Frrepay.—On a new (7) Genus and Species of Butterfly. 265 
between the externo-medial (a, figs. 2 and 8) and innermost (b, figs. 2 and 
8) sub-costal nervures,* at their junction with the vein closing the discoidal 
cell, is rather broader than in P. pluto; none of the nervures dilated at the 
base. 
Type—E. butleri. 
The accompanying diagrams (plate IX.) represent : 
Fig. 1. The disposition of the nervures in the primary wings of F. blandina. 
2. Do. do. do. do. P. pluto. 
8. Do. do. do. and anie wings 
of E. but 
and are given for comparison; the figures enlarged to two dide. 
Not having the descriptions of all the genera of the Satyrine, I should 
hesitate in forming a new genus for this insect; but, as “the lower radial 
of primaries emitted above the angle of the diseocellulars instead of below 
it," is given by Mr. Butler} as one of the distinctive characters of his new 
genus Percnodaimon ; and as the now-describing butterfly has the like char- 
acter, but disagrees with Percnodaimon in the form of the club of the 
antenns, and the presence of the first sub-costal nervure ;{ I may reason- 
ably assume that it differs from all the other genera, and have therefore 
ventured to describe it as a new genus. 
Erebiola butleri, sp. no 
Primaries: Upper-side smoky black ; a white- via black ocellus between 
the externo-medial and innermost sub-costal nervures, and equidistant 
between the discoidal cell and hind margin. Under-side ferruginous, suf- 
fused (except the apical and hind-marginal area) with slaty black ; ocellus 
as on upper side; a sub-hind-marginal row of four whitish marks, the two 
nearest the apex being the more distinct and silvery, followed by a dusky 
shade on their outer margin. 
Secondaries: Upper-side smoky black; a transverse row of three minute 
white dots near the hind margin; the dots arranged in a straight line 
pointing towards the anal angle, and situated respectively between the 
externo-medial, subexterno-medial, interno-medial, and subinterno-medial 
nervures. Under-side ferruginous, suffused with a dusky shade from the 
base to the transverse row of spots; a longitudinal discoidal streak of 
silver; a transverse row of three silvery spots near the hind-margin, 
followed by two small longitudinal silvery streaks near the anal angle; ; also, 
* The Orismology in Kirby and Spence’s Introduction to Entomology (the only au- 
thority I have) is followed in describing the nervures.—R.W.F. 
1 Ent. Mo. Mag. XIII., p. 152. 
1 As Mr. Butler does not mention the absence of this nervure in describing his genus 
Percnodaimon, I imagine he must have overlooked it.—R.W.F. e 
