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X 



106 



of Culex pipiens, and as these tanks frequently overflowed into a 

 neighbouring brook, the mosquitos became distributed in this manner. 

 A method of eliminating this is being worked out. 



Senior- White (R. A.). New Ceylon Diptera. — Spolia Zevlanica, 

 Colombo, xi, no. 43-44, 7th March 1921, pp. 381-395, 2 plates. 



The Tabanid, Haematopota rhizophorae, sp. n., is described from 

 Ceylon. 



Friedrichs (K.). Zur Kriebelmiickenfrage. [The Simidium Problem.] 

 — Deutsche Tierdrztl. Wochenschr., Hanover, xxix, no. 17, 23rd 

 April 1921, pp. 212-213. 



This is a supplement to the author's recent paper under the same 

 title [R.A.E., B, ix, 104], and discusses some criticisms recently 

 made by Wilhelmi. The author rather doubts the desirability 

 of the many genera proposed by Enderlein [loc. cit.]. 



Kieffer (J. J.). Chironomides d'Afrique et d'Asie conserves au 

 Museum National Hongrois de Budapest. [African and Asiatic 

 Chironomid in the Collections of the Hungarian National 

 Museum at Budapest.] — Ann. Mus. Nat. Hist. Hung., Buda- 

 pest, xvi, pt. 1, 30th August 1918, pp. 31-136, 48 figs. 

 [Received 11th April 1921.] 



Tables are given for the determination of the described species, 

 nearly all of which are new. The new species include two Asiatic 

 species of the genus Cnlicoides, C. albonotatus and C. nadayanus, 

 and ten African ones, C. griseidorsum, C. impressus, C. circumscriptus, 

 C. silvestrii, C. lugens, C. albosparsus, C. conjunctus, C. xanthogaster , 

 C. remotus, and C. guineensis. 



Laveran (A.) & Franchini (G.). Contribution a I'Etude des Inseetes 

 propagateurs de la Flagellose des Euphorbes. [A Contribution to 

 the Study of the Insects that transmit the Flagellates of 

 Euphorbia.] — Bull. Soc. Path. Exot., Paris, xiv, no. 3, 9th March 

 1921, pp. 148-151. 



In view of the frequent occurrence of flagellates of the genus 

 Herpetomonas in insects, it seems logical to suppose that those species 

 that suck the latex of Euphorbia should play an important role in 

 the occurrence of flagellates in that plant. This question has been 

 studied since 1910, and the knowledge regarding the relations between 

 certain insects and the disease in Euphorbia is briefly reviewed. In 

 1920 it was established that a bug, Stenocephalus agilis, is not only 

 a transmitter of the disease from one plant to another in Portugal, 

 but is also the primary animal host of the flagellate of Euphorbia 

 [R.A.E., B, viii, 216]. It would be interesting to know if 5. agilis 

 is found on infected Euphorbia in Italy ; it has not as yet been traced 

 among many insects taken on the plant. Among insects collected 

 on Euphorbia at Bologna, those capable of sucking the latex include the 

 Lygaeids, Ajysw.s sp. and Lygaeus sp.,the Pentatomid, Calocoris chen- 

 podii and the Ca.psid, Megaloccraea ruficornis. Nysius sp. has previous^ 

 been found on Euphorbia infected with flagellosis in Mauritius and 

 in the Indies, and seems to have been rightly regarded as a trans- 

 mitting agent of the disease. It is possible that this insect may be, 



