174 
[January, 
DESCRIPTION OF A NEW GENUS OF DIURNAL LEPIDOPTERA BE- 
LONGING TO THE FAMILY ERYCINIBM ; WITH CHARACTERS OF 
TWO NEW SPECIES. 
BY A. G. BUTLEE, F.Z.S. 
Metachaeis, gen. nov. 
Anticce maris subtrigonatce, apice acuto ; femince magis elongates, 
apice suhconvexo ; corpus maris robusimn, femince tenue ; antennis 
elongatis fenuibus, clava elongata teniii ; palpis minimis ; alee supra venis 
plumb eo-acuminatis. 
Wings of male generally dark on the upper side ; of female fer- 
ruginous, spotted with black ; both sexes with plumbaceous terminations 
to the nervures ; the wings of male frequently 
shot with purple or blue below ; the neuration 
the same as in Lemonias* : the body of male 
robust, elongate ; of the female short, slender : 
the antennae long, with slender and gradually- 
formed club ; the palpi very short, as in CJiaris. 
This genus is intermediate between Le- 
monias and Charis ; from the former it differs 
in its minute palpi, and in the leaden or silvery 
sub-marginal streaks on the upper side ; from the 
latter, in its longer antennse with more slenderly 
formed club, and its much greater size ; the 
females with elongate wings, as in some species 
of Lemonias ; in coloration it chiefly differs in 
having the nervures tipped with plumbaceous 
or silver, in place of the ordinary silvery sub- 
marginal lines. The typical species are Hesjyeria 
Ptolomaus (Fabric), Papilio Agrius, (Dalm.), 
and Charis Cadmeis (Hewits.) 
The insects composing the present genus 
are natives of South America. 
1. Metachaeis PtolomjEus. 
(J. Hesperia Ptolomseus, Fabricius, Ent. Si/sL, iii., pt. 1, p. 319, 
n. 209, (1793) , Donovan, Ins. hid., pi. 46, p. 6, (1800). 
Erycina Ptolomseus, Qodart, Enc. Meth. ix., p. 572, n; 88, (1819). 
Lemonias Ptolomseus, Westioood, Gen. Diurn. Lepid., p. 459, n. 19, 
(1851). 
$ . Hesperia Lucius, Fabricius, Ent. Si/st., iii., pt. 1, p. 320, 
n. 211, (1793). 
Brazil. c?. P.M. 
1. Palpus of Lemonias 
la. Club of antenna of ditto. 
2. Palpus of Metacharis. 
2a. Termination of antenna of do 
8. Palpus of Charis. 
3a. Club of antenna of ditto. 
The arrangement of the sub-costal nervules appears to differ slightly in some of the species. 
