195 



seems unimpaired. The effects of the second generation are much 

 more marked, about 40 per cent, of the host-scales being attacked 

 and destroyed long before attaining sexual maturity. The abimdance 

 of the host is so greatly limited by this parasitism that it seldom 

 attains sufficient numbers to constitute a pest, in spite of its great 

 fecundity. Although the rate of production of E. capreae is more 

 than 48 times that of Lepidosaphes ulmi, its abundance is checked so 

 much more effectively by parasites that it is a far less important pest. 



FuLMEK (L.) & Karny (H.). Einige Bemerkungen iiber Drepano- 

 thrips auf dam Weinstock. [Remarks on the Drepanothrips of 

 the Vine.] — Zeitschr. f. Pflanzenkrankh., Stuttgart, xxv, no. 7, 

 nth Dec, 1915, pp. 393-398, 3 figs. 



In Lower Austria in May 1915 a small number of a species of 

 Drepa7iothrips was found on Vitis riparia. Only two species of this 

 genus, D. reuteri, Uz., and D. viticola, Mokr., are known at present, 

 and these are considered by some authorities to be identical. 



D. viticola has been recorded from Russia and the Caucasus on 

 the leaves of the vine {Vitis vinifera), the female hibernating under 

 the bark and in the ground, and appearing on the leaves in April. 



D. reuteri has been recorded in Italy on vines and in Bohemia on the 

 leaves of various trees, particularly oak, beech and hazelnut, the 

 females appearing in August and September and the males in Sep- 

 tember. 



In Sicily it attacks all parts of American vine-stocks (F. riparia 

 and others). According to Pantanelli only the female is found in 

 spring on vines. The adults occur on the earliest leaf -buds, and the 

 larvae on both surfaces of the leaf, especially of V. riparia and its 

 hybrids in damp places, seldom on F. rupestri's or in dry places. 

 The eggs are laid singly in the leaf-web. The female hibernates 

 and there are at least two generations a year — one in spring and 

 one in summer. 



A table is given of the measurements of the imago obtained by 

 Pantanelli and those obtained by the authors, with the result that 

 the species found in Italy is considered identical with that from 

 Lower Austria. If D. viticola is specifically different from B. reuteri, 

 which they do not consider to be yet proved, the insect from Lower 

 Austria is in all probability B. viticola. 



MiJLLER (H. C.) & MoLz (E.). iJber zwei seltene, aber gefahrliche 

 Schadlinge : Urocystis cepulae, Frost, iind Galeruca tanaceti, 

 Leach. [Two rare, but dangerous pests : Urocystis cepulae, Frost, 

 and Galeruca tanaceti, Leach. J — Zeitschr. f. Pflanzenkrankh., 

 Stuttgart, xxvii, no. 2-3, 25th April, 1917, pp. 103-106, 4 figs. 



The second part of this paper deals with Galeruca tanaceti, Leach, 

 and the damage done by this beetle to rhubarb, turnips, radishes, 

 onions, potatoes, etc. The first pupae were observed on 5th June 

 and by the 15th of that month all the larvae had pupated, the first 

 imago appearing four days later. The larvae feed on a great variety 

 of plants, only beans and peas being immune. Arsenical prepara- 

 tions should be successful against this pest. 



