308 BRITISH BUTTERFLIES. 



Fab., Syst. Pap., 329 (dindymus, Cram., 46 F, G. B. strephon, Fab,, 

 Syst. Pap., 344 (cyllarus, Cram., 27 C, D. B. quercus, Linn., Syst. 

 Pay., 222, Hb., Pap., 369, 370, 368. 



In 1817, Latreille ((Javier's Regne Animal, iii., p. 553) details at 

 length one species as representing Polyommatus. He notes it as : — 



Polyommatus. — L 'argus bleu, Geoff., Engram., Pap.Europ., xxxviii., no. 80, 

 a, h (Papilio alexis, Hb., lx., pp. 292-294). 



In 1818 (Nouv. Diet., ne\v ed., p. 509), he rightly cites to alexis, 

 Hb., " l'argus bleu " of GeofTroy, which he had previously cited to 

 " argus,'" thus showing what he first understood by " argus '.' when he 

 fixed it as the type of Polyommatus. 



In 1819, Latreille (Ency. Meth., ix.. p. 595) again deals with his 

 genus Polyommatus (which, he says, comprises the three genera of 

 Fabricius) as follows : — 



Polyommatus. — Palpes inferieurs de longueur moyenne ou courts. 

 Thecla, Fab. — Papilio betulae, pruni, lynceus, etc. 

 Hesperia, Fab. — Papilio boeticus, telicanus, amyntas, etc. 

 Lyczena, Fab. — P. gordius, phlaeas, virgaureae, alexis, adonis, corydon, etc. 



In the same year, Samouelle (Ent. Usef. Comp., pp. 241-2) follow- 

 ing Leach, gives the same subdivisions as the latter, viz. :•— 



Thecla, Fab., Leach (Polyommatus, Latr.). — Feet in both sexes all alike, nails 

 scarcely produced beyond the pulvilli, which are large ; antenna? gradually 

 clubbed ; the club elongate, cylindric oval ; hindwings tailed. 



(a) Antennae gradually clavated — Thecla betulae, pruni, quercus. 



(b) Antennas abruptly clavated — Thecla rubi. 



Lyczkna, Fab., Leach (Polyommatus, Latr.). — Legs alike in both sexes ; nails 

 projecting beyond the pulvilli, which are small ; antennas with an abrupt club, 

 somewhat ovate, compressed, or spoon-shaped. 



(a) Hindwings more or less tailed — Lycaena dispar, chryseis, virgaureae, 



phlaeas. 



(b) Hindwings with the posterior margin entire — Lycaena corydon, adonis, 



dorylas, argus, idas, artaxerxes, alsus, argiolus, cymon. 



Overlooking Oken's restriction, and following Leach and Samouelle, 

 we find Curtis, in 1824 (lllus. Brit. Ent., fo. 12), naming phlaeas 

 the type of the genus Lycaena, an action altogether ultra vires, as it 

 had already been restricted to the " blues." In 1829 (op. cit., fo. 264), 

 we find him following Swainson, and naming betulae as the type of 

 Thecla (Swainson, Zool. lllus., i-ii., p. 69). 



In 1828, Stephens (lllus. Brit. Ent. Haust., i., p. 74) groups the 

 family under the name Lycaenidae, which he subdivides into the 

 following three genera : — 



i '^ -i. l i i ni'f (pubescentes Thecla. 



. , Capitulo naud compresso. Oculi {* A - t„„,™. 



Antenna' ■< L L \ nudi . . Lycjkna. 



( Capitulo compresso .. .. .. Polyommatus. 



In these he groups the following species : — 



Thecla. — T. betulae, quercus, pruni ( = ic-albunt), spini, rubi. 

 Lyc^na. — L. phlaeas, chryseis, dispar, hippothoe, virgaureae. 

 Polyommatus. — P. argiolus, alsus, acis, arion, alcon, corydon, adonis, dorylas, 

 icarius, alexis, eros, argus, agestis, artaxerxes. 



In 1832, Boisduval (1 cones, etc., pp. 43 et seq.) groups the section, 

 under the name Lycaenides as follows : — 



Polyommatus, Latr. — P. dispar, Haw., ottomanus, Lep., ballus, Fab. 

 Aiuius. A. icarius, escheri, dorylas, eros, calliopis, artaxerxes, aquilo, donzelii, 

 admetus, rippertii, dolus, sebrus, lysimon, melanops, erebus, euphemus, alcon, iolas. 



