613 



MoKRZECKi (S. A.) & Bragina (A. p.). OTHeTT> 3HTOMonorMMecKaro 

 Ka6MHeTa CajimpcKOH OnbiTHOii riJiOAOBOACTBeHHoPi CraHuiM sa 

 1 9 13- 1 9 14 rr. [Report of the Entomological Laboratory of the 

 Experimental Horticultural Station of Salgir for 1913-1914], 

 Simferopol, 1915, 9 pp. 



This is the first report for the first two years of the existence of the 

 Laboratory and* a brief summary of the work done there is given. 

 Observations on Ci/dia pomonella showed that 19| per cent, of the 

 caterpillars hibernating in 1913 were infested with Tachinid parasites, 

 while in 1914 this number reached 27 per cent. In 1913, only one 

 generation occurred, the majority of the caterpillars of the first 

 generation having hibernated, but in 1914 this was the case only with 

 a small number and two full generations were on the wing, there 

 being traces of a third generation also, as some freshly hatched cater- 

 pillars were found at the end of September. Trichogramma Jasciatum 

 Perk, (embri/ophagus), and T. setnhlidis, Aur., both occur in the Crimea. 

 The former infests about 1| per cent, of the eggs of Cpomonella, 

 while the latter was not found in these eggs in the open, where it 

 attacked eggs of Barathra brassicae, Phytometra sp., Pieris rapae and 

 others ; in the laboratory, however, it freely infested them. Twenty- 

 five generations of T. jasciatum were reared from one parasite, without 

 any males making their appearance, at a temperature of 32° C, the 

 whole development from the moment of infestation to the imago 

 lasting rather less than 8 days. Large outbreaks of Lymantria dispar 

 occurred in 1912 and 1913. About 25 per cent, of the caterpillars 

 were infested by Tachinids, while about 10 per cent, perished from 

 flacherie. The number of the pupae was also reduced by Tachinids. 

 As many as 5 local species of Psylla were identified. P. pyrisuga had 

 one generation in 1913, while in 1914 the females issued in September 

 from their hibernating places and proceeded to oviposit, which shows 

 that the number of generations of this insect may vary with the 

 climatic conditions. Studies were also conducted on Eucosma 

 {Tmetocera) ocellana, F. ; Recurvaria {Geleckia) nanella, Hb. ; Coleo- 

 phora gryphipennella, Bch. ; C. anatipennella, Hb. ; Olelhrentes 

 variegana, Hb. ; Tinea fuscipunctella, Hw. ; Torlrix {Pandetnis) 

 corylana, F. ; Tortrix (Cacoecia) crataegana, Hb. ; Cerostoma persi- 

 cellum, F., and some others. Observations on Ino ampelophaga tend 

 to show that the number of its generations depends on climatic con- 

 ditions ; in 1914, two generations were on the wing and oviposited, 

 but some of the caterpillars of the first generation, as well as those of 

 the second, remained over the winter. 



Emphytus truncatus, Kl. {fulvipes, Fall.), produced four generations 

 in one sunmier ; parthenogenesis was observed in this sawfly. although 

 males exist. Stores of dry tobacco were injured by Ephestia elutelki, 

 Hb., the life-history of which has also been studied, as well as that of 

 Rhynchites pauxillus, Germ., a new parasite of which was reared, the 

 Mymarid, Anaphinis sp., infesting as much as 18^ per cent, of its eggs. 

 Against Gryllotalpa gryllotalpa, L., successful experiments were carried 

 out under natural conditions with sodium arsenite and carbon 

 bisulphide. MeJusoma (Lina) populi, L., M. tremulae, F., Ewproclis 

 (Porthesia) chr/fsorrhoea, L., Malacosoma {Gastropacha) neiistria, L. and 

 Tortrix laevigana were also investigated. 



