10101 ECONOMIC ZOOLOGY — ENTOMOLOGY. 653 



Olethreutes variegana. a microlepidopteran injurious to fruit trees in 

 Italy, A. BABSA (Hoi. Lab, Zool. Qen, e Ayr. R. Seuola Sup. Ayr. l'orli<i. 12 



(1918), pp. VfS-181; abt. in Interna*. Intt. Ayr. [Rome], intcmat. Rev. Sot. ottd 

 Proct. i'//.. 9 (H>ts\, No. 5, pp. 645, 846). a report of morphological and bio- 

 logical studies of a lepidopterftD which attacks common medlar, attUOHd, 

 mahalolt, plum, apricot, and apple trees in the districts of Santerama Oolle 

 (Apulia) and Bfatera (BaalUcata), Italy, it occurs in central and southern 

 Europe, Livonia, Finland, Sweden, and Asia Minor. Studies of its parasites 

 have shown five species to aCt as important ehoeks. 



A parasite identified as belonging to the genus Copidosoma Is said to he a 

 poly embryonic form. 



Two new instances of polyembryony among the Encyrtidre, L. O. Howard 

 (Science, n. set:, ! t 9 (1919), No. 1254, PP- 45, 44)- — The author refers to obser- 

 vations In Italy in which It is shown that Eneyrtus vafUcornfa, a parasite of 

 Anartie UneateUa, and Copidosoma sp., reared from the larva of OU threutcs 

 variegana, are polyembryonlc forms. 



A contribution to the biology of North American Diptera, C. T. Orkknk 

 (Proc. Ent. Boc. Wash., 19 {1917), No. /-.}, pp. 11,6-161, jtffs. 99).— Notes are 

 presented on a number of dipterans reared by the author, all of which hiber- 

 nate in the larval stage. Of these the larva? of Mydas da rut us and Dasylli* 

 thoraeicu are predacious on coleopterous larva*, and the larva of Pasyllls is 

 a secondary wood borer in addition to being predatory. 



The identity of the wheat midge in Ontario, W. A. Ross (Canad. Ent., 51 

 (1919), No. 1, p. 16, fig*. 2). — A study of the wheat midge or " red weevil," 

 which reappeared in Ontario In fairly large numbers in 1917 and in lesser 

 numbers in 1018. led to the discovery that the species concerned Is Thccodi- 

 plosis mosell&na. 



The rose midge in Ontario, W. A. ROSS (Ayr. Gas. Canada, 6 (1919), No. 2, 

 pp. 137, 138, fly. 1). — A brief account of the rose midge, which was first dis- 

 covered in Ontario in 1014 in a large rose garden near London. 



The lake mosquito. Mansonia titillans, and its host plant. Pistia stratiotes, 

 in the Canal Zone, Panama, L. H. Dunn (Ent. News, 29 (1918), Nos. 7, pp. 

 260-269; 8, pp. 288-295).— An extended account of M. titillans, termed the lake 

 mosquito on account of its abundance in the lake regions. Since the formation 

 of Gatun Lake this mosquito has Increased in abundance simultaneously with 

 the spread of water lettuce (/'. stratiotes) . which acts as a host plant by fur- 

 nishing the larva 1 and pup.T with their necessary air supply. 



An improvised method for oiling sluggish streams continuously for the 

 prevention of mosquito breeding, B. E. Kirwan (V. &, Naval Med. Bui. Sup. 

 7 (1918), pp. 57, 58). — A brief account of the method used by the author is given. 



Dohrniphora venusta in Sarracenia flava, F. M. Junks (Ent. Neus, 29 

 (1918), No. 8, pp. 299-302, pi. /).— A report of studies of the life history and 

 morphology of this phorid, which develops in the insect remains in the pitcher 

 plant. 



Notes on North American Tachinidae, including the description of one new 

 genus, B. E. Smith (Proc. Ent. Soe. Wash.. 19 (1917), No. /-.}, pp. 122-126).— 

 Included in these notes are descriptions of a new genus and species, under the 

 name SpUochaetoooma eaKforntca, from Claremont. Cal. 



Three new tachinid parasites of Eleodes. W. B. \Yat.ton (Proc. Ent. Soc. 

 Wash., 19 (1917). No. /-.J. pp. 22-26, fiys. 8). — Elrodiphaya eaffreyi n. g. and 

 n. sp. from Eleodes c.rtrieata at Maxwell, N. Mex., and E. obsoleta at I'rescott, 

 Ariz.; E. pollinosa n. sp., reared from E. hispilahrus at Maxwell, N. Mex.; and 

 Biomyia eleodirora n. sp., from E. trieostata at Holdredge, Nebr., are described. 

 116338°— No. 7—19 5 



