336 
MANRUTA; THYREION; RHODODIPSA. By Dr. M. Draudt. 
i lor Ida. 
elingua. 
snowi. 
rosea. 
ligeae. 
gclotopoeon. 
olivofusa. 
riojana. 
Rh. florida Guen. (48 h) is almost quite pink, only in the marginal area ochreous-yellow; the latter 
colour is also at the base of the hind-margin and occasionally in a Y-shaped median band. Hindwing yellowish- 
white. Canada. Eastern States, Utah. — The green larva with a reddish lateral spot on the 2nd ring and darker 
dorsal and lateral lines lives on blossoms of Oenothera. 
14. Genus: Manruta Sm. 
A genus rather different from its allies. Proboscis stunted, frons without a projection, palpi small, 
thinly haired, eyes round, but not large. d antennae bipectinate. The thick thorax is very densely clothed 
with long woolly hair. The broad short anterior tibia at the end inside with a long bent horny spine, outside 
with a shorter one and 2 thorns on the side. Fore wing short and broad. But one species of a Bombycid exterior. 
Type: M. elingua Sm. 
M. elingua Sm. (48 b). The yellowish-white forewing is powdered with pink and strewn with blackish, 
with blackish faded transverse lines, at the anterior line a long coniform macula; instead of the undulate line 
single small dark spots, in the blackish-strewn marginal area; maculae white. The whitish hindwing is feebly 
smoky at the margin. Arizona. 
15. Genus: Thyrelon Sm. 
In the habitus likewise resembling Bombyces, the thorax covered with thick woolly hair. Proboscis 
developed, the short palpi rather porrect, below the rounded frontal projection with a horny plate; d antennae 
serrate and tuftedly ciliated. The short broad anterior tibia exhibits at the end inside a long bent horny spine, 
outside 3 short ones. 4 sjiecies have been described. 
Type: Th. snowi Grt. 
Th. snowi Grt. (48 b). Forewing light yellow, in the basal area with 3 pink stripes, with feebly marked 
pink transverse lines and a longitudinal stripe on the discal fold to the posterior line which extends obliquely 
to the apex. The yellowish-white hindwing is a little hued with greyish-brown, at the margin tinted with pink. 
Kansas. 
Th. rosea Sm. ( = stena Sm.) (48b) has quite light yellow forewings with a red longitudinal stripe 
below the base of the cell and a post median transverse band which is mostly broken up in 2 spots on the folds. 
Hindwing greyish-brown with white fringes. — The white larva has brown tubercles, head, neck-shield, 
and anal shield, and lives in leaves and onions of species of Allium. Colorado. 
Th. ligeae Sm. (48 b). The narrow forewing is somewhat silky lustrous white, in the basal area as 
far as the antemedian line suffused with pink, and with a dull pink band behind the postmedian line. Hindwing 
greyish-brown with yellowish-white fringes. California. 
Th. gelotopoeon Dyar (48 c) is externally very similar to Hel. obsoleta ; forewing brown with a darker 
subterminal band and fine brown transverse lines, the anterior line forming 3 bows, the posterior line being 
dentate with white dots behind it; between the maculae, which are finely surrounded and centred with dark, 
there is a median shadow. Hindwing dingy whitish with a feeble discal Iuna and a broad blackish marginal 
band containing a light spot. Described from Argentina. 
Th. olivofusa Dogn. Body white with a feebly greenish tint, palpi tinted with pink. Forewing yellowish- 
white, feebly suffused with greenish, with 2 olive transverse stripes, the anterior one extending from the costal 
margin about in the centre of the cell to the base of the hind-margin, the second subterminally from shortly 
before the apex to the third quarter of the hind-margin; the lines may grow very broad in the very variable 
species, particularly in the <j>, so that sometimes only a white band remains before the subterminal line. Hindwing 
white, in the distal half of the veins greenish, at the hind-margin red-brown. Expanse of wings: 26 mm. 
Tucuman. 
Th. riojana Giac. is smaller than olivofusa, more gracefully built; similarly variable, very light 
yellowish, chalky white. In the $ the hindwing is suffused with brownish-grey, with a hardly visible row of 
marginal dots. Expanse of wings: 22 to 23 mm. Likewise from Argentina (La Rioja). 
16. Genus: l£]io<lo<li|»sa Grt. 
In the structure similar to the preceding ones, but the more erect palpi are longer, and the thorax is 
clothed with hair intermixed with scales, d antennae plainly ciliated; anterior tibia inside with 2 thorns and 
a long bent horny sting at the end, outside with 4 small spines. 
Type: Rh. volupia Fisch. 
