524 Mr. G. T. Baker 07i the distribution of 



rosy, the hinder thurd of the former being dotted with very pale 

 lemon. The hind wings are greenish, very finely and densely 

 irrorated all over with grey, and spotted more or less markedly on 

 the posterior margin with whitish, with a small central whitish 

 spot, between which and the anal angle are two more whitish dots 

 close together. My smallest specimen measures 28 mm. in 

 expanse, and the largest 37 mm. 



I have two 2 ? which differ in no way whatever from 

 the (? , and I learn that the two sexes are precisely 

 similar. 



This species was first described and figured by Donzel 

 in the 'Annales Soc. de France,' 1842, pp. 197, 198, 

 pi. 8, fig. 1 ; also, under the name Levaillantii, by Lucas 

 in the same work, 1847, pp. xlix and 1 ; and in 1850, 

 p. 92, pi. 2. This same author again described it in 

 detail and figured it in the ' Exploration de I'Algerie,' 

 pp. 348, 349, pi. 2, fig. 1. The characteristics on which 

 he relies for the separation of his Levaillantii from 

 Donzel's Charlonia will not, however, hold good, viz., 

 the pink costa, the larger apical patch, and the discoidal 

 spot being surmounted by another small spot between 

 it and the costa. These points are extremely variable, 

 and in a large series it would be quite impossible to 

 separate them, so that they are certainly insufiicient to 

 permit of even a varietal name. Mons. Oberthiir 

 assures me that Donzel's and Lucas's insects are one 

 and the same species. Levaillantii must therefore sink 

 as a synonym of Charlonia, Donz. It is by no means 

 uncommon in Algeria, has occurred in Tunis, and quite 

 recently two perfectly typical specimens have been sent 

 to the National Collection from Fortaventura in the 

 Canaries. 



Var. Mcsopotamica, Stgr. 

 The difference between the upper side of this and Charlonia is 

 slight ; the discoidal spot is less angled, whilst the apical patch is 

 more extended along the posterior margin towards the anal angle. 

 The fore wings are, however, decidedly rounder in shape, this 

 being caused by the costa being somewhat deiiexed posteriorly just 

 in front of the apex. On the under surface the difference is more 

 marked ; the fore wings are yellower, and the discoidal spot 

 absent, this spot on the upper surface only showing through very 

 indistinctly ; the apical patch is pale greenish yellow, densely 

 irrorated with grey. The hind wings are pale yellowish green, 



