610 



Prell (H). Ueber Biolo^eformeln als zweckmassige Zusammen- 

 fassung wichtiger biologischer Daten von Insekten. L^iulo^ical 

 Formulae as an efficient Resume of im])ortant biological Data 

 referring to Insects.^ — Zeitschr. angeic. Ent., Berlin, viii, no. 1, 

 September 1921, pp/ 179-181. 



Some modifications of Rhumbler's symbols for representing the 

 life-history of insects [R. A.E., A, viii, 269] are suggested, with examples. 

 [Other rnodifications have been published by Bomer, R.A.E., A, 



ix. 547.] 



Friederichs (K.). Was ist " Silplia atrata " ? — Zeitschr. angeic. Ent., 

 Berlin, viii, no. 1, September 1921, pp. 182-183. 



Text-books deahng with insect pests usually refer to the carrion 

 beetles infesting young beet as SilpIia atrata. Most of the beet-infesting 

 carrion beetles recorded under this name belong to the three species, 

 Blitophaga opaca, L., B. iindata, Miill. {= reticulata, F.), and Silplia 

 obscura, L. The extent to which the last-named is involved is doubtful. 

 It is not clear whether S. nigrita, Creutz., and Thanatophilus riigosiis, 

 L., are occasionalh' injurious. 



L/ CliNs {W'.). Ueber die Schaden der Blattschneiderameisen in Siid- 

 Amerika. [The Damage done by Leaf-cutting Ants in South 

 America.] — Zeitschr. angew. Ent., Berlin, viii, no. 1, September 

 1921, pp. 183-184. 



Attention is called to the losses caused b}- one of the four or five 

 highlv destructive species of leaf-cutting ants, Atta spp., in Brazil. 



Newlv planted beds of cabbage seedlings may be almost destroyed 

 in a single night. All varieties of cabbages, turnips, radishes, roses 

 and peach leaves are particularly attractive, and young plants 

 are preferred. In the case of orange trees the ants climb the tree 

 and cut off the leaves. 



If the main nest is exposed, petroleum gives the best results, but 

 if it is deep underground the injection of sulphur fumes is a better 

 remedy. 



P.\x (F.). Hylastes angiistatiis als Schadling schlesischer Kiefern- 

 kulturen. [H. angnstatus as a Pest in Silesian Pine Plantations.] 

 — Zeitschr. angew. Ent., Berlin, viii, no. 1, September 1921, p. 185. 



Verv considerable injury to plantations of two and three-year-old 

 pines by a bark-beetle, Hylastes angnstatus, has been reported from 

 Silesia. H. angnstatus occurs throughout the province, but hitherto 

 important damage has not been noticed there. Taschenberg in 1879 

 recorded this beetle as a pest of pines in Hungary. 



EscHERiCH (K.). Gegen eine Beschrankung der Verwendung arsen- 

 haltiger Mittel im Weinbau. [Against a Restriction of the Use 

 of Arsenicals in ^'iticuhure.] — Zeitschr. angeic. Ent., Berlin, 

 viii, no. 1, September 1921, pp. 185-187. 



Further protests against the intention of the German Public Health 

 Ser\dce to restrict the use of arsenicals against the second generation 

 of the vine-moths [Clysia ambiguella, Hb., and Polychrosis botrana, 

 Schiff.] are published. 



