BRENTHIS. 65 



the two, resembling Argynnis in the general character of its 

 markings, and especially in the silvery or purplish markings of 

 the under surface, and Mditcza in its small size, and in its habits. 

 The generic characters most resemble those of Argynnis, but the 

 palpi are only slightly thickened, and on the fore-wings only 

 one sub-costal nervule is thrown off before the end of the cell, 

 while the median spur is wanting. In these characters it ap- 

 proaches Melitcza, but in Brenthis the tibiae are encircled with 

 spines. More important differences, however, are shown by the 

 larvae, which are furnished with branching spines in Brenthis^ 

 as is the case in typical Argynnis. The larvae of Brenthis^ like 

 those of Argynnis ; feed chiefly on violets. 



Brenthis is a more widely-distributed genus than Argynnis. 

 It is represented by numerous species throughout the Palaearctic 

 Region, and among these several are Arctic and Circumpolar, 

 and have been found almost as far north as our explorers have 

 yet penetrated, while others are truly Alpine species. It is, 

 however, poorly represented in North America, only two 

 species, A. bellona (Fabr.), and A. myrina (Cram.), being 

 generally common in the United States ; but there is a little 

 cluster of somewhat aberrant species found in Chili. 



PEARL-BORDERED FRITILLARY. BRENTHIS EUPHROSYNE. 



(Plate XII., Figs. 3, 4.) 

 Papilio euphrosyne. Linn., Syst. Nat. (x.), i., p. 481, no. 142 



(1758); id. Faun. Suec. (ed. ii.), p. 282, no. 1069(1761); 



Esper, Schmett, i. (i), p. 242, pi. 18, fig. 3 ; i. (2), pi. 114, 



pi. 72, fig. 3 (1777). 

 Melitaa euphrasy ne^ Steph., 111. Brit. Ent. Haust., i., p. 135, pi. 



iv., fig. 4 (1827, var.). 

 Argynnis euphrosyne, Kirby, Eur. Butterflies and Moths, p. 18 



(1878); Lang, Butterflies, Eur., p. 198, pi. 46, figs. 5, 



(1883); Buckler, Larvae of Brit. Butterflies and Moths, i., 



p. 77, pi. n, fig. 2 (1886); Barrett, Lepid. Brit. Isl., i., 



p. 174, pi. 25, figs. 2, 2af (1892). 



