328 THE CANADIAN ENTOMOLOGIST, 



States of Colorado, Montana, and Washington, no less than twenty years 

 to accumulate. The account is concluded vvith a description of the 

 formation of the extraordinary pouch or keel which is to be seen beneath 

 the abdomen of the females of various species of Parnassius. That this 

 should be formed by the male is one of those strange marvels that render 

 the careful study of the lives of our Butterflies so interesting and 

 attractive. 



The second plate depicts both sexes of Satyriis Charon and the 

 male of its variety Silvestris ; also the egg, the various stages of the 

 larva, the chrysalis, and many details. The imago and the several pre- 

 paratory stages are described, and a short but interesting account is 

 given of the habits of the butterfly and the rearing of the larva-. 



On the remaining plate are figured the egg, three stages of the larva 

 with details, and both sexes of the imago of the British Columbia species 

 Chionobas Gigas, Butler. After describing the preparatory stages so far 

 as known, the author relates the differences in appearance and habitat \ 

 between this species and Califoniica and Iduna, which are frequently- 

 confused in collections. Gigas is shown to be confined, so far as is yet 

 known, to Vancouver Island, where the male frequents the tops of the] 

 highest mountains, the female being usually found much lower down.j 

 Ichina inhabits the slopes of the evergreen redwood forest in North- 

 eastern California on the Pacific Coast ; and Califoniica^ the hot, arid 

 regions of East Oregon, Washington, and the semi-desert portion of 

 North-east California. " Gigas is semi-arctic, living amid the cold, dark 

 fir forest ; Iduna is temperate, living in the mild, dark redvi^ood forest ; 

 Californica is semi-tropical, living in oi)en^ dry, warm glades in the 

 ' bush-land, ' on the border between the forest and the open plains. 

 Gigas alights on bare rocks ; Iduna on green twigs ; Californica on 

 dead or dry grass." But we must refer the reader to the book itself for 

 all the interesting particulars regarding these strange Butterflies. 



The wonder to us is that so few Entomologists subscribe to this 

 magnificent work. The Parts are issued at such long intervals that the 

 cost is very light ; those who have secured them know what a treasure 

 they possess and how highly they prize it. 



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Mailed November 41 h, 1S95. 



