CHONDROSTEGA. By M. Gaede. 
109 
7. Family: Lasiocampidae. 
1. Genus: Clioiicirostega Led. 
A relatively large number of new species of this interesting group are described. Whether they will 
all be retained in the future, or whether they will be merged, as in the Genus Somabrachys, cannot yet be said. 
Ch. poweili Oberth. (9 b, 10 a). Compared by the author as regards the colour with pastrana Led. ($ 
10 a, $ Vol. 2, p. 149, pi. 24 a). Base and outer margin darker, so that occasionally the ground colour of the 
forewings is only retained as an outer band. On hindwings an outer band can be indicated on upperside, which 
can be almost as heavily excurved in the centre as on underside of vandalicia Mill. (Vol. 2, p. 149, pi. 24 a). 
The underside of the 2 specimens figured by Oberthur appears to be so different, that one could almost be¬ 
lieve they were 2 species. The species seems to be very variable. In one specimen an outer band of dark spots, 
which is interrupted anteriorly, is apparent on underside of hindwings. In another specimen there are 3 spots 
nearer the base, one at cell'end, one below same and another at costa. Finally there is a specimen in the 
Pungeler collection with a continuous dark central line, which is heavily incurved at costa. ^ 34 3fe> mm. 
Algeria. The $ has long and thin antennae, whilst in constantina they are shorter and thicker. 
Ch. tingitana Powell (9 b) was first known in the $$. Head and thorax with yellow-brown hairs which 
are less dense than in constantina (10 a) and poweili (9 b). Also the dark brown hairs on abdomen are less dense. 
Antennae are not so long as in poweili , but differing also from those of constantina and vandalicia (Vol. 2, 
p. 149, pi. 24 a) by their fineness and sharper points, the pectinations being less pointed. The process (tooth) 
on thorax after the 1st pair of legs is little developed. The lateral parts of the projection on frons are somewhat 
more rounded off than in constantina. Tangiers. Later on Oberthur has illustrated the $ without giving 
any particular description.. On upperside it resembles a red-brown poweili. Forewings are uniformly dark from 
base to outer line, then somewhat paler and glossy. Hindwings are paler and shades of a central band are 
discernible. On underside the outer band of forewings is slightly more prominent. On hindwings it is much 
more distinct and of the same shape as shown in our illustration of poweili. 
Ch. maghrebica Joannis. Commencing again here with the $, we find the following differences: the 
projection on the frons has sharper ridges at the sides. The hairs on head and thorax are longer and yellower 
than in constantina and poweili. Hairs of abdomen are also somewhat longer and the brown colouration is 
less reddish, it is preferably yellow anteriorly and yellow-brown posteriorly. In the head and thorax are 
black-brown, abdomen is yellow-grey with brown belts. Forewings black-brown, the outer band whitish, fairly 
wide, parallel with the outer margin and only slightly distant from same. Fringes spotted. Hindwings grey- 
brown with a dark shade from centre of inner margin to the cell. Outer margin narrowly brownish. Underside 
of forewings buff-brown with pale veins. The light outer band further removed from margin with narrow 
black-brown edge inwardly. Here and on hindwings it is incurved below costa, then excurved and continuing 
parallel to the margin. On hindwings veins are also light and there is a pale streak in the cell. The line on 
hindwing is similar in formation to that of vandalicia (Vol. 2, p. 149, pi. 24 a) but the line there is dark and 
not light as stated in Vol. 2, p. 149 and the area to base is sometimes as brown as the line itself. S 27—34 mm. 
Marakesh. 
Ch. zanoni Trti. from Cyrenaica seems to be very similar to aurivillii Pnglr. (9 b) from Jerusalem 
(Vol. 2, p. 150). As aurivillii has not yet been illustrated, we are giving an illustration from the type, zanoni 
varies on upperside of forewings by paler base, the outer paler band appears to run straighter to costa. Fringes 
in both species are checked. The brown ground colour of hindwings is just as dark as that of forewings, so 
that the pale base, light median band and margin contrast sharply. Fringes are as the ground colour, i. e. dark, 
but this is not discernible from the original illustration. In aurivillii (9 b) they are as light as the margin. 
poweili. 
tingitana. 
magbre- 
bica. 
zanoni. 
