Saturniidae 



(2) Samia gloveri Strecker, Plate XII, Fig. 4, $ . (Glover's 

 Silk-moth.) 



This species, which may be distinguished from the preceding 

 by the more obscure, purplish color of the outer band, which 

 in 5. cecropia is bright red, ranges over the region of the Rocky 

 Mountains from Arizona in the south to Alberta and Assiniboia 

 in the north. A small dwarfed form has been taken upon the 

 high mountains of Colorado, to which Neumoegen gave the sub- 

 specific name reducta. 



(3) Samia Columbia Smith, Plate VIII, Fig. 8, $ . (The 

 Columbian Silk-moth.) 



This species, which is well represented in our plate, may be 

 discriminated from its allies by its smaller size, and by the 

 absence of the reddish outer shading of the transverse white line 

 which crosses the wings about their middle. It ranges from 

 Maine to Wisconsin, never, so far as is known at present, rang- 

 ing south of the forty-first parallel of north latitude. While 

 closely allied to 5. gloveri, it is much smaller, and the larva 

 shows marked differences. The caterpillar feeds upon the larch. 

 (4) Samia rubra Behr, Plate VIII, Fig. 2, $ . (The Ceano- 

 thus Silk-moth. ) 



Syn. ceanoihi Behr; euryalns Boisduval; calij 'ornica Grote. 



The species which is easily separated from its congeners by 

 its small size and prevalently redder cast of coloration, is found 

 on the Pacific coast, ranging eastward to Utah and Wyoming, 

 The larva feeds upon Ceanothus thyrsiflorus. 



Genus CALLOSAMIA Packard 



The structure of the moths of this genus is much like that of 

 the preceding genus, but the species composing it may invari- 

 ably be discriminated from others by the fact that the pectinations 

 of the antennae of the females in the anterior pair on each joint 

 are shorter than the posterior pair. The genus contains several 

 species, two of which are common in portions of our territory, 

 and the other is a straggler into our fauna from Mexico. 



(i) Callosamia promethea Drury, Plate I, Fig. 2, larva; 

 Plate XI, Fig. II, , Fig. 12, ?. (The Spice-bush Silk-moth.) 



Every country boy who lives in the Atlantic States is familiar 

 with the cocoons, which in winter and spring he has found 



84 



