108 Analytical Notices of Books. 



immediate relation to Myrina will be readily conceived from the agree- 

 ment of their principal characters, the distinctions between them being 

 chiefly derived from differences in the proportional length of parts. In 

 external habit it resembles Colias, a group referred to the Chilognathiform 

 stirps ; the colour is spread over the surface in the same manner, and 

 varies but little in the sexes ; the margins are similar, and the metallic 

 irrorations existing in Myrina are no longer observable ; the markings 

 underneath likewise are simple. The form of the hinder wings and the 

 direction of the tail indicate also an affinity to Gonepteryx ; but this re- 

 semblance, being founded entirely on an artificial character, is not in- 

 sisted on. The insects in the East India Company's collection referred 

 to this genus are the Loxura Atymnus, fPapilio P. R. Atymnus, Fab.,) 

 and a new species, Loxura Pita. 



Another new genus, Phjedra, is proposed by Dr. Horsheld as a kind 

 of appendix to the Vermiform stirps, in which its true position is not at 

 present satisfactorily ascertained. Its metamorphosis is yet unknown ; 

 and the perfect insects referred to it possess a complication of characters, 

 partaking of several genera, besides certain peculiarities of their own. 

 In the structure of their antenncB they agree, upon the whole, with Lox- 

 ura ; and the palpi, although shorter than in that genus, are constructed 

 on the same plan : in the anterior feet of the male they resemble the in- 

 dividuals of Thecla, strictly so called ; but they differ from all the spe- 

 cies of that genus and of Lycsena in the pulverulent covering of the under 

 side of their wings, in their markings, and in the abrupt termination of 

 the hinder pair. The first species enumerated, the Phcedra Terricola, 

 Horsf., flJesperia R. Phcedrus, $ , and Hesp. R. Msopus, 5 , Fab.,) 

 was arranged by MM. Latreille and Godart in their fourth great subdivi- 

 sion of the genus Polyommatus, comprising those with entire or slightly 

 dentate wings ; but although several of the insects of that section resem- 

 ble it in the colour of the upper surface, they have nothing of the pecu- 

 liarity which distinguishes the under side, and are all essentially different 

 in a generic point of view. A second species is the Phcedra insularis, 

 Horsf., which differs from the preceding, not merely in marking, but 

 also in the form of its hinder wings, indicating a sectional division in this 

 small group. In Ph. Terricola these organs are broad and obtuse, with 

 an abrupt regularly transverse posterior margin, gradually rounded to- 



