LEPIDOPTERA. 89 



place, that the details are founded on a careful dissection of Theclce Jarbas, Xenophon and Epicles and of Ain- 

 blypodice Apidanus and Ccntaurus ; I have also partially extended my examinations to European species, and 

 as far as I have yet proceeded, I have been confirmed in my opinions. It is my intention to give the result 

 on a future plate : I shall therefore only add, that my dissections have led to a determination regarding the 

 individuals constituting the sexes in Thecla Quercus, the reverse of that of most English Entomologists : in 

 this I have been since confirmed by a reference to several Continental writers, particularly to Messrs. 

 Latreille and Godart, in the Encyclopedic and M. Ochsenheimer. 



* Antenna capitulo cylindrico-ovali, utrinque manifesti attenuate : tarsi pedum anticorum 

 maris articulo solitario, cylindrico, ungue incurvo haud exserto. Larva unius modo 

 speciei hactenus a me observata est, nempe Theclce Xenophontis ; hoc vere depressoscutata, 

 et insuper fasciculis pilorum ad segmenta transversim ordinatis, prcedita est. 

 Alee posticce appendiculo anali cauddque solitarid munitce. 

 Thecla stricte sic dicta. 



21. Thecla Kessuma. Aloe supra fceminas basi discoque alba; cosruleo-argenteo, prcecipue ad basin, 

 irroratce, postica; fusco nebulosa ; singulce limbis fuscis cano fimbriatis, in anticis latioribus in 

 posticis lined nigrd intus albo marginatd cinctis ; anticce insuper stigmate nigro in disco : subtus 

 fusco-canescentes albo strigosm, strigis tribus marginalibus intermedia ex maculis sagittatis 

 interiore ex maculis arcuatis efformatd ; anticce insuper strigis quatuor mediis, duabus interiori- 

 bus in ared intermedia parallelis strictis in area anali subundulatis oblique divergenlibus, strigd 

 tertid per totam paginam ductd undulatd ad marginem interiorem cum strigd interiore connexd ; 

 punctis tribus minutis albis in ared costali origins strigarum interjectis ; postica strigis quatuor 

 in paribus duobus, altero mediano subinterrupto in regione anali abrupte incurvato, altero subdi- 

 midiato ad strigem marginalem interiorem finito ; ocellis analibus duobus nigerrimis, exteriore 

 iride latissimd fulvd cincto, interiore in lobo anali sito et iride angustd annulari alba prcedito, 

 super quam taenia fulva intus aureo irrorata flexuosim ad marginem interiorem ducitur. (Exp. 

 alar. 1 unc. 3 lin.) 



Anterior wings, in the female, above, bluish white, with broad exterior and posterior borders, and 

 a short oblique black stigma on the disk; hinder wings, variegated white and brown with nar- 

 rower borders, both pair being sprinkled at the base with a light blue silvery cloud of atoms, 

 spreading on the hinder wings along the interior margin ; fringe light gray, in the hinder wings 

 bordered within by a black thread, edged interiorly with white ; anal appendages black, sur- 

 rounded exteriorly with white, bearing at the inner edge a fulvous spot and a minute green 

 silvery lunule ; tails black and tipt with white : underneath the surface of the wings is brownish- 

 gray and marked with white striga?, three of which pass close to, and parallel with, the posterior 

 margin, through both pair, the intermediate striga, consisting of wedge-shaped marks, with the 

 points directed inwards, and the interior one of lunular marks ; the anterior icings have further 

 between the middle of the surface and the marginal series four striga;, two of which form on the 

 disk a short regularly parallel pair, with a fainter intermediate streak ; they are continued in 

 the anal area by two undulated slightly diverging striga; the third striga extends, slightly 

 waving in a gradual curve across the wing, being united posteriorly with the second, and the 

 fourth reaches in a uniform character, half across the surface ; between the origin of the three 

 posterior strigee and the costa stand three minute white dots; the hinder wings are likewise 



k marked 



