LEPIDOPTERA. 135 



Wings above in the male, white, with a broad common sulphureous-yellow basal fascia irregularly 

 laciniated along the edge which looks towards the disk, the extreme borders being very deli- 

 cately edged with black at the tip ; in the female, the entire surface or in some cases the basal 

 portion alone bright yellow ; the fore-wings (in this sex) having the exterior and posterior 

 borders, a discoidal spot and an obsolete series of wedge-shaped marks passing obliquely 

 from the apex towards the disk black, while the hinder wings are confined by a continued 

 or interrupted border of the same colour : underneath in both sexes yellow, or covered with 

 a pale stramineous yellow shining tint ; fore-wings with a single pale yellowish or ochra- 

 ceous discoidal spot ; hinder pair with a sesquialterous spot, larger in size and of a bright 

 silvery tint ; these spots being individually surrounded by a single or double ring, or entirely 

 bedded in a broad spot of a lilach or ferruginous tint. 

 Papilio Hilaria. Cram. pi. 339. fig. A. B. (The male.) 



Colias Hilaria. MM. Latr. et Godt. Enc. Meth. Hist. Nat. ix. 97. (The male.) 

 Papilio Catilla. Cram. pi. 229. fig. D. E. (Variety of the female.) 

 Papilio D. C. Catilla. Fab. Ent. Syst. tom. 3. pars. 1. p. 209. No. 656. (The female.) 

 Colias Catilla. MM. Latr. et Godt. Enc. Meth. Hist. Nat. ix. 95. 

 Mas supra cum specie antecedente omnino convenit : foemina tinctura gaudet latiore paginam 

 totam operiente vel quandoque variat limbo postico saturatiore vel etiam flavedine ultra 

 medium evanescente. Subtus alse maris ex albicante flavescunt vel nitore stramineo-argentino 

 sunt lavatee; fceminse vero Isetissime flavae pulverulentae, versus marginem posteriorem serie 

 macularum cuneatarum fuscarum signantur, maculis violaceis insuper sparsis ; notse discoi- 

 dales in utroque sexu numero ac dispositione asquales in mare circulo tenuiore lilacino cinguntur, 

 in foemina ambitu duplici tenui vel diifuso indeterminate complex^, in posticis interdum in 

 plaga maxima profunde sinuata e disco ad costam oblique extensa ferruginea nidulant. Haec 

 varietas a Cramero, loco supra citato delineata, in musaeo nostro hospitatur egregie asservata. 

 Saccus glandularis maris penicillo sericeo opertus sicut in congeneribus adest. Pectus virescens : 

 abdomen flavidum, pilis longis laxis sericeis canescentibus vestitum : antenruB e saturato violaceo 

 in fuscescentem variantes. 



The proposed union of two species, the Colias Hilaria and C. Catilla of Cramer, which are kept distinct 

 by the authors of the Encyclopedie, is founded on the examination of a very numerous series of specimens. 

 In all these the male exhibits an uniform character, and is clearly distinguished by the glandular sac above 

 described, and its covering, which consists of a beautiful silky brush protruded from the inner edge of the 



anterior wing near the base. 



I have endeavoured to indicate clearly the characters by which the preceding species are distinguished; 

 in the upper surface they all greatly resemble each other, and, as in all species of this genus, we must be 

 directed in the discrimination of them by the markings of the under-side. This species is extremely abun- 

 dant : we have at least forty specimens exhibiting all its varieties. The under-side of the female in 

 many cases, assumes a light, stramineous, shining tint, resembling that of the male. 

 59. Colias Scylla, MM. Latr. et Godt. Enc. Meth. Hist. Nat. ix. 95. 



Plate IV, fig. 6, Larva; fig. 6, a. Chrysalis. 

 Papilio D. C. Scylla. Linn. Syst. Nat. 2. p. 763. No. 95. Fab. Spec. Ins. tom. 2. p. 47. 

 No. 203. (The female). Papilio D. C. Cornelia. Fab. Mant. Ins. tom. 2. p. 2L No. 229. 

 (The male.) ^^^.^.^ 



