60 THE CANADIAN ENTOMOLOGIST. 



and habitat of their captures, a judicious selection of the same would, I 

 think, add much to the popularity, and not a little to the utility of the journal. 



The question of the localities I consider as of very great importance, 

 especially when united with the season at which certain insects may be 

 expected to appear. Entomologists visiting remote sections of the country 

 would, if such observations were duly registered, be directed whither to 

 go in order to obtain specimens of species which might be rare or wanting 

 entirely in their own neighborhoods. For instance, I have never captured 

 any of the Lyctenidse, nor ever known one to be captured in the 

 immediate vicinity of Belleville, though in Madoc, about 30 miles north, 

 I saw them in great profusion in the middle of May, 1868. Again, P. 

 asterias is very common in this town, while only a kw stragglers of P. 

 turnus are ever seen. In the township of Lake, about 25 miles north- 

 west from Madoc, and a very wild district, P. ttinius is abundant, while 

 I did not observe a single specimen of asterias in three weeks of the 

 heighth of the season. 



I think it would also be desirable to give from time to time notices 

 of works on the science, especially such as refer to the discrimination of 

 insects, and to give a list of such books as are likely to be of service to 

 young collectors. You will see that I am an advocate of the propagatida. 

 Every collector is certain to meet with rare, and is not unlikely to capture 

 hitherto undescribed species, and if " in the multitude of counsellors 

 there is wisdom," so in the multitude of collections there is knowledge. 



James H. Bell, Belleville, Ont. 



I found in opening some cecropia cocoons lately, two pups in one 

 cocoon. These were of different sex, and in opposite position as regarded 

 the loose end of cocoon ; neither was perfectly formed, apparently owing 

 to their being crowded out of shape in the limited space. The cocoon 

 was one of the " loose " kind ; both inner and outer cocoons and floss 

 were uniform in texture, showing no line by which the work of two larvse 

 could be distinguished. There was, however, a rudimentary division on the 

 inside of the inner cocoon at its close end, partly enclosing the abdominal 

 end of the ^ pupa. In writing of Ophion macrurum, p. 220, v. 8, I omitted 

 the word "imago." Ophion pupae would hardly be a rarity, since over 20 

 per cent, of polyphemus are thus affected, but Ophion imago in October 

 and November are new to me. The cocoons were kept in a cold room. 



C. E. WoRTHiNGTON, Chicago. 



