ONCOCNEMLS. By Dr. M. Draudt. 
183 
0. rosea Sm. (26 g) resembles chorda, but it is easily distinguished by the presence of the two upper rosea. 
maculae representing small whitish spots, and by a faint median line; undulate line whitish, proximally with 
small brown sagittae. Hindwing white with brown veins and margin. Colorado. 
0. youngi McD. Forewing fawn-coloured, in the central area light brown, in the terminal area purple youngi. 
grey with single black transverse lines, the posterior line forming a sharp angle on the middle radial vein, the 
small maculae surrounded with black, the narrow coniform macula also being present. The whitish hindwing 
is smoky in the distal third with traces of a darker transverse line before it. Expanse of wings: 38 mm. British 
Columbia. 
0. Columbia McD. belongs to the same group and has deep purple grey forewings being postmedianly Columbia. 
somewhat lighter. The single black transverse lines are distinct, the anterior line being bordered by the bow 
of the coniform macula, whilst the posterior line is traceably crenulated on the veins; the ring-macula is large 
and round, the reniform macula is short and broad; a darker undulate line is traceable. Hindwing in the basal 
half white, distally and on the veins smoky. Expanse of wings: 30 mm. British Columbia. 
0. simplicia Sm. (26 h). Forewing yellowish-redbrown, marked as in Columbia, but the posterior simplicia. 
transverse line almost extinct; the strong, black anterior transverse line is on the submedian fold connected 
with the subbasal transverse line by a black streak. Maculae in light rings, the undulate line marked by single 
small light scales. Hindwing diaphanous yellowish-white, at the margin darker. Colorado. 
0. deserta Sm. was described as Homohadena, but it belongs hereto and is allied to the preceding, dcserta. 
Forewing dark greyish-brown, in the costal area lighter with dark-striped veins; the subbasal line and the 
anterior strong transverse line are connected on the submedian fold, the posterior transverse line is fine, the 
maculae in light rings, the ring-macula obliquely elliptical; the undulate line consists of small light spots, behind 
them black internerval streaks. Hindwing white with dark veins and margin. Expanse of wings: 31 mm. 
Colorado. 
0. punctilinea Hmps. (26 h). Forewing monotonously brown with dark-striped veins, the transverse punctilinea. 
lines more or less broken up into dots, the small maculae with faint whitish rings, the reniform macula centred 
with blackish; undulate line whitish. Hindwing light reddish-brown, at the margin darker. Arizona. 
0. bakeri Dyar (26 h) has grey forewings with a brown marginal area, strong black transverse lines, bakeri. 
the maculae white-ringed, encircled with black and centred with brown, and there are also traces of the coniform 
macula; the undulate line is entirely absent. Hindwing diaphanous white, with brownish veins and margin. 
Nevada. 
0. pohono Sm. (26 h) is somewhat like bakeri, darker, more brownish-black, the transverse lines on pohoyio. 
the averted sides bordered with a lighter colour; the ring-macula is very small, surrounded with black, the 
reniform macula narrow, distally scaled whitish; behind the postmedian line black vein-dots, the irregular 
undulate line is proximally bordered with a darker colour. The brownish hindwing has a darkened margin. 
On the Californian mountains *). 
0. homogena Grt. (26 h) is larger than the preceding, more variegated owing to red-brown irroration homogena. 
on the greyish-white ground, with darker, prominently blackish-brown central and marginal areas, somewhat 
faded transverse lines and broad median shadow; the maculae are brownish-grey, surrounded with black, the 
ring-macula is oblong; undulate line as in pohono, fringes speckled. Hindwing light brown, at the margin darker. 
From Colorado. 
0. umbrifascia Sm. (26 i). Forewing on its greyish-white ground coarsely strewn with brown, very umbrifas- 
conspicuous by the brownish-black central area, which is defined by white transverse lines, the posterior of cia - 
which encircles the reniform macula in a large bow; in the brownish irrorated marginal area the undulate line 
is absent. Hindwing brownish, margin and vein darkened. Colorado. 
0. piffardi Wkr. (= atrifasciata Morr.) (26 i) is larger, more blackish-brown, the central area is deep piffardi. 
black, without maculae, the posterior transverse line therefore does not form a bow; the undulate line is marked 
by dark shading, in the blackish marginal area there are internerval streaks. Hindwing white with a broad 
black marginal band. Canada, United States (Maine, New York). 
0. barnesi Sm.. (26 i) has brownish-grey, postmedianly more purely brown forewings with slightly bamesi. 
bent broad black transverse lines, without maculae and undulate line, and black veins and internerval stripes 
in the marginal area. Hindwing whitish, towards the margin darkened with blackish. United States (Yellowstone 
Park). 
0. figurata Harv. (26 h) is similar, smaller, more brownish on its greyish-white ground, likewise figurata. 
without maculae, the transverse lines below the cell bent towards each other and submedianly connected by 
a black streak; from the cell-end a black streak extends to the distal margin which shows black internerval 
streaks as in the preceding. Hindwing reddish-brown. Colorado, Nevada. 
0. major Grt. (26 i) is a large species with brownish-grey forewings and indistinct transverse lines major. 
marked by vein-streaks and dots, and a brown median shadow, the oblong ring-macula being almost confluent 
* pohono, acording to the latest researches, belongs as a synonym to niveirena Harm in the genus Namangana 
(see there!) together with Bryomima falsa, their generic position, however, is not yet certain. 
