202 C. B. HARDENBERG. 



this, but apparently the male is content with adding an extra 

 layer of silk to the inside of the bag. Also, in the male bags 

 (from which the moths had emerged), we find the last larval 

 skin pushed out at the lower end of the bag ; in the female 

 this was found inside, pushed to the very top. 



8. Semimanatha fumosa Ja^ise} PI. XIII, fig. 17. 



This species was found by the writer in December, 1916, 

 on an oak (Quercus p e dun cu lata) in Pietermaritzburg. 

 The bags (text-fig. 19, i, k) bore a close resemblance to those 

 of Manatha aethiops, and they were at first considered to 

 be the half-grown stages of this species. However, the larvas 

 proved to be practically full-grown, and the moths, upon 

 emerging, were sent to Mr. Janse for determination, and were 

 described by him as anew species — Semimanatha fumosa, 

 sub-fam. Psychinte. The resemblance between the bag of 

 this species and that of Manatha aethiops is very striking, 

 and much greater than that between those of M. tethiops 

 and M. subhyalina. A comparison of the larvge of these 

 two species would be very interesting. Unfortunately, up to 

 the present no adequate larval material of these two species 

 has been obtained which would allow of minute comparison, 

 and the differences are as yet entirely based upon the 

 characters of the adults. 



Food -plants. — A careful search was made for the larva 

 of S. fumosa on the wattle and native trees, but up to this 

 time it has not been found, so that the normal food-plant is 

 unknown. It has been found only on the oak (Quercus 

 pedunculata) in the town of Pietermaritzburg, and, while 

 the trees are plentiful, the bagworms could be found on only 

 one or tvvo stunted trees. 



Larva, Full-grown. — Length of larva 10 mm., width 

 of head-case 1'5 mm. Ground colour of head pale orange 

 yellow (III), that of thoracic plates and anal plate pale yellow 

 orange (III), of body-segments cartridge buff (XXX), seti- 

 ferous plates on body-segments pale olive buff (XL). 

 ' Described in Janse's paper preceding this, j). 139. 



