rAPiMoN'iD.K. — Plains. 27 



Sp. 1. Crala'gi. A lis fere amcvloribm albis, renin nif>ri.s. (Kxp. alar, 'i unc. 

 t— lOliii.) 



Pa. Crativgi. Linm: — Lewiii. jd '^il.f. 1 — !•.— Pi. C'ratx'gi. Sfe/jlt. Catal. 



An elegant insect : both surfaces of the wings are white, with black ncrvures, 

 and nearly correspond; above, the anterior wings are margined on their outer 

 edge with irregular triangular transparent dusky spots, the nervures being 

 black, with the transverse one at the tip of the basal areolet very broad : the 

 posterior wings are similarly bordered on their outer edges, but the nervures 

 are less expanded on the disc : beneath, the anterior wings resemble the upper 

 surfaces, but the nervures are more dilated ; the posterior wings, on the con- 

 trary, have the nervures much stronger than on the upper surface, and are 

 very thickly irrorated with dusky : both sexes have the wings very transpa- 

 rent, the female especially; and this sex has the nervures generally brownish. 



Var. fc\ Without the black spots on the hinder margin of the anterior wings. 



The caterpillar lives in society, beneath a silken web, during the earlier periods 

 of its existence : it is at first black ; it afterwards becomes furnished with 

 very short yellow and white hairs, and three black, longitudinal lines, one 

 dorsal, the other lateral : it feeds on the whitethorn. The chrysahs is yellow 

 or white, with small stripes and spots of black : the perfect insect appears in 

 about three weeks. 



This elegant insect is somewhat periodical in its appearance, at 

 least near London, In June, 1810, I saw it in plenty at Coombe- 

 wood, and in the following year 1 captured several at Muswell- 

 hill, since which time I have not seen any at large. Mr. Haworth 

 informs me that it used to occur constantly at Chelsea, but he has 

 not seen any of late. In the New Forest, near Brockenhurst, and 

 near Herne-bay, in Kent, it abounds, and I believe regularly : it 

 is also found near Enborne, Berks, and Glanville's-Wootton, Dor- 

 set, as I am informed by Mr. Dale. 



Family II.— NYMPHALID/E, Swainson. 



Antenna- with a distinct club, sometimes nuich compressed and abruptly pro- 

 «luced, or formed gradually and scarcely compressed ; not hooked at the tip : 

 unter'wr le^s in both sexes more or less imperfect, intermediate and posterior 

 perfect, furnished with moderate bifid claws, or simple with an unguiform 

 appendage: hinder tibics with one pair of spurs only, or simple: jiosferior 

 winfrs with a groove to receive the abdomen. Larva cylindric, spinose, or 



are also similar on both surfaces : their inner edge is dusky, and there is an 

 indistinct small dusky spot on the costa, and a black one towards the centre of 

 the disc : the body is black, covered with cinereous down, and the antenme 

 are totally black. 

 Caterpillar and chrysalis unknown ; the perfect insect is a native of the alpine 

 countries of Europe, and has been incorrectly marked as an indigenous species 

 by Dr. Turton. 



