FAMILY GOSSAMER-WINGED BUTTERFLIES. 127 



Two other genera of Blues also occur in our district, each with two 

 species : Nomiades, represented by a boreal species, N. couperi, not un- 

 common about the Gulf of St. Lawrence, and a southern form, 

 N. lygdamiis, sometimes found in Ohio and even in Michigan and 

 Wisconsin ; and Rusticus, likewise represented by a boreal species, 

 R. scudderii, taken as far south as Albany, N. Y., and a southern, 

 R. striatus, first described from Texas and little known, but said to 

 have been also taken at Kacine, Wisconsin. 



TRIBE COPPERS. 



30. Genus Ciirysopitanus. 

 CHRYSOPHANUS THOE— THE BRONZE COPPER. 



(Polyommatus thoe, Chrysophanus hyllus.) 



Butterfly. — Upper surface of wings coppery brown (male) or 

 blackish brown (female), the female with all but the outer border 

 of the fore wings orange fulvous and marked with rows of small 

 black spots which are smaller and obscure in the male; both sexes 

 have an orange band next the outer border of the hind wings. 

 Under surface of fore wings fulvous, of hind wings silvery gray, 

 bordered as above; both wings have a double submarginal series 

 and an extramesial tortuous series of blackish spots, besides a 

 number of others, mostly round, nearer the base. Expanse 1^ 

 inches or more. 



Caterpillar. — Onisciform. Head minute, pale. Body bright 

 transparent yellowish green having a velvety appearance, with a 

 dark green dorsal stripe edged with yellow, the whole profusely 

 dotted with minute white mushroom -shaped appendages. Length 

 nearly 1 inch. (From unpublished notes of J. Fletcher.) 



Chrysalis. — Light yellowish brown, the abdomen with six longi- 

 tudinal series of obscure fuscous dots on each side (including 

 those beneath) and a few other dots on the thorax. Length more 

 than i inch. 



This butterfly, now^here abundant, is nevertheless found 

 throughout our district except in the eastern half of New 

 England, and eastward; it frequents moist places and flies 

 with less activity than its sprightly allies. It is double- 

 brooded, Avintering in the egg state, the butterflies aj^pear- 

 ing late in June, laying their eggs early in July and con- 

 tinuing through the month. The second brood flies from 

 the middle of August to the middle of September. The 



