106 Analytical Notices of Books. 



Lysimon, Pheretes, and Damon. Of Polyommatus, strictly so called, 

 with the " margins of the hinder wings at the anal extremity angular, 

 " and produced to a short point," two new species are described, the 

 Pol. .^kasa and Pol. Puspa, which may be respectively regarded as the 

 Eastern analogues of the European Pol. Argiolus and Pol. Avion. The 

 latter forms a natural transition, by its markings and habit, to the follow- 

 ing genus. 



LyccEna is distinguished from Polyommatus primarily by its larva, 

 which in the latter genus is regularly rounded or cylindrico-gibbous, and 

 In the former is more oblong and impressed at the sides. The only other 

 mark of distinction between the genera is the form and habit of the 

 Avings of the perfect insect. Of Lycmna seventeen species exist in the 

 collection, five of which are described as new. They are distributed into 

 four sections founded, for convenience of reference, on artificial cha- 

 racters. 



Of Thecla two prominent types of form have been determined, chiefly 

 by the minute examination of the tarsi in both sexes, which Dr. Hors- 

 field has pursued more closely and extensively than any other observer. 

 The character obtained from the structure of the feet has been confirmed 

 by that of the antenna ; and Thecla, strictly so called, is therefore 

 characlerized in the following terms: " AntenncBcai^iivXo cylindrico-ovali, 

 " utrinque manifeste attenuato ; tarsi pedum anticorum maris articulo 

 " solitario, cylindrico, ungue incurvo baud exserto." In the insects of 

 this group, the hinder wings are furnished with an anal appendage, and 

 a single tail. The larva of the only Indian species in which the meta- 

 morphosis was observed, is linear-oblong, depresso-scutate, and fur- 

 nished with tufts of short bristles arranged in transverse rows at the seg- 

 ments. Of the nine species of this subgenus contained in the collection, 

 five are now described for the first time. The subgenus Amblypodia is 

 distinguished by its " Antenna e basi usque ad apicem sensim incrassatae, 

 " capitulo baud distincto ; tarsi pedum anticorum in mare articulo solir 

 " tario inermi obtusissimo, superficie verticali abriipte terminato." Its 

 larva corresponds in form with that of Thecla, but is covered entirely 

 with short, delicate, solitary hairs ; in one species, Amblypodia Longi- 

 nns, Horsf., Hesperia R. Longinus, Fab., it is aberrant in form, being 

 distended anteriorly, excavated at the sides, contracted behind, and 



