ECONOMIC ZOOLOGY — ENTOMOLOGY. 757 



livinc; and dying claestnut, oak, beech, and ironwood in the Southern. Middle, 

 and Eastern States. The larvaj mine in the inner bark and outer wood in 

 such a manner as to girdle the trees. 



It is pointed out that insects are more or less responsible for primary 

 wounds through which the spores of the chestnut blight disease find entrance 

 to the living tissue. 



Insects bred from cow manure, F. C. Pkatt (Canad. Ent., .'/// (1912). No. 6, 

 pp. 180-18'i). — This annotated list, which is supplementary to that published 

 by L. O. Howard in 1001, contains 31 species of Diptera, IT of Coleoptera, 

 and 1 of Lepidojttera. 



[Lime-sulphur v/ash. and lead arsenates], R. IIarcourt (Ontario Agr. Col. 

 and Expt. Farm Rpt. 1911, pp. 85, S6). — In continuation of investigations of the 

 effect of adding lime to lime-sulphur, the author confirms the results previously 

 obtained (E. S. R.. 25, p. 50G), finding that there is no objection whatever to the 

 practice of adding lime to lime-sulphur spray, provided the lime is not put in 

 until after the necessary cpiantity of water has been adde<l to the concentrate 

 to dilute it to the recpiired strength. Analyses of 9 of the more common com- 

 mercial brands of lead arsenate on the market are reported. 



The Minnesota flytrap, F. L. Washburn (Minn. State Ent. Circ. 2ff, 1912, pp. 

 3, figs. 3). — A successful device for catching flies in enormous numbers, which 

 has recently been constructed and put to a practical test by the Minnesota 

 Station, is described and illnstrate<l. 



Locusts and some of their parasites (Bol. Min. Agr. Indus, e Com. [Rome], 

 Ser. C, 11 (1912), No. 2-3, pp. 30-52, figs. 25). — This paper records observations 

 made in 1010-11 during an invasion, of tlie Province of Palermo, Sicily, by 

 Dociostaurus (Stanronotus) mnrnccanus. The insect and other parasites of 

 locusts are discussed and references given to the literature. 



The control of thrips on tomatoes, J. R. Watson (Fla. Groirrr, 6 (1912), 

 No. 9, pp. .'i, 5). — ^An outbreak of thrips (Euthrips tritici) over most of Florida 

 occurred in the spring of 1012, the most serious injury being done in tomato 

 fields and citrus groves. 



"The young upon hatching at once attack the tenderest iTart of the blossom 

 or bud. . . . This turns black and shrivels up. Soon afterwards the whole 

 flower turns yellow and falls off. If this is repeated for all the blossoms on the 

 first 3 or 4 stands (as was often the case this year) the crop Is ruinously 

 shortened." 



A mixture consisting of commercial lime-sulphur 2J qt., black-leaf 40 3i fluid 

 ounces, and water 50 gal., which has been used effectively against the orange 

 thrips in California, was applied during April, 1912, and killed about 75 per cent 

 of the thrips present. 



A new genus and three new species of North American Thysanoptera, 

 J. D. Hood (Psyche, 19 (1912), No. 4, pp. 113-118, pis. 2) .—HeHothrips phnseoU, 

 one of the species here described, as new, is reported as very injurious in 1908 to 

 beans in the region of Brownsville, Texas. "Its ravages were so severe that 

 the plants became yellowish and the crop was greatly diminished. Across the 

 Rio Grande in Mexico, near Matamoras, it was found on a species of wild bean 

 which grew along the river bank; and for this reason it would appear that the 

 species is a native one which has lately turned its attention to the cultivated 

 bean." 



Some considerations in regard to the classification of the order Thysanop- 

 tera, R. S. Bagnaxl (Ann. and, Mag. Nat. Hist., 8. ser., 10 (1912), No. 56, pp. 

 2^0-222) .—The author erects the new suborder Polystigmata for the reception 

 of the family ITrothripidse. 



