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will be based much of the future progress of entomological 

 science. In this direction Mr. W. H. Edwards has this year 

 contributed some of the most important facts. In the continua- 

 tion of his admirable work on North' American butterflies, the 

 transformations and imaginal variations of Papilio turnus are 

 represented on three plates executed with the rarest fidelity. 

 Eleven drawings of the perfect insect appear, nine of the cater- 

 pillar in all its stages, and one each of the egg and chrysalis. 

 Without enlarging on the beauty of these plates, we can safely 

 say that in no country have butterflies been so generously illus- 

 trated. Mr. Edwards finds three broods of this butterfly in 

 West Virginia, and, as in Papilio ajax, the spring brood is not 

 made up solely from the produce of the last brood of the pre- 

 ceding year, but also, in part, from wintered chrysalids of both 

 the earlier broods. The distribution of the butterfly, its habits, 

 as well as those of the caterpillar, the food and the natural 

 enemies of the latter, and the peculiar partial dimorphism of the 

 butterfly, are fully discussed; the latter will be referred to again. 

 In the " Canadian Entomologist," Mr. Edwards has given us 

 also the life history of Phyclodes tharos, with descriptions of the 

 insect in all its stages. Although one of our commonest butter- 

 flies, whose early stages had been sought with care, we have, 

 until recently, known nothing of its history. The eggs are laid 

 in masses, on Asters ; the caterpillars feed in clusters, and are 

 at no period protected by a web ; the winter is passed in the 

 larval stage, and there are, annually, several broods of the but- 

 terfly ; in the Catskills two, in West Virginia four. In the 

 Catskills, the autumn brood is the form described as P. tharos 

 proper, while the spring brood, the form P. marcia, is made up 

 from both the broods of the previous year, a portion of the 

 caterpillars from the former brood passing into premature hiber- 

 nation. In West Virginia there are four broods : the first, from 

 wintered caterpillars, is P. marcia, the second and third P. tha- 

 ros, and the fourth both P. tharos and P. marcia ; a large 

 proportion of the larvfe hibernatmg. The first brood, however, 

 is wholly made up of the remnant of the fourth brood of the 

 previous year, no lethargy or premature hibernation of cater- 

 pillars being noticed in this southern station ; it might therefore 



