499 



Iltschew (D.). B"bpxy BMO/lorMaia Ha Daphnis nerii, L. [On the 



Biology of Deiicphila nerii, L.]— CnMcaHMe Ha B-bnrapcKaia 



AKaABMHfl Ha HayKMlt. [//. Bulgarian Acad. 5a.], Sophia, 

 xvii, 1919, pp. 135-174, 3 figs., 2 plates. (With German Summary.) 

 [Received August 1921.] 



The life-cycle of Deilephila {Daphnis) nerii, L., in Bulgaria occupies 

 about 57 days under artificial conditions. The eggs are laid chiefly on 

 flower-buds and young leaves. They hatch in about eight daj-'s, and the 

 larva feeds at first on the tender buds, but later it attacks the actual 

 blossom and the leaves. All food-plants except Nerium oleander 

 were refused under Bulgarian conditions. The larvae feed for about 

 41 days. In no case were they found to enter the soil for pupation ; 

 the cocoon is made on the soil surface from plant debris. The length 

 of the pupal stage varied from 4-5 days in July to 8-13 days in 

 November. Only the summer generation is complete in Bulgaria, 

 as the pupae of the autumn generation are unable to withstand the 

 winter conditions. The reappearance of this Sphingid in the spring 

 is thought to be due to the migration of adults from more southern 

 countries. The eggs that give rise to the migratory generation are 

 probably deposited in December. 



Gaudot (G.). La Lutte contre le Bombyx Cul-bmn. [Remedial 

 Measures against Nygmia phaeorrhoea.] — //. Agric. Prat., Paris, 

 xxxvi, no. 32, 13th August 1921, pp. 136-137, 2 figs. 



A general account of Nygmia phaeorrhoea {Liparis chrysorrhoea) 

 in France is given, and the observations of various authors with 

 reference to its occurrence and control are quoted. 



TuRiNETTi (L.). L'Acclimatation des Insectes auxiliaires. — Rev. Hist. 

 Nat. App., Paris, P^« Partie, ii, no. 7, July 1921, pp. 216-221. 



The propagation and establishment of Cryptolaemus montrouzieri, 

 a Coccinellid predaceous on Pseiidococcus citri and P. adonidum in the 

 South of France, are described. Work on similar lines is being con- 

 ducted by the " Service des Epiphyties " in connection with Rhizobiits 

 lophantae, predaceous on Diaspis pentagona, Habrohracon johanseni, a 

 parasite of Phthorimaea operculella, and Opius concolor, a parasite of 

 Dacns oleae. 



Degrully (L.). Producteurs directs et Phylloxera gallicole. — Progres 

 Agric. & Vitic, Montpellier, Ixxvi, no. 33, 14th August 1921, 

 pp. 151-152. 



As a result of enquiries with reference to the treatment of ungrafted 

 vine stocks attacked by Phylloxera, Balbiani's formula for painting 

 the pruned branches in winter after roughly scraping them is 

 quoted, viz., 10 parts heavy tar oil, 30 parts crude naphthaline, 60 

 parts stone fat lime and 200 parts by weight of water. It is considered 

 sufficient to appl}' the mixture every other ye^x. There are other 

 insecticides that would probably give similar results. 



