208 
HAPLOPACHA; BOMBYCOMORPHA. By Dr. C. Aubivillius . 
cinerea. 
bifascia. 
angle of the discal cell. Hereby the forms of this subfamily are distinctly separated and easily discernible from 
those of the other subfamilies. 
The Malacosomatinae have comparatively few representatives in the Old World, whereas in America 
they form the majority of the Lasiocampidae occurring there. 
The larvae are little known. They are elongate, cylindrical, and on all the joints similarly haired, or 
they only exhibit on each side of the first joint a long porrect hair-pencil. 
Table of Genera. 
I. Discal cell of forewing open. Veins 6 and 7 of forewing rise on a long fork; vein 8 from the very long 
fork of 9 and 10. Forewing above with lustrous, dark dots formed of erect scales. 
1. Haplopacha. 
TI. Discal cell of forewing closed. Vein 6 of forewing quite separate from the apex of the discal cell or on a 
very short fork with 7. Forewing above without small scaled tubercles. 
A. Vein 7 of forewing between vein 6 and the fork of 8 to 10 from the apex of the discal cell or from 
the short fork of 8 to 10. Small Bombyces with a white ground-colour of both wings. 
2. Bombycomorpha. 
B. Veins 7 and 8 of forewing forked from the apex of the discal cell, or vein 7 on a very short fork 
with vein 6. Veins 9 and 10 forked from the discal cell before its apex. 
oc. Veins 9 and 10 of forewing shorter than their fork. 3. Chrysopsyche. 
[3. Veins 9 and 10 of forewing much longer than their fork. 4. Rhaphipeza. 
1. Genus; I9aploj»a<*!ta Auriv. 
Palpi distinct, projecting a little beyond the hairing of the frons. Frons with a slight horny protuberance. 
Antenna of as far as the apex with two rows of pectinations. Head and thorax clad with long hair-like scales. 
Abdomen short, not projecting beyond the hindwing. Wings short with a bent distal margin and a feebly bent 
or almost straight costal margin. An entirely isolated, very characteristic genus forming to a certain degree 
a transition to the Chondrosteginae. Stages unknown. 
H. cinerea Auriv. (29 a) is grey; forewing above somewhat lighter grey with a broad median band 
being on both sides dentate and at the costal margin somewhat broader, and 11 scaled dots (one in 1 b near 
the base, one at the end of the discal cell, and 9 purely black ones before the margin). Hindwing above and 
both wings beneath brownish-grey without markings. Rhodesia. 
2. Genus: lSoml»ycomoi*]»8ia (Feld.) Auriv. 
Small lepidoptera recalling the species of Chondrostega by their size and shape of wings; fore wings 
whitish, scantily marked, hindwings uni-coloured white. On the forewing vein 4 rises shortly before the posterior 
angle of the discal cell, 6 quite separately from the apex of the cell, and 7 from the same place or from 
the short fork of 8 to 10. Veins 9 —10 are long, much longer than their fork, they are closely adjacent and 
terminate into the costal margin, or 9 into the apex. The discal cell of the hindwing is closed by a fine cross¬ 
vein. and from its posterior angle it despatches the veins 4 and 5 and from the apex the veins 6 and 7. Palpi 
short, not projecting beyond the hairing of the frons which is covered with long hair. Eyes bare. Antenna 
of $ as far as the apex with two rows of distally much shorter pectinations. The abdomen projects beyond 
the hindwing. $ without anal wool. Tarsi long and scantily haired. 
The eggs are in numbers fastened around branches as in Eriogaster and Malacosoma, and they are 
smooth without any particular sculpture. The larvae live gregariously in large webs. They are cylindrical 
and uniformly haired. The pupa rests in an elliptic web in which small particles of earth are intermixed as 
in Trichiura crataegi and Poecilocampa populi. The cocoons are often crowded together. The imagines have 
two generations a year, and fly in October and January. 
B. bifascia Walk. (= nupta Feld.) (29 a). White or whitish-grey; eyes margined with blackish- 
brown; antennae and tarsi yellowish; anterior tibiae above brown, below with long white hair; fore wing with 
two yellowish-brown broad almost straight transverse bands, one near the base and one a little beyond < 
the centre; a dark discal dot. Hindwing white without markings. Larva with pencils of long greyish-white 
hairs, and between them with shorter light yellow hairs; body grey, with white spots; two black dots on the 
head and a lateral one on each joint of the body; ventral legs red-brown. Pupa lustrous light red-brown. South 
Africa. 
