261 



loses about 30 per cent, of its germinating power. As regards the 

 extermination of rats on ships, all the rats experimented with were 

 destroyed after 2^ hours exposure, the fleas infesting them being 

 killed in even less time. 



Thompson (W. R.). Sur les Dipteres Parasites des Isopodes terrestres. 

 —C. R. Soc. BioJ., Paris, Ixxxiii. no. 13, 17th April 1920, 

 pp. 450-451. 



In a previous paper [R.A.E., A. vi, 35] the author described the 

 larval forms of Phyto inelanocephala, a Dipterous parasite of wood- 

 lice. Later investigations have disclosed the fact that the larval 

 stages ui question belonged to two distinct species, P. melanocephaJa 

 and Melanophora roraJis. All the larval stages of both flies have been 

 studied and their characteristics are described and compared. A third 

 species has also been discovered, having the same habits as the 

 above. The larva resembles that of M. roralis, from which, however, 

 it is easily distinguishable. Unfortunately, only one larva has as 

 yet been obtained, and the adult has not been reared. 



Wahl (B.). Die wichtigeren tierischen Schadlinge unserer gebrauch- 

 lichsten Gemusearten. [The more important animal Pests of 

 our most common \'egetables.] — Mitt, landw.-bakter. u. Pjianzen- 

 sckutzstalion, Yienna [n.d.], 70 pp., 20 figs. [Received 27th April 

 1920.] 



The insects dealt with include a thrips, Physapns vulgatissima, Hal. 

 Orthoptera : — Gryllotalpa gn/Jlotalpa, L. {vulgaris, Latr.) ; and Forficula 

 auricularia, L. ; Coleoptera: — Melolontha melohntha, L. ; M. hippo- 

 castani, F. ; Amphimallus solstitialis, L. ; various Chrysomelids ; 

 Meligethes aeneus, F. ; Sitones lineafus, L. ; CeutJimihynckus sulcicollis, 

 (lyll. : C. assimilis, Payk. ; C terminatus, Hbst. ; Bruchus pisorum, L. ; 

 Agrioles lineatus, L. Lepidoptera : — PoJia {Mamestra) oleracea, L. ; 

 Barathra (M.) brassicae, L. ; Polia (M.) pisi, L. ; P. (M.) persicariae, 

 L. ; Phytofnetra (Plusia) gamma, L. ; Pieris brassicae, L. ; P. rapae 

 L. ; P. napi, L. ; Evergestis extimalis, 8cop. ; Depressaria apicella 

 {nervosa). Diptera : — Bibio Jiortulanus, L. ; B. marci, L. ; Phorbia 

 {Chortophila) brassicae, Bch. : Hyhmyia anfiqua, Meig. ; Eumervs 

 strigatus, F. ; Psila rosae, F. : Athomyia radicum, Meig. ; A. {Chorio- 

 phila) floralis, V'dW.; Aphis rnmicis, L. {papaveris, F.); Eurydema 

 oleraceum, L. ; E. ornalum. L. ; E. feslivum, L. ; HaUicus saUator, 

 GieofEr. The Nematodes, Heterodera schachtii, Schmidt, H. radicicola, 

 (ireef, and Tylenchus devastatrix, Kiihn : and a mite, Tetranychus 

 telarius, L. 



The various crops attacked and the damage done by these pests is 

 described and the usual remedial measures are advocated. 



FuLMEK (L.). Die Kirschblattwespe {Caliroa cerasi, L.) — Mitt. Pflanz- 

 enschutzstati(:n, Viewia |n.d.], 4 pp., 2 figs. [Received 27th 

 April 1920.] 



Eriocampoides limacina; L. {Caliroa cerasi, L.) caused severe damage 

 to pear and cherry trees in 1915. It is described and illustrated and 



