132 LEPIDOPTERA HETEROCERA 
90. GENUS OOSPILA, WARREN 
Oospila. Warren, Novit. Zool. Vol. 4, p. 426 (1897). 
Drucia 1). Warren, ibidem, Vol. 7, p. 133 (1900). 
Halioscia. Waren, ibidem, Vol. r4, p. 202 (1907) (indescr.). 
Characters. — Face smooth. Palpus moderate to long, not long-scaled, third joint in cf small 
or moderate, in Q long to very long; smooth. Tongue present. Antenna rather short, in of bipectinate 
with long branches, apical one-third nearly simple; in Q similarly bipectinate, or with more moderate 
branches, or lamellate, nearly simple. Pectus hairy. Femora usually somewhat hairy. Hindtibia in gf 
often clothed with extremely long hair on inner side, in both sexes with terminal spurs only. Abdomen 
with compact, glossy crests (Fig. 1 2). Frenulum in cf short, 
Fi. 12 usually slender, from before well-marked basal expansion, 
retinaculum near base of forewing; Q frenulum wanting. Fore- 
wing with costa gently arched. apex moderate or rather acute, 
termen straight or gently rounded, moderately convex, cell 
less than one-half, DC usually rather straight, DC? occasionally 
strongly incurved, SC! from cell, free or anastomosing with C, 
SC? normal, R! shortly to rather long-stalked, perhaps occasi- 
Lateral view of Oospi/a coerulea, Warren, &. 
onally connate, R? usually from well above middle of DC, 
M! usually short-stalked, occasionally connate or (quite exceptionally) separate, hindwing with termen 
variable in shape, either regularly rounded, slightly ventricose in middle, or more or less tailed at R? or 
at R! and R?, tornus pronounced, cell short, DC? usually curved, DC? oblique, typically azising con- 
siderably distally. C appressed to SC to one-half cell or less, then rapidly diverging, SC? long-stalked, 
M! stalked. 
Early stages unknown. 
A rather large genus, showing some amount of structural variation, but not at all excessive. The 
shape of the hindwing cannot, so far as we can see, be utilized as generic; Warren places a few of the 
most strongly tailed forms as a separate genus, Drucia, but includes there forms in which the shape is 
very diverse, while he also admits into his other genera some which are more or less tailed (e. g., RacAeo- 
lobha heteromorpha). The small group with non-pectinate Q antenna (coerulea, derasa, etc.) may possibly 
be tenable as a genus, but we have not even ventured to make it sectional, so many of the females being 
still unknown. Finally, it might be possible to split up the genus on the discocellulars of the hindwing; 
in the type-species and many others these are as described above, but in the coerulea-group and others 
they are almost straight (oblique), and in a few (e. g., conversa) DC? is strongly incurved. A very 
prevalent, though not invariable feature in the genus is the presence of an oval or roundish raised white 
cell-spot on DC? of the hindwing, often in addition to the ordinary cell-spot, which may be.dark or 
white, and is placed about the middle of DC*. 
Tyne of the genus : Oosfila trilunaria (Guenée) — Racheospila trilunaria, Guenée (1897). 
Geographical distribution of species. — Neotropical. 
1. O. trilunaria (Guenée). Brazil. 
Phorodesma trilunaria, Guenée, Spec. Gén. Leép. Vol. o, p. 372 (1858). 
Conibaena trilunaria, Walker, List Lep. Ins. Brit. Mus. Vol. 22, p. 570(1861). 
Oospila trilunaria, Waxren, Novit. Zool. Vol. 4, p. 426 (1897). 
Racheolopha trilunarta ab. obsolescens, Warren, ibidem, Vol. 16, p. 86 (1909). 
1) Not preoccupied by D»rcea, Kirby (1802). 
