62 
Annals oe the Transvaal Museum. 
broad ; second joint 2 times first joint in length and a little thinner ; 
third joint over J of second joint, pointed and not hidden in the hairs ; 
in $ the second joint is 3 times length of first joint ; third joint nearly § of 
second joint : eyes almost rounded, as large as width of frons ; frons 
rounded and covered with short hairs ; antennae nearly | length of costa, 
curved, bipectinate, branches forming on under side nearly a straight 
line ; branches short, only 4 times thickness of shaft and ending in 
2 bristles ; thorax clothed with long woolly hair ; abdomen with two 
crests on basal segment and a crest on second and third segments, crests 
composed of rather long woolly hair ; legs moderately clothed with long 
hair ; fore tibia of with a much curved process, as long as tibia ; in $ the 
process is much thinner and nearly straight ; mid leg with 2 and hind 
leg with 4 long spurs. 
Fore wing sub -triangular ; costa and inner margin straight ; termen 
much rounded ; 16 simple at base ; 2 from § lower median ; 3 from just 
beyond § the distance 2 to 4 ; 4 from lower angle ; 5 from just above the 
angle ; discocellular angled beyond middle ; ceil about J of wing ; 6 from 
below upper angle ; stalk of 7, 8, 9, 10 from angle ; stalk of 7, 8 as long 
as f of 7 ; 9 from nearly | of 8 ; 10 from before J of 8 ; 11 from near 
upper angle ; 12 parallel to costa. 
Hind wing semicircular ; costa and inner margin straight ; termen 
much rounded ; apex much rounded ; tornus with a rounded lobe at from 
before 16 till 2 ; la short, straight ; 16 somewhat curved ; lc faintly 
represented ; 2 from f lower median ; 3 and 5 from lower angle ; 4 absent 
(Aurivillius and Hampson state that 5 is absent ; Meyrick takes 4 to be 
the absent vein, and judging from the position of the two other veins I 
think the latter is correct ; most probably 4 and 5 have united so as to 
form one vein only) ; discocellular rounded inwards ; cell less than \ of 
wing ; 6 and 7 on a stalk of J of 6 and from the upper angle ; 8 much 
curved near base, then anastomosing with the upper median at f, where 
upper median is much curved, then to costa and for a little distance 
parallel with it. 
This genus is most certainly allied to Euproctis , from which it has 
most probably developed. 
1. a. Hind wing white sub-alba. 
6. Hind wing yellow 2. 
2. a. Fore wing of with the space between antimedial and 
postmedial lines partly filled with dark scales ; hind 
wing cream colour (XVI) natalensis . 
6. Fore wing of the with the antimedial and postmedial 
lines represented only by some dark scales ; hind 
wings pale orange-yellow (III) hardenbergia. 
Species in South Africa : — 
Porthesia natalensis, nov. spec. (pi. Ill, 22, 23). 
cf. Head, palpi, antennae, tegulae and fore legs apricot yellow (IV) ; 
thorax above with sorghum brown (XXXIX) hairs ; abdomen with the 
dorsal crests and hairs of anal segment of apricot yellow hairs ; abdomen 
