178 Explanation of Plates. 



resemblance to the Everid, E. argiades 

 (Fig. 3). 

 Figs. 1 and 3 illustrate the small amount 

 of eversion (as distinct from mere 

 retraction, which is very frequent in 

 most Lepidopterous Families) that 

 occurs in non-Plebeiid Lycaenines, 

 perhaps more marked than usual in 

 L. boetica (PI. LVI). 



Plate XLIX. Chilades trochilus, <J and $, X 25. 



Plate L. Chilades cnejus, <$ and $, X 25. 



Plate LI. Chilades laius, $ and $, X 40. 



Plate LII. Chilades pandava, <$ and $, X 40. These are the only 

 species of this genus I happen to know ; I illustrate 

 them because they are very interesting as the only 

 tropical group of Plebeiids (that I know of). That 

 Chilades was Plebeiid, was, I think, first stated by 

 Tutt, on my authority, in Brit. Lep., vol. x, p. 157. 

 In the $ $ the terminal plate is lozenge-shaped (refer 

 PI. XL VI), this is hardly exceptional, and otherwise 

 the $ parts are typically Plebeiid. The <$ $ are 

 less typical. The hard process of the clasp is 

 long and curved, the dorsal processes and hooks 

 are slender and curiously like each other, and the 

 aedeagus has a more elaborate terminal armature 

 than usual; one supposes this may have some 

 relation to the special form of the terminal plate 

 of the rein. It would perhaps be going beyond the 

 subject of the present paper to discuss the matter 

 of two of these species having long rested in the 

 genus Catachrysops, on the ground of their having 

 tails. No other Plebeiids are tailed — still, the 

 question of tails amongst the Blues has had too 

 much weight attached to it. Some species have 

 both tailed and tailless forms ; a tailed species or 

 two, therefore, within the tribe of Plebeiidi, which 

 we conceive as tailless, ought not to surprise us, 

 as I admit as to myself it does to some extent. 

 Whatever the subjective conditions may be, it is 

 certain that the four species here noted are con- 

 generic. I have, however, so far as possible avoided, 

 in this paper, systematic questions. 



