I30 



shining; across each vertex from back to front a narrow whitish bar; 

 surface much covered with fine tubercles, from which come long black 

 hairs. From 4th moult to pupation about six days. 



Chrysalis. — Length .38 to .44 inch; breadth across mesonotum 

 .14 to .15 inch; across abdomen .16 to .17 inch; cylindrical, the abdo- 

 men stout; head-case short, beveled roundly on both sides to a trans- 

 verse edge, this either very little convex or square; the sides incurved; 

 mesonotum not prominent, rounded, not carinated, with a low tubercle 

 on either side, followed by a slight depression; the posterior ends of 

 segments 8 to 1 1 on dorsum raised above surface, that of 8 decidedly, 

 making rather a prominent ridge; color variable, yellow-brown to 

 blackish brown; the wings and head-case one shade, not mottled; the 

 rest specked and mottled with lighter brown, or yellowish, especially 

 on middle segments; the dorsal and upper lateral larval tubercles repre- 

 sented by slight elevations, about which the yellowish dots are more 

 dense than elsewhere. Duration of this stage five to seven days, in 

 October. 



Camilhisvja.s described, Tr. A. E. Soc. 3, 268, 1871, from examples 

 taken by Mr. Mead in northern Colorado, 1870. It is a smaller species 

 than Tharos, and closely allied to it, more variegated on upper side, 

 and on that side much like Pratensis, Behr. It is dimorphic after the 

 same pattern of markings as That'os, Phaon and Vesta; probably also 

 Pratensis, for I think Orseis must be a co-form with that species. 

 Whether the dimorphism of Camillus is strictly seasonal, however, 

 cannot yet be determined. Further experiments are necessary to get 

 at the facts; but what I suppose, partly from analogy with Tharos and 

 partly from the outcome of the larvae raised this year, to be the sum- 

 mer form, is the typical Camillus as described in Trans. It is light 

 ochre-yellow on under side, with a pale chestnut-brown patch at outer 

 angle of hind wing, a smaller one on middle of disk, and a cloud ot 

 same hue on hind margin. In the female these markings are distinct, 

 but in the male they are pale and more or less obsolete. In both sexes 

 the disk is inscribed by reddish lines, as in Tharos. The other form 

 is much covered with brown, and across the disk is a conspicuous belt 

 of whitish color, after the manner of form Marcia, of Tharos. It was 

 this form which was described by me as Emissa, in Trans, quoted, p. 

 269. In the Catalogue, then, the species should be set down thus: 



Camillus. 



1. dimorphic form Camillus. 



2. " " Emissa. 



What I take to be a bleached example ol Emissa was described by 

 me as Pallida, Pr. E. Soc. Phil., 2, 505, 1864, the same which Strecker 

 (Lep. pi. 8) has figured as Mata, Reak. Mr. Mead, in Rep. Wheeler 

 Exp. V, 764, 1875, says of Camillus: "This is the most abundant 



