LEPIDOPTERA NYMPHALIDAE ARGYNNIS NITOCRIS. 751 



soon becomes very abundant throughout the whole region. The specimens 

 are quite similar to those of the Southern States, though perhaps a shade 

 paler below. During July, the eggs are laid upon a species of Scdum; in 

 some localities, on almost every little clump of the plant one or several eggs 

 of Claudia, with occasionally one of P. Smintheus, may be found. 



The eggs soon hatch, but the season is so short that in" all probability 

 the larvae hibernate when half grown. The mature larva is dark reddish- 

 brown, with steel-blue spines ; the skin is highly polished, seeming to have 

 a glaze like that of some, stone ware. The chrysalis somewhat resembles 

 that of Melitcea; it is pale-gray, with some yellow dots. 



ARGYNNIS, Fabr. 

 t ARGYNNIS NOKOMIS, Edw. 

 PLATE XXXV, FIGS. 1, 2, 3. 4. 



Argynnis Nokomis, EDW., Butterflies N. A., i. 



Specimens of this magnificent insect were brought by the expedition 

 from Arizona in 1871. Until that time but a single male was known 

 from the Bitter Root Mountains of Montana. 



tARGYNNIS NITOCRIS, Edw. 

 Arginnis Nitocris, EDW., Trans. Am. Eut. Soc., v. 



Male. Expands three inches. Upper side bright fulvous, much obscured 

 by brown from base to middle of disk, except upon a portion of cell of 

 primaries ; both wings edged by two parallel, fine, black lines, which, on 

 secondaries, inclose a rather broad fulvous space, on primaries a narrower 

 space, divided by the black nervules ; anterior to these lines on primaries a 

 series of black lanceolate spots, the three or four next apex connected and 

 resting upon the inner line, the others separated and not touching the line. 

 On secondaries, a series of lunular separated spots ; the rounded, exti adis- 

 cal spots, as in NoJcomis ; small on secondaries, rather large on primaries. 

 The markings on disk and to base as in Nokomis, heavy on primaries, light 

 on secondaries ; the discal band on the latter broken into small, separate 

 lunules. The spot on the arc like the letter S. Fringe of secondaries light- 

 fulvous ; of primaries deep-fulvous. Black at tips of nervules. 



