ECONOMIC ZOOLOGY ENTOMOLOGY. 847 



leaf tissue brown. . . . Arseuate of lead (acid) and arsenate of lead (non- 

 acid) did not cause injury in any case when used alone. In experiments with 

 ar.senite of zinc, etc., where injury did occur, the injury did not begin to show 

 up badly for about 5 days, when suddenly, overnlnht, it appeared at its worst. 

 The check trees, sprayed with water, did not show injury. . . . 



"Arsenite of zinc is u quicker-acting poison than arsenate of lead, acid or 

 nonacid, and remains in suspension much better. Acid arsenate of lead is a 

 quicker-acting iH)ison than the nonacid and remains in suspension better. Non- 

 acid arsenate of lead is slow in its action, but is satisfactory in that death 

 finally occurs. Lime-sulphur in the experiments conducted has not proved to 

 have much value as a stomach poison. Lime-sulphur with arsenicals seems to 

 retard to a more or less extent the action of the x»oison, and it is possible for 

 larvje to feed on foliage sprayed with weak strengths of lime-sulphur plus 

 arsenate of lead and recover, if transferred to fresh foliage within a few days. 

 . . . Lime-sulphur probably acts as a repellent to biting insects in the same 

 way that Bordeaux does against the potato flea-beetles." 



The larvto of tent caterpillars {llalacosoma crosa and .1/. i)liiviaUs) were 

 used in the experiments. 



Beport on injurious insects in Finland, 1911 and 1912, E. Reuteb (Landtbr. 

 Sti/r. Mcddcl. [FiiilaiuU, Nos. S7 {191J,), pp. 18; 93 {WW, pp. i.'/).— These 

 aiuiual rei)orts of the entomologist of Finland discuss the occuri'ence of the 

 more imiwrtant insect enemies of crops during the years 1911 and 1912. 



Report of the imperial pathological entomologist, F. M. Howlett {Rpt. 

 lilt: Research In^st. utid Col. Fusa, 1912-13, pp. 78-83). — A brief report of the 

 work of the year with ecto-parasites, fruit flies, etc. 



[Annual report of the government entomologist of Uganda], C. C. Gowdey 

 (.-inn. Rpt. Dcpt. Agr. Uf/anda, 191 Ji, pp. .3(]-o8). — The author here reports oh 

 the more important insect enemies of the principal crops of Uganda, particu- 

 larly of coffee and cotton. The yellow-headed coffee borer (Dirphya [Nitocris] 

 princeps) and the coffee-berry borer {Steplnmoderus coffccc) which attack 

 coffee, and the spiny bollworm {Earias insuUina), Oxycarcnus hyalinipennis, 

 and the leaf-footed plant bug {Lcptoglossun memhranacem), which attack cot- 

 ton, are given particular consideration. 



Proceedings of the German Association of Economic Entomology, edited by 

 K. EscHERiCH and F. Schwangart (Ztsehr. jinycw. Ent., 1 {191.'i), No. 1, pp. 

 2.'i0. pis. 3. fi'js. 61). — The papers presented at the first annual meeting, held at 

 Wiirzburg, October 21 to 24, 1913, include the following: The Aims and Prob- 

 lems of the German Society of Economic Entomology, by K. Eseherich (pp. 

 14-19) ; The Fight Against the Grapevine Phylloxera in Prussia, by E. H. 

 Eiibsaamen (pp. 20-19) ; The Vine Phylloxera in Franconia, by Orth (pp. 50- 

 58) ; Experimental Demonstration of a Biological Race Difference in the 

 Phylloxera from Lorraine and from Southern France, Peritymbia (Phylloxera) 

 fitifoUi pcrvasidtrix, by C. Borner (pp. 59-07) ; Economic Entomology in Italy, 

 by R. Heymons (pp. 0S-S3) ; Economic Entomology in Germany, by L. Reh (pp. 

 84-94) ; Economic Entomology in the German Colonies, by G. Aulmann (pp. 95- 

 136) ; The Royal Institution for Bee Keeping, Investigations at Erlangen, by 

 E. Zander (pp. 137-140) ; The Biology of the Tsetse Flies, by E. Teichmanu (pp. 

 147-159) ; A Kew Grain Pest in Hungary (Halmeule: Tupinostola inuneulo.'ia), 

 by J. Jablonowski (pp. 160-171) ; The Habits of Dipterous Parasites of Cater- 

 pillars (Raupenfliegen), by H. Prell (pp. 172-195) ; The Mulberry or West 

 Indian I'each Scale and Its Control by Parasite.s, by J. BoUe (pp. 190-213) ; 

 Economic Entomology and Bird Protection, by K. Haenel (pp. 214-222) ; and 

 The African Silkworms and Their Agricultural Importance, by A. Schultze 

 (pp. 223-231). A list of the members is ai)i)ended. 



