages and notes are 

 given on the geographical distriV)ution, food plants, life history, habits, and natural 

 enemies of the species. The Iteetles may be destroyed liy application of an arsenical 

 spray. Notes are also given on 0. rubra, 0. nervosa, 0. bicolor, 0. horni, O. notata, 

 0. californica, 0. scapularis, Microrhopala vittata, M. xerene, M. melsheimeri, M. floridana, 

 Octotoma plicatula, 0. marginicollis, and Stenopodins flaviduii. 



The l)ulletin also contains general notes on the introduction of Liparis -mouacha in 

 America, the loss caused by the variegated cutworm in 1900, Mediterranean flour 

 moth in Minnesota and other States, angoumois grain moth in 1901, recent injury by 

 the cigarette beetle, the occurrence of Dermeste.'t cddaverinn.'^ in tlie United States, 

 l)lister l)eetles injurious to fruit trees, vine chafers, Colorado potato beetle in the 

 South, rice weevil, cane borer, and various other notes from correspondents. 



