752 EXPK1{IMENT STATION RECORD. 



borhood of Alexandria and the coast, the government f?ardens at Delta Barrage 

 have l)e(>n cleared of this jiest. 



The species belonging' to the genera Ceratitis, Anastrepha, and Dacus, 

 M. P.EZzi Hiol. Lab. Zoo/. (Uii. c Af/r. A'. Kciiola t<ui>. Apr. Portici, 3 {1909), pj). 

 273-313. /if/s. ■}). — A list is given of the species of each genns with their distribu- 

 tion and tables for separation. Eighteen s[)ecies are recorded as belonging to 

 Ceratitis, 19 to Anastrepha, and 07 to Dacns. An extensive bibliography is 

 a PI tended. 



New genera and species of North American Corrodentia, G. Knderlein 

 iB'il. Lab. Zool. (Icii. c At/r. R. Sainln Hitp. Agr. Portici, 3 {1909), pp. 329-339, 

 flys. .'i). — Three genera and G species, including 2 myrmecophilous forms {Myr- 

 mococlipneUa aptcra n. g., n. sp. from the nest of Leptothorax nitens and 7'/oc- 

 tes prenolepidis n. sp., from the nest of Prenolcpis: imparis in California), are 

 described as new. 



A contribution to the knowledge of the Thysanoptera, P. Buffa {lUA. 

 Lab. Zool. (Icit. c Agr. Ix'. Hcuola Hup. Agr. Portici, 3 (HJ09), pp. 193-196, figs. 

 3). — Two genera of Tnbniifera are erected for 2 new siiecies. 



A contribution to the knowledge of the Italian Lachnini, G. del Guercio 

 {Redia, 5 {1908), No. 2, pp. 173-359, pl.s. 12. figs. ,?.^).— The morphology, classifi- 

 cation, general biology, and economic importance of the genera Trama, Stoma- 

 phis, Dryaphis, Lachnus, Lachniella, and Eulachnus, which compose this tribe 

 of plant lice are considered. Tables are given for the separation of the species 

 and numerous pen drawings are included. 



Plant louse notes, family Aphididse, C. P. Gillette {Jour. Econ. Ent., 2 

 {1909}, Ao. 6, pp. 385-388, fig. 1). — Notes are giv(>n ou the occurrence of a 

 number of species of aphids of the subfamily Lachninse. 



A new enemy of the Florida orange, E. A. Back {Jour. Econ. Eiit,, 2 

 {1909), Ao. 6, pp. >}.'/S, ////.y). — An account of the occurrence of Aleyrodes howardi 

 in injurious numbers on orange trees at Tampa, Fla., as previously noted 

 (E. S. R., 22, p. 2.54). 



The San Jose scale. — Some sprays for its control, C. G. Woodbury {Indi- 

 ana Sta. Bui. 138, pp. 75-86, figs. 7). — Following a brief introductory account 

 of the San Jose scale, the author reiiorts upon the results obtained from the 

 use of a number of insecticides during the years 1907, 1908, and 1909. All of 

 these, with the exception of some tests with kerosene, were applied during 

 March, examinations being made in early June and again in the fall. 



Hammond's arsenated petroleum emulsion diluted with an equal ^-olume of 

 hot water was used on Ben Davis apple trees with but little beneficial effect. 

 Crude oil was thoroughly effective in killing tlie scale, but the risks of injury 

 are considered too great to wfirrant its use. Hammond's Horicum, a ])repara- 

 tion of lime, sulphur, and other materials, was used at a dilution of 1 to 15, but 

 its action was not decided enough to warrant its recommendation as a spray 

 material. Kerosene emulsion, 1 : 9, and 1 : 4, made with naphtha soap and 

 cold water was used late in the spring, when the leaves were partly gi'own. 

 The young apple leaves were not seriously injured by the weaker spray, but on 

 comparing with the unsprayed checks, no effect on the scale was apparent. 

 The stronger emulsion killed the scale and the young foliage as well. Gras- 

 selli's lime sulphur, 1 : 11, was used on 30 trees, 26 of which were freed from 

 the scale, 2 were slightly infested, and on 2 the scale was quite plentiful when 

 the trees were examined in June. This material at the dilution used is 

 thought to be equal to the homemade solution in effectiveness. Rex lime 

 sulphur, 1 : 11, was used on peach and apple trees in comparison with the 

 homemade lime sulphur. Both were effective, only an occasional live scale 

 being found in October, following the March spraying of several hundred 



