514 



BiELOUSSOV (V.). KopotAbI ctsepHblXlD CaflHTj. [The Scolytids of 

 the North Sayansk Mountains.] — ^«PycCKOe 3HT0M0J10niHeCK0e 



0603p'tHie.» [Revue Russe d'Entomologv'], Petrograd, xvi, no. 3-4, 

 14th May 1917, pp. 334-337. [Received 12th September 1917.] 



The following list is given of the Scolytids collected by the author 

 in 1915 in the Northern Sayansk Mountains (Province of Yenissei, 

 Siberia). 



In Betula verrucosa : Scolytus (Eccoptogaster) ratzeburgi and Xyloterus 

 signatus. In Larix sibirica : Ips laricis and Xyloterus lineatus. In 

 Pinus silvestris : Ips sexdentatus, I. typographus, I. laricis, I. suturalis, 

 I. subelotigatus and Dryocoetes autograpJius. In Pinus cembra : 

 Hylastes glabratus, Pityogenes bistridentatus, P. chalcographus, Ips 

 sexdentatus, I. laricis, Pityophthorus onicrographus and Xyloterus 

 litieatus. In Abies sibirica (Siberian silver fir) : Carplioborus rossicus, 

 Xylechin-us pilosus, Hylastes glabratus and Xyloterus lineatus. In 

 Picea obovata (Siberian spruce) : Carplioborus rossicus, Xylechinus 

 pilosus, Polygraphus subopacus, Hylastes glabratus, H. palliatus, Pityo- 

 genes bistridentatus, P. chalcographiis, Ijjs typograplms, I. laricis, 

 I. subelotigatus, Pityophthorus micrograpihus, Dryocoetes autograjjJms 

 and Xyloterus lineatus. 



As may be seen from this list, the Siberian silver fir, although the 

 most widespread tree in Sayansk, has no species of bark- eaters peculiar 

 to it, owing principally to the amount of pitch in the bark and wood ; 

 it is however attacked by the beetles common to the Siberian spruce, 

 both trees usually growing in the same places. 



TuASON (D. R.). A Study of Cucurbitaceous Vegetables in the Philip- 

 pines. — Philippine Agriculturist & Forester, Los Bancs, v, 

 no. 10, February 1917, pp. 315-342, 6 plates. 



Cucurbitaceous plants in all stages of their growth are very suscep- 

 tible to the attack of insects, those doing most damage including a 

 small black ant that enters the seed and devours the contents as soon 

 as the embryo ruptures the seed-coats. Powdered naphthaline on 

 the surface of the soil acts as a preventive, or the seeds may be pro- 

 tected by growing them in fiats or seed-boxes placed on a table, the 

 legs of which are placed in small cans filled with water. Cutworms 

 attack the stems of old and young plants, especially newly-trans- 

 planted ones, while the yellow beetle, Aidacophora coffeae, Hornst., 

 eats the soft parts of the leaves, leaving only the skeleton. An effective 

 remedy is ashes, or Paris green, mixed with lime in the proportion of 

 one part Paris green to thirty parts of lime by weight, applied as soon 

 as new leaves are formed. The squash-vine borer [3Ielittia satyrini- 

 formis] attacks the plants without showing external injury and is best 

 dealt with by trap-plantings, which are afterwards burned or jiloughed 

 under, deep enough to kill the larvae and destroy the eggs at the same 

 time. Plants may be rendered more vigorous and better able to resist 

 this pest by the formation of adventitious roots at their joints, induced 

 by hilling. Melon lice [Ajjhis gossypii] attack the leaves, and a control 

 measure must be employed as early as possible, the best being the 

 application of kerosene emulsion. This is made by dissolving half a 

 pound of soap by heating it in one U.S. gallon of water in a tin vessel, 

 and, while still hot, two U.S. gallons of kerosene are added, little by little 



