ORTHOSIA. By Dr. M. Draudt. 
159 
0. ferrigera Danby d? Green (= strigatteria Hill.) (23 f) has quite light yellowish-white forewings strewn ferrigera. 
with ferruginous brown, the veins strewn with black, with ferruginous-brown, undulate transverse lines; of 
the maculae only the reniform macula is present, pupjlled ferruginous-brown and finely surrounded with 
blackish; the undulate line is proximally shaded with ferruginous brown. Hindwing reddish white, strewn 
with dark. Canada, United States. — puncticostata Dyar has almost extinct markings and no dark veins, puncticosta- 
0. macona Sm. resembles the following species; forewing yellowish-grey, strewn with blackish, with macona. 
lighter veins; the transverse lines are coloured like the ground or somewhat lighter, with or without a blackish, 
mostly irregularly interrupted border, in the anterior line on both sides; the maculae are large, in lighter rings 
and below confluent, the reniform macula filled up with blackish owing to the rectangularly flawed median 
shade penetrating into it; the undrdate line is often lighter than the ground, proximally more or less shaded 
with blackish. Hindwing light reddish with a dark central dot and a punctiform postmedian line. Expanse 
of wings: 34 to 37 mm. California. 
0. flaviannula Sm. (23 g) is more reddish-brown, strewn darker, the beginnings of the almost extinct flaviannula. 
transverse lines marked by dark costal-marginal dots, the anterior line projecting light below the cell; the 
darker red-brown reniform macula is encircled with light; the light undulate line is towards the costal margin 
proximally bordered with a darker colour. Hindwing reddish-white, strewn with brown. Colorado. 
0. annulimacula Sm. (23 g) is very similar, but much larger and more greyish-brown, the transverse annulima- 
lines marked by dark dots on the veins. From Texas. cula • 
0. rubrescens Wkr. (= venata Sm.) (23 f) is densely striated red-brown on a reddish-yellow ground, rubrescens. 
the discal area dusted darker; the posterior transverse line is marked by black and whitish streaks on the 
veins, the anterior line is absent; maculae large, in yellowish rings, the reniform macula with a darker filling, 
the yellowish undulate line is quite extinct. Hindwing yellowish greyish-brown. Canada, United States to 
Pennsylvania. 
0. tenuimacula B. & McD. (23 h). Forewing uniformly smoothly yellow-reddish with double trans- tenuimacu- 
verse lines of which the parts facing each other are more distinct and darker brown; of the maculae only the ?a - 
sand-glass shaped, narrow reniform macula is present and surrounded with light yellowish, below pupilled 
greyish-brown, before it a rectangularly bent, broad, brown medan shade; instead of the undulate line there 
is a row of small black spots; distal margin somewhat tinted pink. Hindwing smoke-grey with pink fringes. 
Described from Texas. 
0. mediomacula B. db Benj. is extremely similar to tenuimacula (23 h), but much smaller and more mediomacu- 
slender with much shorter palpi, with shorter, more lobate valves. Forewing smoothly and uniformly scaled la - 
yellow-reddish grey with otherwise the same markings. Expanse of wings: 32 to 34 mm. From Arizona. 
0. nongenerica B. &• Benj. is likewise closely allied, of a more variable colouring, ochreous-yellowisli, nongeneri- 
violettish-grey or red-brown, the extreme costal margin often yellowish; the markings are similar to those ca - 
of the two preceding. The genital organ is similar to mediomacula, but it has a differently shaped clasper. 
Expanse of wings: 34 to 36 mm. New Mexico. 
0. carminata Sm. (23 g) is of a variable colour changing from a quite uni-coloured light yellowish grey carminata. 
to a reddish yellow, on the veins dusted with purple pink; all the markings are absent except a small, light, 
extinct discal spot instead of the reniform macula. Hindwing blackish-brown with yellowish fringes. Colorado. 
0. arthrolitha Harv. (23 h). Forewing reddish yellowish brown, strewn with blackish, with extinct arthroUtha. 
transverse lines and median shade, the posterior line removed far towards the margin and finely dentate with 
traces of a doubling; between the maculae with very indistinct yellowish rings there is a quadrangular dark 
spot in the cell; the undulate line consists of minute blackish internerval spots. Hindwing blackish-brown. 
California. 
0, garmani Grt. (23 h) is reddish-brown, dusted dark, with quite indistinct transverse lines, the anterior garmani. 
line traceably double, the maculae incompletely surrounded with blackish, the ring-macula elliptical, also 
the coniform macula marked by black scales; the undulate line is quite indistinct, proximally with small 
black spots. Hindwing light brownish-yellow. United States (Illinois, Iowa). 
0. pacifica Harv. (23 h) is on the light ochreous-brownish forewing densely striated and strewn with pacifica. 
red-brown and dusted with purple, the transverse lines marked by dots on the veins; the large maculae are 
in light rings, the reniform macula is below pupilled dark, between them an angular dark median shade; the 
light undulate line is proximally shaded with dark. Hindwing smoke-brown, in the form infrapicta Strd. infrapida. 
beneath with a black streak in the cell. Canada to California. — The larva is green with fine white dorsal and 
subdorsal lines and a white transverse band on the raised 12 th ring. 
0. revicta Morr. (= subterminata Sm.) (23 g) is of a very variable colour, bluish-grey, yellowish-grey revicta. 
changing to red-brown, in light specimens strewn with brown, in dark specimens with whitish; the trans¬ 
verse lines on the averted sides brodered with whitish, the posterior line with black and white dots on the 
veins; the large maculae are in whitish rings and finely surrounded with brownish-red, the reniform macula 
below with a darker filling, between both a broad red-brown median shade; behind the white or yellowish 
