THK INTERNATIONAL CONGRESS OF ENTOMOLOGY. 235 



relations of entomology to medical science, his speech being in 

 fact a summing-up of our present knowledge of bacteriological 

 medicine, and the part played by the mosquito and other insects 

 in the dissemination of disease. Hardly less eloquent was 

 Father Wasmann, on the popular subject of "Ants and their 

 Guests," but, to the general disappointment, M. Forel, who was 

 to have spoken on " The Geography and Philogeny of Ants," 

 was unable to be present. In the afternoon three Sections were 

 again formed : one for the discussion of Insect Bionomics, 

 Physiology, and Psychology ; one for Economic and Medical 

 Entomology ; and a third for the further consideration of the vexed 

 problem of Nomenclature. In the second, among others, Pro- 

 fessor F. V. Theobald read a paper on " The Distribution of the 

 Yellow Fever Mosquito, Stegomyia fasciata," and Dr. G. H. Car- 

 penter " Notes on the ffistridae " ; being an account of experi- 

 ments to elucidate the life-history of Hypoderina boris, and the 

 economic value of preventive treatment, with further observa- 

 tions on the warble-tly of the reindeer, CEdemagena tarandi. 

 In the third Section Dr. K. Jordan assisted the discussion "upon 

 Nomenclature. 



Wednesday was a field-day for the evolutionists, and here 

 Dr. F. A. Dixey's address on "Mimicry" drew one of the 

 largest audiences of the Congress. Indeed, it was early apparent 

 that the arrangement whereby six speakers were put down to 

 give their views on this and kindred subjects could by no means 

 be followed out, and after Professor Pi. C. Punnett, of Cambridge 

 University, had delivered his lecture on " Mendelism and Lepi- 

 doptera " — a lucid summary of Mr. Bateson's and his own 

 researches in this highly technical branch of entomology — there 

 was only time for Dr. Jordan to read his paper on " The 

 Systematics of certain Lepidoptera which resemble each other, 

 and their bearing on General Questions of Evolution," the 

 afternoon being devoted to expeditions not strictly entomological 

 — to the Tervueren Museum, replete with exhibits of all sorts 

 exclusively from the Congo ; to the field of Waterloo ; and to 

 the Forest of Soignes. A special Section was announced for 

 Thursday, to supplement the day's unfinished programme. 



Thursday, in consequence, was an exceptionally busy day, 

 for, apart from the General Meeting of the morning, when Dr. 

 Burr delivered Mr. H. St. J. Donisthorpe's address on " Ants 

 and their Guests," and the President of the Entomological 

 Society of France, M. Kunkel d'Herculais, read a paper on 

 " Locust Ravages and their Prevention," members of the Con- 

 gress were invited to inspect the Natural History Museum of 

 Brussels, and to be photographed thereat, as soon as the after- 

 noon Sections had concluded their work. 



So, after the veteran Mr. Merrifield had summed up with 

 admirable lucidity and conciseness the results of his tempera- 



T 2 



