454 EXPERIMENT STATION EECOBD. 



Chortophila trichodactyla, a hitherto unknown enemy of young cucumber 

 plants in lower Silesia, O. Obekstein (Ztschr. Pflanzenkrank., 24 (1014), A'o- 7, 

 pp. 385-388; abs. in Internat. Inst. Agr. [Rome'\, Mo. Bui. Agr. Intel, and Plant 

 Diseases, 6 (1915), No. 3, p. 478). — Some SO per cent of the cucumber plants in 

 a half acre field at Lampersdorf from which specimens were sent were infested 

 with this dipteran. 



[Injury to corn by the frit fly], T. Shtchebbakov (VQstnik Russ. Selsk. 

 Klioz., No. .'f3 (.1914), pp. 10-12; luzh. Russ. Selsk. Khos. Gaz., No. 46 (1914), pp. 

 8, 9; abs. in Rev. Apl. Ent., 3 (1915), Ser. A, Nos. 2, p. 98; 3, pp. I48, 149).—N 

 report of observations of injury to corn by the frit fly (Oscinis frit) at the 

 Shatilov Agricultural Experiment Station in 1914, This is said to be the first 

 record of its attack upon corn. 



Experiments in controlling larvae of Melolontha by means of carbon bisul- 

 phid, E. V. ZviEREzoMB-ZuBKOVSKY (Abs. in Rev. Appl. Ent., 3 (1915), Ser. A, 

 No. 5, pp. 228, 229). — A report upon esi)erinients with Melolontha melolontha 

 and M. hippocastani conducted in the nursery of the Vasilkovsk forest, of the 

 Government of Kief. 



Digging operations undertaken in various parts of the nursery showeil an 

 average presence of 16 larvte in about 5.5 sq. ft, while in the adjoining woods 

 only 2 or 3 larvoe were found in the same area. A total of 191 larvce were col- 

 lected in 12 holes, each 28 by 28 by 28 in. The diggings showed that at the 

 beginning of May the larvie were more or less equally distributed over various 

 depths, in the middle of May they predominated at a depth of 14 in., and after 

 the end of M;iy at a depth of 7 in. At the beginning of August single pupje were 

 found at a depth of IG to 19 in. 



In the experimental iiitri)duction of carbon bisulphid into the soil by means of 

 an injector it was found that a dose of 4 gm. injected to a depth of 3 or 4 in. 

 produced only 8 per cent of stupefied larv.-e ; the same amount injected to a depth 

 of 5 or G in. produced 15 per cent, while 5 to 7 gm. injected to a depth of G or 7 in. 

 destroyed all the larviB, 35 gm. being sufiicieut for an area of 5.5 sq. ft. The 

 stupefied larviB died in 1 or 2 days. In addition to larvie of Melolontha. larvse 

 of Anomala aenea, of Phyllopertha horticola, and of some other Scarabseidae were 

 found. 



The dried-fruit beetle (Carpophilus [Scarabaeus] hemipterus). E. O. Essio 

 (Jour. Econ. Ent., 8 (1915), No. 4. pp. 396-400, figs. .J).— This beetle is a source 

 of some anxiety to fruit growers and considerable worry to fruit packers and 

 grocers throughout California. 



Honeybees: Wintering, yields, imports, and exports of honey. S. A. Jones 

 (U. S. Dept. Agr. Bui. 325 (1915), pp. 1^).— The data here presented are based 

 upon returns from about 650 honey producers in ^42 States, covering 80,000 

 colonies of bees. 



The Texas foul brood law, B. Yoitngblood (Texas Sta. Circ. 8, n. ser. (1915). 

 pp. 3-9). — The text is given of the foul brood law, which became effective in 

 June, 1914. 



A revision of the North American ichneumon flies of the subfamily 

 Opiin», A. B. G.\han (Proc. U. S. Nat. Museum, 49 (1915). pp. 63-95, pl^. 2).— 

 This revision includes a bibliography of the genera of Opiina? and their synonymy, 

 and keys to the genera and to the species of Opius. Fifty-seven species are rec- 

 ognized, all but two of which belong to the genus Opius, of which 19 are describe<l 

 as new to science. 



Among the new species are Opius tnandibularis from an agromyzid in leaves 

 of chrysanthemum at Washington, D. C. ; 0. foersteri, parasitic on Eulia triferana 

 (^Lophoilerus incertuna) at Ivirkwood, Mo.; and 0. gracillance, reared from 

 Oracillaria desmodiella at Kirkwood, Mo. 



