1917] ECONOMIC ZOOLOGY ENTOMOLOGY. 153 



Reports of the government entomologist, 1915 and 1916, C. Mason {Nyasa- 

 land Dept. Agr. Arm. Rpts. 1915, pp. 36-49; 1916, pp. 19-22) .—These reports 

 record the occurrence of the more important insect pests of the years and the 

 control measures applicable. 



Some new entomogenous fungi in St. Vincent, W. Nowelt, (Agr. Neics 

 [Barbados], 15 (1916), No. 363, p. 110). — Reference is made to a new species 

 of Cordyceps that attacks the larvae of Cryptorhynchus corticalis, a species of 

 Isarla on the larva of a root weevil, an undetermined fungus on the larvae 

 and adults of the cacao thrips (Heliothrips rubrocincta) , and undetermined 

 forms on the West Indian peach and purple scales. 



The lesser migratory locust (Melanoplus atlanis), G. W. Hekrick and C. H. 

 Hadlet, Jr. (New York Cornell Sta. Bui. 378 (1916), pp. 5-45, pis. 6, figs. 17).— 

 The lesser migratory locust, a native species widely distributed in the United 

 States and Canada, has at times been a most destructive pest. In 1893 and 1894 

 it caused considerable injury to crops in the western counties of New York 

 State, and during the past three years certain sandy sections of Clinton, Warren, 

 Saratoga, Fulton, and to a less extent other counties, were subjected to an ex- 

 ceedingly severe outbreak. Rye, oats, and corn are said to have suffered the 

 most, probably because they are the chief crops in the infested localities. 



Oviposition commences about the middle of July and continues until cool 

 weather sets in. The young nymphs, which hatch out in the spring, undergo 

 five molts before reaching maturity in June, there normally being but one 

 generation a year in New York State. 



Control measures consist of fall and spring plowing of the breeding places 

 to a depth of 6 or more inches, the use of the so-called Kansas poison bait, 

 the hopperdozer, and spraying with arsenicals. 



Brief notes are presented on related forms in New York, including the red- 

 legged grasshopper (M. femur-rubrum) , the two-stripped grasshopper (M. hivit- 

 tatus), the clear-winged locust (Camnula pcUuckla) the Carolina locust (Dis- 

 sostcira Carolina), and the green-striped grasshopper (Chortophaga viridi- 

 fasciata). 



A bibliographical list of 34 titles is included. 



The sugar-beet thrips, W. H. White (U. S. Dept. Agr. Bui. 421 (1916), pp. 

 12, pis. 2, figs. 8). — A report of studies at Washington, D. C, of the sugar-beet 

 thrips (Heliothrips femoralis), which is widely distributed in Europe and the 

 United States, occurring principally in greenhouses. It has been taken outof- 

 doors on sugar beets and sugar cane and has a large number of food plants. At 

 an average mean temperature of 73° F. the eggs required from 12 to 14 days 

 for development and the four nymphal stages required 4, 8, 1, and 5 days, re- 

 spectively. It was found that a spray, consisting of nicotin sulphate 6 oz., 

 fish-oil soap 4 lbs., and water 50 gal., destroyed all the adults and 95 per cent 

 of the nymphs. 



Technical descriptions are given of its several stages and a bibliography of 

 18 titles is included. 



The bedbug, C. L. Mablatt (TJ. S. Dept. Agr., Farmers' Bui. 754 (1916), pp. 

 12, figs. 4). — This replaces the publication previously noted (E. S. R., 14, p. 874). 



The chinch bug outbreak of 1910 to 1915, S. A. Forbes (Illinois Sta. Circ. 

 189 (1916), pp. 3-59, figs. i3).— This is a report of studies made during an out- 

 break of the chinch bug, the first beginnings of which were seen in Illinois in 

 the fall of 1909 and continued with growing intensity and gradually widening 

 area until the spring of 1915, when it collapsed. 



"A careful computation of losses resulting, based upon a comparison of 

 crop yields and crop conditions in 17 infested and 17 uninfested counties, shows 



