Publ. 15 X. 1938. 
TRIODIA; PIELUS. By R. Pfitzner |- 
1297 
rounder and broader, darker brown, forewing with broad dark transverse shadows from % of the costa to the 
inner margin, without a stigma. Costa marbled dark. The comma- like markings are united forming indistinct, 
irregularly defined circles. Thorax, head and antennae dark brown; hindwing and abdomen earth-coloured. 
Fringe brown. Under surface smoke-brown, abdomen and costal region of f'orewing yellowish brown. From 
Macas (Ecuador). — Another tiny Hepialid form belongs to this place; it was sent to me by Fassl likewise 
from the Eastern Cordilleras. I denominate it: D. (? Triodia ) nannophyes form. nov. Expanse: 22 mm. Length nannoyhyes. 
of body only 13 mm. The much rubbed forewings merely exhibit an originally dark brownish ochreous ground¬ 
colour and to the left a silver central stigma. Hindwing darker brownish grey, margin brownish ochreous, 
body greyish brown, thorax, head, antennae more brownish ochreous. From Sosomoco. 800 m. - 1 specimen 
(type); it is not well enough preserved for being figured, the marking being quite extinct in some places. 
D. (or gen. nov.?) perkeo Pf. (99 g) is likewise a somewhat doubtful tiny species which I range here yerkeo. 
provisionally. Fassl sent it to me from the Eastern Cordilleras of Colombia. He captured it on the Paso del 
Quindiu (3800 m), where he observed the $$ depositing their eggs on the grass in the midday-sun; unfortun¬ 
ately, only two badly preserved specimens were sent. Expanse of wings: 25 and 27 mm; length of body: 14 mm; 
antennae 5 mm. Forewing dark reddish ochreous, with blackish oblong dots and strigae. Hindwing diaphanous 
grey, fringe everywhere broadly dark brown, body dark brownish grey, anal angle of forewing not rounded, 
but distinctly with an obtuse angle. The habitus of the insect resembles that of certain Tineidae which Fassl 
sent me from the same locality. 
4. Genus: Triodia Hbn. 
Allied to the preceding ones, antennae longer, abdomen very long. Living in the High Andes. 
Tr. monticola Mssn. (185 b). Length of body: 18 mm, length of forewing: 18 mm. Head and thorax monticola. 
dark greyish brown, antennae ochreous, abdomen yellowish grey, projecting far beyond the hindwing. Forewing 
dark greyish brown, with a white inner-marginal stripe from the base to the centre, from where it extends to 
the apex of the wing as a band broken up into spots. These spots exhibit dark rings in the middle, and their 
colour is light grey. Between this band and the distal margin there is yet a fine row of white dots, and between 
the latter and the base a light yellowish grey stripe with a dark ring in it. Hindwing grey, yellowish grey at 
the inner margin. All the fringes brownish grey. Under surface unicoloured brownish grey, yellowish grey at 
the interior angle of the hindwing. Very variable, sometimes with hardly any marking. Ecuador (Sincholaguar), 
4200 m. Swarming in great numbers in a November night. Habits similar to those of the palaearctic Hepia- 
lus hectus. 
Tr. lucicola Mssn. ( 185 f). Length of body: 22 mm, length of forewing: 20 mm. Similar to monticola, lucicola. 
somewhat larger, much lighter, more yellowish grey, the band of spots more ochreous, basad to it several such 
spots; the white dots between the band and the distal margin indistinct, because the distal margin in its whole 
extent is almost as light as the band. Fringes of all the wings ochreous. Under surface unicoloured brownish 
grey. Fringes ochreous speckled with brown. Ecuador (Putzulagua near Latacungo). 3600 m. Like the follow¬ 
ing remota, it may be merely a local form of monticola. 
Tr. remota Pf. (99 e). Size 45—46 mm. Body very long (23—25 mm) and slender, dark brown, antennae remota. 
long (7—8 mm). Forewing: ground-colour dark ochreous, marbled lighter, the long fringes speckled. The scheme 
of markings resembles that of PI. sylvinus the triangular marking is light flesh-coloured, broad, intense, distinctly 
edged with dark. Parallel to the distal margin a double row of fine irregular rings partly centred silvery in 
the apex. Hindwing light ochreous, less dusted towards the base, fringe unicoloured brownish ochreous. Under 
surface: light ochreous. From Challabamba, Peru, at an altitude of about 4000 m. Types (2 specimens, one 
of them much damaged) in the Coll. Pfitzner in the Museum Senckenberg in Frankfort on the Main. 
5. Genus: I*ielus Wkr. 
Antennae strongly pectinated. Robust, of a Bombycid-like habitus. The most magnificent represen¬ 
tatives of the genus occur almost exclusively in Australia; merely one relatively small species in America. 
P. luteicornis Berg (99 h). Thorax greyish brown, abdomen intensely covered with ochreous hair. An- luteicomis. 
tennae brownish ochreous. Wings hyaline, diaphanous, forewing brownish ochreous. with whitish markings, 
hindwing lighter, costa ochreous. 45—55 mm. My series comprising about 20 specimens shows that the species 
does in general not vary much. — How r ever, there occurs, without any transitions, a form without any markings, 
similar to Hep. gallicus. I denominate it popped form. nov. ( luteicornis was formerly ranged as l Mep. popperi yoyyeri. 
i. 1.”). Patagonia, Fuegia, and particularly at the Magellan's Str. Taken near Punta Arenas from March 13th 
to 17th (flying about in especially great numbers after a cyclone); Rio Grande, Eastern Fuegia, in February. 
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