106 Analytical Notices of Books. 
Lysimon, Pheretes, and Damon. Of Potyommatus, 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. Akasa and Pol. Puspa, which may be respectively regarded as the 
Eastern analogues of the European Pol. 4rgiolus and Pol. Arion. The 
latter forms a natural transition, by its markings and habit, to the follow-. 
ing genus. 
Lycena 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 
wings of the perfect insect. Of Lycena 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 tars in both sexes, which Dr. Hors- 
field has pursued more closely and. extensively than any other ohseryer. 
The character obtained from the structure of the feet has been confirmed 
by that of the antenne; and THxEcta, strictly so called, is therefore 
characierized in the following terms: “ Antenne capitulo cylindrico-ovali, 
** utrinque manifesté attenuato; farsi pedum anticorum maris articulo 
** solitario, cylindrico, ungue incurvo haud exserto.’’ In the insects of 
this group, the hinder wings are furnished with’an anal appendage, and 
a single tail. The Jarva 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 “ Antenne é basi usque ad apicem sensim incrassate, 
** capitulo haud distincto ; tarsi pedum anticorum in mare articulo soli- 
** tario inermi obtusissimo, superficie verticali abrupté terminato.”’ Its 
larva corresponds in form with that of Thecla, but is covered entirely 
with short, delicate, solitary hairs; in one species, Amb/ypodia Longi- 
nus, Horsf., Hesperia R. Longinus, Fab,, it is aberrant in form, being 
distended anteriorly, excavated at the sides, contracted behind, and 
