230 OENEIS. By G. Weymer. 



,/iisUiri. C. gustavi Sfgr. {= Satyrus g. aut.) should perhaps be placed here. Above dark smoke-brown with a 



long light brown macular stripe before the margin, in which are placed on the forewing a black eye-spot 

 before the apex and 1 or 2 small ones above the anal angle and also on the hindwing some black spots. The 

 fringes are a mixture of light and dark grey, chequered with black. On the under surface the forewing is 

 partly blackish, partly browaiish grey or light grey with 4 short, streak-like yellow-brown longitudinal stri])es. 

 The ocellus in the first of these stripes is larger than on the upper surface. The hindwing btncath is dirty 

 grey with sharply prominent light grey veins. The yellow-brown longitudinal stripes of the upper surface are 

 here only verv short. In the Bolivian highlands at 4fiOO m., discovered by OrsT. Garlepp. 



20. Genus: Ooiici«4 Hhn. 



The chief distinguishing character of this genus is that none of the veins are swollen, but only the costal 

 of the foi'ewing is much thickened at the base. Otherwise the neuration is similar to that of the preceding genus. 

 The costal margin of the forewing is fairly straight, the cell long and narrow, the apex produced, hence the 

 distal margin I'ather oblicpie. The ,^,^ of several species have a stripe of scent-scales behind the median on the 

 upperside of the forewing. The palpus is long, with bristly hairs, the antenna short, with the club gradually 

 thickened. The butterflies are of medium or below the medium size and of yellow, yellow-brown or grey-brown 

 colour, nearly all with the underside of the hindwing light and dark maibled and beaiing a dark median band. 

 Their area of distribution embraces |^the arctic zone and the higher mountains of the temjX'rate zone in the 

 northern hemisphere, both in the Old and the New World. Some species are common to both. Concerning the 

 Old World Oewm cf. vol. I, p. 1 17— 121, pi. 40; also vol. IX, p. 311. 



nevadensis. 0. nevadensis FhJr. (= gigas Btlr.. californica BdiK) (50 e). The largest and most beautiful species 



of the genus. Recognizable by the reddish ochre-yellow ground-colour of both wings. The scent-scale stripe 

 of the ,^(^ is very distinct. In the i^ either 1 or 2 eye-spots are present on the forewing above and beneath. 

 The second of these is placed in cellule 2. In the $ there are usually 2 eye-spots, but sometimes 3, the third 

 placed in cellule 3. From California, Oregon, Washington and Vancouver Island. From 2000 to 7000 ft. — 

 idinia. iduna Eriir. (50 f) is a somewhat larger and lighter form of gigas. The ground-colour is of a much lighter ochre- 

 yellow, especially on the hindwing, and also on the underside of the forewing. The brown striation on the under 

 surface of the hindwing is much finer, so that the white ground-colour stands out much more strongly. The 

 brown dentate lines are thinner and the distal margin narrower. From the coast-districts of northern California. 

 — The egg is irregularly and shallowly ribbed, with pale rings. It hatches in 9 or 10 days. The larva is rosy 

 ochre-yellow, with darker dorsal line and subdorsal stripes, between the two lighter longitudinal lines. On grass. 

 Concerning the pupa nothing is known, as Edwards did not bring the larvae to pupation. 



maanin'i. 0. tliacouni Edu\ This interesting species is quite like namdensis FIdr. in size, colouring and markings, 



but is distinguished from it at once by the complete absence of the large brown scent-scale spot on the upper- 

 side of the forewing in the (^, and further by the presence of a broad dark brown median band on the underside 

 of the hindwing. The species has hitherto been found only in two localities in North America, being rather 

 common at Nepigon on the northern shores of Lake Suijerior in Canada, from the end of June to the middle 

 1)1 July, in the damp, wooded grass-lands near the river of the same name. The second locality is Morley, Alberta, 

 at the eastern foot of the Rocky Moinitains, where the species was found by Macoun. — The larva is figured 

 by Holland and is 35 mm. in length. The head is round with 4 vertical black lines, the body has on the dorsum 

 several narrow dark longitudinal lines, at each side a broad subdorsal sti'ipe and above the legs a dark lateral 

 stripe with a light one above it. It lives on grass. 



chryxiif:. 0. chryxus DM. & //rw. (= Calais Sciuld.) (50 f). Similar to ?ie'm//e«,sy",s, but smaller, the forewing some- 



what more pointed, its' costal margin marbled with light and dark, the distal margin in the J consists onl)^ 

 of a narrow brown marginal line, the scent-scale spot brownish grey. Forewing in ^ and $ with 2 eye-spots 

 and a small black dot between them, hindwing with a similar anal dot. On the under surface the anterioi' 

 half of the forewing is finely striated with brown, and also the whole of the hindwing, on which 2 dentate stripes 

 enclose a broad dark median area. — The egg is whitish, the larva grey-brown with dark nebidous lines, the 

 pupa is rounded, anteriorly black-brown, posteriorly yellowish. The butterfly is widely distributed in the Rocky 

 Mountains from Colorado, where it is met with at elevations of 9 000 to 12 000 ft., to the Canadian ])rovince 

 of Alberta, where it occurs at from 4000 to 7000 ft. It flies at the end of June and in July. Calais Scudd., which 

 was described by the author as coming from Hudson's Bay, is now generally regarded as a synonym of chryxus. 



ivnlida. 0. ivall'da Mead. (55 f). This species is easily recognized by the brownish grey colour of the forewing 



and the whitish grey hindwing. A row of white-grey spots is placed before the distal margin of the forewing. 

 with a small eye-spot before the apex. The under surface is also almost entirely white-grey. The costal margin 

 of the forewing is dotted with brown to the subcostal, then in the anterior part of the cell marbled with brown, 

 some brown streaks extending to the median. The hindwing is striated and marbled with brown with lines 



