Annals of the Transvaal Museum 
215 
Genus STENOSTAURA. 
(Pl. V, fig. 1 7; PL IX, figs. 1-4.) 
Stenostaura Hmpsn. Trans. Zool. Soc. xix. p. 119, Pl. IV, fig. 45 (1909). 
Type impedita Wlk. 
<$, $. Proboscis absent; palpi minute, porrect, three jointed; all joints of 
equal length and covered with rather long spreading scales and hairs; eyes 
large, rounded, naked; antennae bipectinated for over half, in $ the outer 
branches are three times shaft, inner branches two times shaft; in $ outer 
branches two times, inner branches once; beyond the pectinations the shaft 
is serrate and ciliate in both sexes; pectinations ciliated; basal joint of shaft 
with a tuft of hairs and scales; fore tibia with a rather short pointed process; 
tibiae and femora of all legs covered with long hairs, tarsi with scales; mid and 
hind tibiae with terminal spurs only, inner spur shorter than outer spur. Fore 
wing narrow; costa nearly straight; apex rounded; termen obliquely rounded; 
tornus rounded; inner margin nearly straight; 1 b indistinctly forked; 2 from 
beyond f rd lower median ; 3 and 4 from lower angle or shortly stalked ; 5 from 
above middle of discocellulars, which are oblique; 6 stalked with 7, 8, 9, 10 
for nearly ^rd of 6; 7 from stalk at beyond middle of 8; 9 from 8 at half the 
remainder part of 8 ; 10 from about half way 6 and 7 ; 1 1 from beyond f rd upper 
median; 12 parallel to costa. Hind wing sub-triangular; costa nearly straight; 
apex well rounded; termen oblique, rounded and somewhat lobed between 
2 and 5 ; tornus rounded ; inner margin nearly straight ; 1 a and 1 b nearly 
straight; 2 from frd lower median; 3 and 4 on a stalk of nearly half of 2; 5 
almost absent (only somewhat visible in wing preparation) ; 6 and 7 on a stalk 
of over ^rd of 6 ; 8 anastomosing with upper median for nearly half of cell, then 
parallel to costa and somewhat curved towards apex. 
The figure given by Sir George Hampson is not quite correct; in the fore 
wing, 3 and 4 are not shown from upper angle, 10 is given from before 7; 
pectinations of antennae are much too far towards the tip; in the description 
nothing is said about the faintness of vein 5, though it is shown in the figure. 
Only one species is known in this genus. 
Stenostaura Impedita. 
(Pl. V, fig. 17; Pl. IX, figs. 1-4.) 
Cossus impeditus Wlk. Cat. xxxn. p. 583 (1865). 
Stenostaura impedita Hmpsn. Trans. Zool. Soc. xix. p. 120, Pl. IV, fig. 45. 
Why this species was placed by Walker in the Cossidae is a mystery to me ; 
even without looking at the venation, it is clearly a Notodontid. The terminal 
line shown in Hampson’s figure is wrong according to my specimens; it should 
be represented by black terminal broad spots on the veins only. 
I have no doubt that my specimens belong here ; the description of the genus 
and the figure of the species make this a certainty, though there is some varia- 
tion in several of my specimens. In the $s the transverse lines are more 
diffused and one of my £s from Sawmills shows a very marked white clouding 
before the sub-terminal line. The hind wings of the £s are, as a rule, not pure 
white, but suffused with fuscous. 
This species is recorded from the Cape and from Mokia (S. E. Ruwenzori). 
I have it from Pretoria (Jan., Oct., Nov.) ; Barberton (Jan., Dec.); Waterval 
onder (Nov.) ; Three Sisters (March) ; Warmberg (Nov., Dec.) (all in the Trans- 
vaal); and from Southern Rhodesia (Sawmills, in Febr.). 
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