441 



Metalnikow (S.) & Gaschen (H.). Sur la Rapidite d'Immunisation 



Chez la Chenille de Galleria.— C.R. Soc. Biol, Pans, Ixxxv, 



no. 24, 2nd July 1921, pp. 224-226. 



Pursuing the investigation of the immunity of Gallena melloneUa 



from various microbes, further experiments were made, such microbes 



as Proteus Bacillus coli and the cholera vibrio, all of which are highly 



virulent to the caterpillar, being used as vaccines. Immunity was 



again easily obtained. It was also found that protection against fatal 



doses could be assured within three hours of the injection of tfie 



vaccine and that weak doses of the latter acted more rapidly ttian 



strong ones. Furthermore, the caterpillars transmit their immunity to 



the resultant moths. 



ZoTT\ (G ) Un Leplomonas du Type L. davidi, La£., chez des 

 Euphorbes de France.— C. 7?. Soc. Biol., Paris, Ixxxv, no. 24, 2nd 

 July 1921, pp. 226-228. 



A flagellate, held by the author to be Leplomonas davidi, Laf., was 

 observed by him in Ettphorbia esula var. mosana and E. helioscopia 

 from Maine-et-Loire, this being the first record of Leptomonads m 

 Euphorbia in France. . 



The various published papers on Leptomonad infection m tupliorbia 

 are mentioned with references. 



B\LL (E D). The smallest known Leaf Hopper.— P^oc. Biol. Soc. 

 Washington, B.C., xxxiv, no. 2, 31st March 1921, pp. 23-24. 



Empoasca minuenda, sp. n., is described from Florida as attacking 

 avocado. E. minuenda var. moznettei, n., and E. minuendavar. clavi- 

 serana n., were found with the above. 



McAtee (W. L.). Membracidae of the Vicinity of Washington, D.C.— 



Proc. Biol. Soc. Washington, B.C., xxxiv, no. 25, 30th June 1921, 

 pp. 123-134. 



In this hst of tree-hoppers collected in the District of Columbia, 

 46 species are recorded. Keys are given to the subfamilies, tribes, 

 genera and species. 



VAN der Merwe (C. p.). a Note on Basychira extorta and its Lepi- 

 dopterous Parasite.— S. African Jl. Sci., Johannesburg, xvii, 

 no. 2, April 1921, pp. 192-193. 



In Durban, the larvae of Basychira extorta feed on the foliage of 

 Ficus natalensis at night, returning in the day to resting places on the 

 tree-trunks, marked bv cast skins and cocoons of Hymenopterous 

 parasites. The pupal^stage varies from 14 to 23 days, the moths 

 emerging mostly in March, though early ones appear in December. 

 In 1919 these caterpillars were found on the trees in May, m June 

 crawling away in search of suitable places to spin their cocoons. 



Small Lepidopterous larvae can be seen clinging to most of the cater- 

 pillars, as many as six having been found on one caterpillar. ^^ hen 

 the latter's cocoon is complete, the parasite may be found either 

 on the caterpillar or between the cocoon layers. The parasites can 

 penetrate the inner cocoon, but often die without causing injury, 



