138 The Ottawa Naturalist. [Jan. 



remained small. The most interesting effect of this parasite is 

 that it stops all growth of the external adult organs (legs, wings, 

 etc.) in the larva. In a normal larva these organs are well 

 developed at the time of maturity and are readily seen through 

 the transparent skin of the thoracic region. The parasitised 

 larva grows to an abnormal size, as if at the expense of these 

 organs. The protozoan parasites, with the exception of one, 

 belong to the genus Glugea and are closely related to the Pebrine 

 disease of silkworms. Several species were present in different 

 larvae. All of them form large masses of parasitic material in 

 the body cavity, which, at maturity, are resolved into innumer- 

 able minute spores, which spread the disease in the water upon 

 the death of the host. The other protozoan proved to be a 

 Gregarine that formed a vast number of small cysts in the bodv 

 cavity, from which, later, motile "spores" escaped. 



Mr. Beaulieu, who is working on a monograph of Canadian 

 Elateridse, showed a collection in which there were representa- 

 tives of the 25 genera found in our fauna. He also exhibited a - 

 specimen each of two new species, Limonitis venablesi Wck., 

 and Corymbitis weidtii Ang. The following figures, showing the 

 distribution of the species of this interesting familv, were given: 

 Known species in the world fauna, about 5,500; American 

 species, about 2,260; American species north of Mexico, about 

 500; Canadian species, about 190. Described genera, world 

 fauna, 285; American genera, 129; American genera north of 

 Mexico, 47; Canadian genera, 25. 



Mr. Gibson exhibited his collection of Canadian arctiid moths 

 of the genus Apantesis. These were shown in five large cases. 

 Attention was directed to certain of the species which had been 

 reared from the egg. In some of the series larvae in all stages 

 were present, and with many species adult larvae and pupae. 

 These moths, known popularly as "tiger moths," are very 

 beautiful insects. The larva? are clothed with dense clusters of 

 hairs, usually black or reddish. In spring they may often be 

 found under pieces of board, etc., along railway tracks. Species 

 which occur in the Ottawa district are virgo, virguncula, parthen- 

 ice, arge, celia, figurala, nais and viltata. 



Other interesting exhibits which were brought to the meet- 

 ing were: by Bro German, specimens of Saperda concolor and its 

 work, and a hvmenopterous parasite reared therefrom; also a 

 rare beetle, Carabus nemoralis, taken at Montreal. This is 

 supposed to be a European species, but Mr. Beaulieu stated that 

 Dr. Lapouge, the French authority in the genus Carabus, con- 

 sidered that this was not the true nemoralis; by Mr. Kitto, a 

 collection of Cerambycidae and Elateridae, taken in the Ottawa 

 district, some interesting species were represented; by Mr. 



