35 



rossi, A. nerii, and Parlatoria proteus on Ficus ; Apterotrix dubia, sp. n., 

 from Fiorinia on Acacia ; Aph/cus coccidiphagus, sp. n., from 

 Rhizococcus (?) on Leptospermum ; Bavanusia margiscuteUum, sp. n., 

 from Lepidosaphes {MytUaspis) casuarinae, Mask., on Casuarina ; 

 Zaommoencyrtus poeta, sp. n., reared from a supposed Psyllid larva 

 under the bark of Eucalgphis ; Amiscogaster ruskini, sp. n., reared 

 from a species of Icerya ; Dibrachys austrolia, sp. n., reared from the 

 larvae of Gydia pomonella ; Euryloma casuarina,e, sp. n., reared fi'om 

 galls on Casuarina; Acerafoneuromyia australia, sp. n., associated 

 with the fruit fly ; Dinoura eucalypti, sp. n., reared from a Chalcid in 

 galls on Eucalyptus; and Parachry Somalia secunda, sp. n., from 

 turpentine galls. 



Thompson (AV. R.). Sur un Dlptdre parasite des Isopodes terrestres 



{Pliyto melayiocephala, Meig.). [On a Dipterous parasite of 

 terrestrial Isopods.] — C. R. Soc. Biologie, Paris, Ixxx, no. 16, 

 20th October 1917, pp. 785-788, 7 figs. 



It has long been suspected that some flies pass their larval stages 

 parasitically in certain terrestrial Isoj)ods. In 1840 the larva of 

 Stevenia umbratica, Fall., was recorded as parasitising Oniscus asellus,Jj., 

 another species, S. atranientaria, Meig., being reported from the same 

 host. In 1903, some Dipterous pupae were found in the empty skin 

 of an American Isopod ; and in 1908, from two pupae found in the 

 Isle of Wight in specimens of Oniscus asellus, the adults of Phyto 

 inelanocephala, Meig., were reared. 



In this note the author deals with four species of woodlice, Porcellio 

 scaber, Latr., Oniscus asellus, L., Armadillidium vulgare, Latr., and 

 Philoscia muscorum. Scop., from the neighbourhood of Portsmouth, 

 in the last two of which no parasites were found, while the others 

 yielded larvae of Phyto melanocephala. 



The parasite penetrates the body of its host probably towards 

 autumn, and hibernates in the first or second stage according to the 

 size of the host, the third larval stage being entered upon at the 

 beginning of summer, except in the case of those that have hibernated 

 in the first stage, the development of which is slower. After feeding 

 on its host, the parasite pupates in its skin, in which stage it is itself 

 often attacked by an Ichneumonid, and the adult fly emerges a 

 fortnight later. Parasitism by this form results in the atrophy of the 

 genital organs of the host. 



The author deals at length with the anatomy of the three larval 

 stages and shows that the first of these closely resembles Sarcophaga 

 and Onesia, from which, however, it differs in many important 

 particulars. It also shows a striking resemblance to the larva of 

 Digonichaeta setipennis, but differs from all other Muscid parasites of 

 Arthropods so markedly as to constitute a type at present unique. 



Malenotti (E.). I Nemici natural! della " Bianca-Rossa " {Chrysom- 

 phalus dictyospermi, Morg.). [The natural Enemies of G. dicty- 

 ospermi.] — Separate, dated 29th October 1917, from Redia, 

 Florence, xiii, no. 1, pp. 17-53, 2 plates. 



The natural enemies of Chrysomphalus dictyopermi, Morg., hitherto 

 recorded are a fungus, a predaceous Trombidiid mite, six predaceous 



