LEPIDOPTERA. 



69 



both extremities, of a brown colour. Antenna: filiform, of moderate length, straight to the 

 origin of the club, where they are rather suddenly refracted or bent outward; joints, short and 

 gradually thickening at the base and apex, slender and elongated in the middle ; club ovate 

 compressed, or grooved with slightly involuted margins. Palpi longer than the head, slightly 

 porrected ; basal joint and posterior part of the intermediate joint closely applied to the head, 

 anterior part of the latter and third joint bent upwards; basal and intermediate joints covered 

 solely with minute scales and lengthened hair; third joint short, slender, attenuated, and naked. 

 Proboscis nearly double the length of the palpi, but varying in different species. Head rather 

 broad. Eyes large and prominent. Body slender, compressed. Wings: anterior, rather 

 elongated and narrow, bounded by a regularly defined posterior margin ; posterior wings some- 

 what lengthened at the anal angle, (and dentated) or provided with short, filiform, abruptly 

 terminated tails. Feet invariably perfect in all parts. (In the Wiener Verzeichnis, the ante- 

 i-ior feet are described as somewhat reduced in size.) The tarsi of the fore leo-s, in the male 

 are attenuated, and terminated by a a single claw, or by a corneous bristle, which is met at 

 each side by a series of acute spines ; in the female there are two strongly curved claws partly 

 concealed by tufts of hair. The spine arising from the thighs of the mid-legs and the general 

 character of these, as well as of the claws and pulvilli, are the same as in Polyommatus. 

 This genus is illustrated, on the second plate, by the dissections of the Lyccena Roxus ; fig. 4 ; 4, 

 a; 4, b; 4, c; 4, d; 4, e; 4, f; and on the fourth plate by those of the Lyccena Elpis ; fig. 

 1, b; 1, c; 1, d; 1, e. The larva and chrysalis of Lyccena Mlianus are also represented on 

 the fourth plate ; fig. 1 ; 1, a. 



It appears from a review of the generic characters of Polyommatus and Lyccena, that, if my views are 

 correct, the distinction depends primarily on the variation of the metamorphosis ; the larva, in the former 

 being regularly rounded or cylindrico-gibbous, in the latter more oblong and impressed at the sides : of the 

 latter the Javanese Collection contains one example ; I have been less successful in the discovery of the 

 former. Although our acquaintance with the metamorphosis of the subjects belonging to the two genera 

 now described, is still very imperfect, enough is known to confirm us in the expectation of finally obtaining 

 a natural arrangement, which can only be accomplished by a knowledge of the entire history of these 

 animals. In the antennae and palpi of these two genera, no tangible difference can be pointed out. The 

 distinction derived from the wings is more decisive ; in each of the genera these organs have a peculiarity of 

 habit, which, though not easily described in words, is readily seized by an experienced eye. The Blues 

 are altogether without tails, and their character is well preserved in the Oriental tropical regions, but it is 

 remarkable that in this part of the world, as far as I have observed, no true Coppers have been discovered, 

 which in Europe chiefly constitute the genus Lyccena. The feet and claws of Polyommatus and Lyccena 

 have not, as yet, been examined and described with the accuracy and minuteness which they require, and 

 I offer with diffidence the modifications which I have proposed, in the characters of these genera, to the 

 candid consideration of Entomologists. They are founded chiefly on the examination of Pol. Puspa and of 

 Lyccence Roxus and Elpis : of all these, numerous specimens have been submitted to repeated microscopical 

 observations, the result of which is that in the male the tarsi are attenuated to a point, provided at the sides 

 with rigid bristles, and terminated by a single claw, or by an obscure corneous spine ; while in the female the 

 last joint of the tarsus is uniformly broad, and the claws are partially concealed by lateral tufts of hair ; when 

 these are removed, two short claws become apparent, which are strongly curved. 



In all the Indian species of Lyccena contained in our collection the posterior wings are entire, and they 

 are provided with short filiform tails, agreeing with the division D. /}• established by MM. Latreille and 



Godart, 



