viridirosea. 
basitriens. 
simplaria. 
ferruginea. 
angulosa. 
rimosa. 
1020 LIBYSSA; NOTODONTA; LOPHODONTA; PHEOSIA. By Dr. M. Draudt. 
127. Genus: Ubyssa Dogn. 
Very similar to the preceding genus from which it differs in the tuftedly ciliated antennae and 
shorter palpi. Veins 3 and 4 of the hindwing arise from the same basis, separately in Astapa. Only 1 species. 
Type of genus: L. viridirosea Dogn. 
L. viridirosea Dogn. is a smaller species with light pink forewings, brownish at the base and the 
2 first thirds of the inner margin, light green submedianly, behind the cell and subapically, as well as on 
the fringe; a submarginal double row of black dots, the interior row being thicker, between the veins. Hind¬ 
wing blackish with a pink tinge, and a brown and white anal spot. Expanse of wings: 28 mm. French 
Guiana. 
128. Genus: Notodonta Ochs. 
This widely distributed genus (cf. Vol. II, p. 299) has also two representatives in North America. An¬ 
tennae of d shortly pectinated, of $ plain. Distinguished by the absence of the areole on the forewing, 
7—10 being forked together with 6 and arising from the end of the cell. The costal vein of the hindwing 
arises near the cell-end. No larvae known. 
Type of genus: N. dromedarius L. 
N. basitriens Wlcr. (154 h) is coloured and marked like the European trepida ; forewing ash-grey 
strewn with reddish-brown, with a large rusty brown basal spot, bordered by a double notched red-brown 
line, the dentate post median line is bordered with whitish outside and is continued on the light, distally 
smoky hindwing. Atlantic States. 
N. simplaria Graej (154 h). Eorewing ash-grey, blackish basally, with 2 dark dentate transverse lines 
bordered with a lighter colour on the averted sides, the cell-end streak surrounded with whitish; a sub- 
marginal row of small dark internerval spots. Hindwing whitish. From the Northern Atlantic -States. 
129. Genus: Xjopliodoiita Pack. 
Structured exactly like Notodonta, but both sexes with plain antennae. Two North-American species. 
Type of genus; L. ferruginea Pack. 
L. ferruginea Pack. (154 h). Eorewing red-brown at the base and in the median area, the rest very 
dark ash-grey, whitish in the anterior upper half of the median area with blackish scales, two rusty red 
notched transverse lines bordered with whitish on the averted sides, and a whitish undulate line. Hindwing dingy 
white, narrowly smoky at the margin, with a grey postdiscal band. Canada to Colorado. — The stout larva is 
green with double yellowish-white dorsal lines, some small yellow lateral spots and a short red below yellow 
lateral line from the head to the first two segments. It lives on Betula, especially B. papyrifera. 
L. angulosa Abb. & Sm. is marked like ferruginea, only the postmedian line is less undulate, but 
the colouring is much lighter ash-grey, and the median area is of the same colour, not red-brown, only the 
transverse lines are red-brown, whitish on the averted sides, bordered with white on both sides at the costal 
margin. Hindwing as in ferruginea. — The larva is more slender than that of ferruginea, green with a 
double white dorsal line, with 3 lateral yellow dots on each segment, and a yellow lateral stripe bordered 
with red-brown above; it lives on oak and pupates in the soil. Massachusetts to Georgia and Florida. 
130. Genus: Plieosia Hbn. 
♦ Likewise very closely allied to the preceding genera and separated by pectinated antennae in both 
sexes. Only the 4 lowest subcostal branches of the forewing are stalked, vein 6 arises from the cell-end. (Cf. 
also Vol. II, p. 297). 
Type of genus: P. tremula Clerk from Europe. 
P. rimosa Pack. ( = californica Stretch) (154 h) is the exact image of the European tremula, only 
the forewing is apparently a bit broader on an average, and the brownish marginal shadow somewhat 
broader and darker. — The larva occurs also in the same two colourings, green or brown, but it differs con¬ 
stantly in a long pointed Sphingid horn on the penultimate segment. It lives on poplars and willows. Distri¬ 
buted from British Columbia to Maine and New York. The name dimidiata PL.- Schdff. which was formerly given 
to the species refers to a tropical insect: Bhuda dimidiata (cf. p. 986) and is due to a mistake. 
