562 EXPERIMENT STATION EECORD. 



1-year old wood while in R. vulgare and R. grossularia the current season's 

 growth seems to have them in greater numbers. 



The economic relations of these insects may prove of some importance since 

 the currant miner has been shown to afford entrance for a fungus which is thus 

 enabled to kill gooseberry shoots. " Direct injury to currants and gooseberries 

 is probably not very serious and of course the direct injury to plums, cherries, 

 etc., by other cambium miners is no doubt even less, because the mines are so 

 small when compared to the size of the plants." 



Technical descriptions are given of the larva, cocoon, and moth together 

 with an account of the histological modification resulting from the mining. 

 Brief mention is also made of observations of cambium miners of Prunus and 

 Crataegus. 



The life history of Roubaudia rufescens, a tachinid parasite of African 

 social wasps of the g'enera Icaria and Belonogaster, E. Roubaud {Compf. 

 Rend. Acad. Sci. [Paris], 151 {1910), No. 21, pp. 956-95S) .—An account of the 

 life history and habits of a viviparous tachinid. 



The larvae are deposited in the cells of the wasps' nests and at once attack 

 the eggs or young wasp larvae. It is said that this tachinid fly is often responsi- 

 ble for the total disappearance of these wasps. A small chalcidid hyperparasite, 

 apparently undescribed, often attacks the fly, as many as a hundred developing 

 in a single puparium. 



The bee-flies (Bombyliidse) in their relations to flowers, S. Graenicher 

 {Bui. Wis. Nat. Hist. 8oc. [n. scr.]. S {1910), No. 2, pp. 91-101).— This account 

 is based on a comparison of observations made by the author in Milwaukee 

 County, Wis., with the very extensive observations of Robertson in Carlinville, 

 Macoupin County, in southern Illinois. 



Azolla V. mosquitoes, J. B. Smith {Ent. News, 21 {1910), No. 10, pp. .'iSl-JiJfl, 

 pi. 1). — Having conducted an investigation in Europe, the author concludes that 

 the aquatic plant {Azolla sp.) experimented with in Germany is useless in 

 dealing with the local city and the salt-marsh mosquito problem. 



On the absence of a vesicant in the ether extract obtainable from mos- 

 quitoes, J. O. W. Barratt {Ann. Trop. Med. and Par., 4 {1910), No. 2, pp. 177, 

 17S). — The author concludes that the irritant action of mosquito bites can not 

 be attributed to the existence in these insects of any substance possessing a 

 vesicant action. 



The prevention of malaria, R. Ross {London, 1910, pp. XVII+669, pis. 31, 

 figs. 11). — The first part of this work consists of chapters on the history of 

 malaria, a summary of facts regarding it, fundamental observations and ex- 

 periments, the parasitic invasion in man, malaria in the community, and pre- 

 vention. The concluding chapter, which composes nearly half the work, con- 

 sists of special reports upon campaigns against malarial mosquitoes that have 

 been conducted in various countries. The authors of these reports and the 

 sections represented are as follows : United States, by L. O. Howard ; Panama, 

 by W. C. Gorgas and J. A. Le Prince ; West Indies, by R. Boyce ; Jamaica, by 

 W. T. Prout; Amazon region, by H. W. Thomas; South Brazil, by O. Cruz; 

 Spain, by I. MacDouald; Italy, by A. Celli; Greece, by C. Savas; German pos- 

 sessions, by C. Schilling ; French possessions, by E. Sergent : Egypt, by H. C. 

 Ross ; Khartum, by A. Balfour ; South Africa, by L. Bostock ; Durban, by P. 

 Murison ; Malay States, by M. Watson ; Formosa, by T. Takaki ; prevention of 

 malaria in troops in war, by C. H. Melville; and prevention of malaria among 

 troops in peace, by C. E. P. Fowler. 



The appendix includes articles on Suggested Terminology to the Phenomena 

 of Cytogenesis, Notes on the Malaria-bearing Anopheliues, Examples of Legis- 

 lation, and Notes. 



