1096 EXPERIMENT STATION RECORD. 



ENTOMOLOGY. 



Report of the entomologist {Colorado Sta. Bui. 94, pp. ' s> -s pis. •>'). — Some of the 

 more important insects of 1903 and an annotated list of Colorado Orthoptera are dis- 

 cussed by ('. P. < fillette. 



A grain bug {Pentatoma sayi) was reported as causing great injury to oats, wheat, 

 and other grain. The insect was also observed on alfalfa, sunflowers, garden veg- 

 etables, and other plants. The pest is single brooded and there appears to be con- 

 siderable advantage in having the grain ripen early. Fall wheat almost entirely 

 escapes injury. Grasshoppers were comparatiyely few in numbers during the season. 

 Further experiments were made with Australian grasshopper fungus, but no evidence 

 was obtained that this fungus has any effect upon the grasshoppers. The use of 

 Criddle mixture was of little avail, but better results were obtained with poisoned 

 bran. 



Economic, biological, and descriptive notes were also given on the army cutworm 

 and other species of cutworms, leaf rollers, beet webwonn, gooseberry fruit worm, 

 plant lice, false chinch bug, and western wheat-stem maggot which is described as a 

 new species under the name Pegomyia cerealis. A list of the Orthoptera which occur 

 in Colorado is also given with brief notes on their distribution and habits. The total 

 number of species of Orthoptera discussed is 145. These insects are distributed 

 throughout the State from the lowest to the highest altitudes. 



L. Brunei- presents descriptions of some new species of ( lolorado < >rthoptera. The 

 species described as new belong to a number of genera including Nemobius, Aeolo- 

 plus, I [esperotettix, etc 



T. D. A. Cockered discusses the bees of the genus Nomada found in Colorado. The 

 collection examined by the author contained 29 species, 15 of which are described 

 as new. 



Report of the entomologist, C. P. Gillette ( Colorado Sta. Rpt. 1904, j'j>- 91- 

 93). — Brief notes are given on the injurious insects of the year. Thorough treat- 

 ment is said to reduce the injury from the codling moth to about 5 per cent. Notes 

 are also given on potato Ilea beetle, woolly aphis, apple aphis, black peach aphis, 

 cottony maple scale, rose scale, species of Chermes on pine and spruce, grasshoppers, 

 cutworms, and Anabrus simplex. 



On some injurious insects of 1904, R. S. Macdougall (Trans. Highland mid 

 Agr. Soc. Scotland, .',. ser., 17 (190.5), pp. 212-228, figs. V,).— The black currant-gall 

 mite continues to cause, great damage. In controlling this pest it is necessary to 

 dig up and burn affected bushes. The cabbage maggot is least injurious to early 

 sown plants. Cabbages may also be protected by means of tarred paper, the use 

 of kerosene about the plants, or bisulphid of carbon. Economic and biological 

 notes are also given of Sirex juvencus injurious to woodwork, Helophorus rugosus on 

 turnips, grain and rice weevils, and grain flies in oat fields. 



Insects injurkms to shade trees and ornamental plants, J. B. Smith f Nejut) 

 Jersey Stas. Bui. 181, pp. 50, pis. -A figs. .1). — The disadvantages with which city 

 shade trees have to contend in securing plant food and suitable aeration for the 

 roots are briefly outlined. 



The greater portion of the bulletin is occupied with a discussion of the appear- 

 ance, distribution, natural enemies, and artificial means of repressing plant lice, leaf 

 hoppers, scale insects, borers, leaf-eating caterpillars, and other pests of shade trees. 

 The most important scale insects discussed are cottony maple scale, tulip soft scale, 

 oyster-shell bark-louse, scurfy scale, San Jose scale, and Pxrttdococcus aceris. 

 Among the leaf-eating insects particular mention is made of white-marked tussock 

 moth, bagworm, fall webworm, elm-leaf beetle, and sawflies. 



Brief directions are given regarding the selection of insecticide machinery and 

 preparation of suitable insecticides for use on shade and ornamental trees. 



