OLIGIA. By Dr. M. Draudt. 
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streaks. Hindwing brownish-black. Canada. — The form transfrons Neum. (= ferrealis Grt.), described trcmsfrons. 
as Polia, and probably the same as iridis Dyar, is probably nothing else but bridghami (33 i). 
0. fractilinea Grt. (33 i) represents a very variable small species being brownish-grey on the forewing, jradilinea. 
mixed with reddish, in some parts (especially in the costal half of the median area) darkened, in the basal and 
postmedian areas more whitish. The small maculae are finely surrounded with black, the hindwing is ochre- 
brownish. •—- The form vulgivaga Morr. is more reddish-brown mixed with some purple grey, without the whitish vulgivaga. 
areas, in the marginal area blackish. -— mactatoides B. &• McD. (33 c), in contrast with it, is more whitish-grey, madatoides. 
only slightly mixed with reddish. — The western race, from Utah, albescens B. &■ McD. (33 i) is quite pale albescens. 
yellowish-reddish with faded markings, also the hindwing is much lighter; only at the costal and distal margins 
there is some darker irroration. •—- una Streck. is quite uniformly brownish-grey, the transverse lines on the ana. 
the submedian folg connected by a black streak. The latter form is described from Wisconsin, whilst the others 
are widely distributed from Canada to Colorado and New Mexico. 
0. arbora B. da McD. (33 i) is apparently allied to none of the other species. Forewing deep purple arbora. 
brown, with double, lighter filled transverse lines, the macidae finely surrounded with black, at the reniform 
macula outside with 3 white dots, behind the coniform macula before the postmedian line spotted black. Marginal 
area darker, somewhat blue-scaled, hindwing smoky-grey. Arizona. 
0. misera Grt. (33 b). Forewing on the dark red-brown ground irrorated with blackish, with indistinct misera. 
transverse lines which are spotted yellowish-grey on the averted sides, the maculae are surrounded by black, 
in the reniform macula there is a small whitish luna; instead of the undulate line there are small yellowish- 
white spots. Hindwing reddish greyish-brown, at the margin darker. United States. 
0. minuscula Morr. (33 k) is smaller, more purple grey, with a black connecting streak between minuscula. 
the transverse lines on the submedian fold; the small maculae are in whitish rings, the reniform macula without 
a small whitish luna. Hindwing greyish-brown. Canada to Massachusetts. 
0. diversicolor Morr. (33 i) is distinguished by the contrast between the dark brown basal area diversicolor. 
and the light distal part of the forewing; the anterior transverse line is double, filled up with whitish, the brown- 
centred maculae are finely surrounded with black. Hindwing light brown, at the margin darker. United States 
(New Hampshire, Massachusetts, New York). -—• The straw-coloured larva with a pink hue on the dorsum bores, 
with its head turned down, into Scirpus cyperinus in July and pupates in the earth. 
0. semicana Wkr. (= latireptana Grt., hausta Grt.) (33 a) is very similar to diversicolor , but only half semicana. 
its size; both the transverse lines, in the place of the coniform macula, are connected by a black streak, also 
the posterior transverse line is double, filled up with whitish. Hindwing brownish-grey, at the margin somewhat 
darkened. United States to New Mexico. 
0. exhausta Sm. (33 i) is also a very small species, light brownish-grey, in the median area darker exhausta. 
irrorated, with double transverse lines filled up with whitish, and vein-dots behind the distal line, and a black 
streak connecting the two lines on the submedian fold; before the indistinct pale undulate line irrorated with 
brownish-grey. Hindwing smokv-grey. Atlantic States. 
0. tonsa Grt. (33 i) is another small species of a greyish-black ground-colour, the double transverse tonsa. 
lines filled up with grey and submedianly connected; the grey-centred maculae are in whitish rings, between 
them there runs an intense black median shadow; behind the grey, darker shaded undulate line the marginal 
area is darkened. Hindwing greyish-brown, at the margin darker. Nevada, Arizona. An extremely variable 
species. -—■ The form fasciata B. <b McD. (33 k) is distinguished by the very light, greyish-white forewing with fasciaia. 
a distinctly prominent dark median band; described from Utah. -—- subjuncta Sm. (33 k) also lias a somewhat subjunda. 
more prominently dark brown median area. -— laevigata Sm. (33 1) is the form with the basal area darkened laevigata. 
by black, whereas the whole postmedian area is greyish-white. The latter form is known from Colorado and 
California, whilst subjuncta is known more from northern districts, such as Canada. 
0. includens Wkr. (= norma Morr., penita Morr., mariae Grt.) (33 1). Forewing ochre-reddish with includens. 
an oblique band from the apex and the basal half of the hindmargin being much lighter; the anterior transverse 
line is almost straight, the feeble posterior line is distally accompanied by the light apical shadow; the ring- 
macula is absent, the reniform macula is a small whitish luna on a blackish spot which is suffused with black 
in the form lunaris Strd. (= ab. 1 Hmps.). Canada, Eastern and Central States. — The brownish larva bores lunaris. 
into Carex stricta. 
0. nyctichroa Jones (33 1) has dark red-brown forewings, the basal area, the distal half of the median nydichroa. 
area, and the marginal area being irrorated with black; transverse lines double, filled up with grey, between 
the small grey maculae with a straight black median line; in the marginal area there are black internerval 
streaks. Hindwing blackish-brown, at the anal angle with a small white and black spot. Brazil. 
