46 RHOPALOCERA. 
9. Pteronymia notilla. 
Pteronymia notilla, Butl. & Druce, Cist. Ent. i. p. 96'; P. Z. 8. 1874, p. 332’; Butl. Lep. Ex. 
p. 140, t. 1. £.7°. 
Pteronymia olyrilla, Butl. & Druce, Cist. Ent. i. p. 96°; P.Z.S. 1874, p. 382°; Butl. Lep. Ex. 
p. 140, t. 1. f. 6°. 
3S. Alis hyalinis, anticis venis nigris divisis et nigro circumcinctis, margine interno basin versus vix ful- 
vescenti tincto, area interna fumosa apud cellule finem obscuriore, parte apicali maculis pallidissimis flavis 
(una subquadrata extra cellulam, tribus inter eam et marginem externum et sex submarginalibus) notata ; 
posticis pallide ferrugineis nigro extus marginatis: subtus ut supra, sed anticis (in apice) tribus, posticis 
quinque (in margine externo) atomis albis ornatis; antennis nigris. 
@ mari similis, sed coloribus letioribus, maculis anticarum flavis magis distinctis et cellule apud finem 
macula indistincta flavida notata. 
Hab. Costa Rica (Van Patten'*), Irazu, Caché, and Rio Sucio (Rogers). 
The sexes of this insect were described as distinct species by Messrs. Butler and 
Druce **, who compared the female with Ithomia donella, Feld. (of which JI. alinda, 
Feld., is the male), and the male with J. /atilla, Hew. With the former of these insects 
P. notilla is allied ; but the latter belongs to a different section of J¢homia, in which 
the upper discocellular nervule of the secondaries is wanting, and the upper radial 
appears as a branch to the subcostal. In P. notila, as in P. alinda, both the upper 
discocellular and the upper radial are absent. In P. alinda both the costal and sub- 
costal nervures are contorted, being simple curves in P. notilla; besides, the mner 
margin of the primaries is rufous in the former and black in the latter insect, so that 
the two are really easily recognized species. 
P. notilla appears to be a common butterfly in Costa Rica, but has not yet been met 
with outside the limits of that Republic. 
10. Pteronymia fulvescens, n. sp. (Tab. IV. figg. 8, 9.) 
Ithomia latilla, Butl. & Druce, P. Z. 8. 1874, p. 832° (nec Hew.). 
P. fulvimargini similis, sed antennarum tertia parte apicali flava, posticarum linea submarginali fulva valde 
indistincta et feminse area posticarum interna fulvescenti perfusa distinguenda. 
Hab. Costa Rica (Van Patten 1), Rio Sucio, Irazu, and Caché (Logers). 
This species has nearly the coloration of Jthomia latilla, Hew., but differs from it in 
the absence in the secondaries of the upper radial, which in J. latilla appears as a 
branch to the subcostal. The yellow tips to the antenne and other characters distin- 
guish it from P. fulvimargo. We have only seen Costa-Rican examples of the species, 
where, however, it would seem to be a common insect. 
