sub fascia. 
imitans. 
rectilineata. 
24 2 PACHYPASA. By Dr. C. Aurivillius. 
The marking of the forewing is generally more abundant than in the species of Taragama. but it consists 
of the same elements, i. e. two transverse lines extending behind the apex of the short discal cell, and a 
submarginal line which is sometimes indistinct, coherent, not scalariform; the transverse lines, however, are 
often composed of 2 to 4 separate lines being sometimes differently coloured. The discal dot at the end of the 
discal cell is absent in all the species known to me except the $ of P. marshalli. In all the species the underside 
of the head, the palpi, chest, and ventrum are much darker than the upperside of the head and the dorsum, 
varying from dark red-brown to blackish-brown. — The larva has large magnificent spots on the dorsum of 
the joints 2 and 3, short bristles on the dorsum, a denser group of bristles on the dorsum of the 11th segment, 
and long bright-coloured hairs on the sides of the body and the lateral tubercles. The pupa rests in a frequently 
thin silky web. 
Of many species unfortunately only one sex is known, for which reason the relationship of these species is uncertain. 
In several species, however, where both the sexes are known, they agree so exactly with each other that their homogeneous¬ 
ness cannot be doubted; in other species the <$<$ differ so much from the $$ in their size, shape of the wings, colouring, 
and marking, that their homogeneousness could not be presumed, if it had not been ascertained by breeding. For the 
species exhibiting very long and narrow forewings in the Weymbe established (1892) a new genus ( Pachyna). But as the 
2 $ hardly differ from the 2$ of the genuine Pachypasa, I can regard the forms of Pachyna as a group of species at most. 
Table of groups of species. 
A. r£. Fore wing long, narrow and pointed; its distal margin much longer than the anal margin; transverse 
lines very slanting, parallel with the margin, even or almost even, not notched, feebly undulate at most, 
rarely in the <$ notched. Hindwing short, often only half the length of the forewing and small; its distal 
margin dentate or at least in the middle (at the end of the veins 3 and 4) more prominent, rarely uniformly 
rounded off, in which case, however, the hindwing is almost oviform with an entirely straight costal margin. 
- $. The distal transverse line of the forewing is almost straight, very slanting, single and distally bordered 
with light, or double filled with light. Distal margin of forewing behind the apex somewhat emarginated 
or quite straight. In one species the distal transverse line of the forewing is indistinct, but it is provided 
with a large black discal dot. First group of species (= Pachyna Weyrner ; Andraphisia Kirby). 
B. A- Forewing shorter and broader; its distal margin not or but little longer than its anal margin; transverse 
lines notched or undulate, rarely almost even, but then not very slanting. Hindwing of the usual shape 
and with a uniformly rounded distal margin; the latter is entire or undulately margined, not angular. - 
$. The distal transverse line of the forewing is generally curved, notched, or undulate, rarely straight, but 
then slightly slanting. Second group of species. 
First Group of Species. 
The differences between this group and the following are still somewhat uncertain, because of many species only 
one sex is known. 
P. subfascia Walk, (q = lomia Drc., trapezina Weym. ; ? = nasmythi Ehrm.) (33 c). q. Forewing 
very long and pointed, at the distal margin at the ends of the veins dentate; above brownish-yellow, the proxi¬ 
mal transverse line double, very indistinct; the distal one consists of three dark, almost even lines beginning 
at the costal margin near the apex, extending parallel with the distal margin and with each other, and 
ending at the hind-margin between the middle and the anal angle; the submarginal line is blackish, extending 
close in front of the margin and being distinctly thickened in the areas 1 b, 2, 4, and 5. Hindwing almost qua¬ 
drangular, at the costal margin straight and entire, between the apex and vein 2 also straight, but at the ends 
of the veins finely dentate, at vein 2 long-dentate, and then almost straightly cut off as far as the anal angle; 
they are on both sides dark brown with a blackish sub marginal band. Forewing beneath yellowish-brown with 
two thick straight black submarginal bands. The much larger $ has a brownish-yellow ground-colour and a 
distinctly prominent single or indistinctly double distal transverse band of the forewing, being almost straight 
and extending from the costal margin to the anal margin near the base. Hindwing above before the distal 
margin with a very broad blackish transverse band. Thoracal dorsum with a dark longitudinal line. The larva 
lives on various trees such as Persea gratissima, Poinciana regia, and Eucalyptus; it has not been described 
accurately, but it seems to correspond closely with the other exactly described larvae of this genus. Ashanti 
to the Congo District. 
P. imitans Auriv. (33 d). A- Very similar to the <$ of subfascia, but much darker and somewhat larger. 
The fore wing at the costal margin, in the discal cell and in the basal portions of the areas 7 to 11 almost black 
with lighter veins; the other marking is to be seen from the figure. Hindwing above blackish; its distal margin 
forms a distinct angle at vein 2. $ unknown. Cameroon. 
P. rectilineata Auriv. A unknown. As the $ (40 b) resembles the $ of P. subfascia in the marking, 
I place it here. From P. subfascia it differs in the fawn-coloured ground-colour of both wings, in the shorter 
