SOUTH AFRICAN BAGWOEMS. 



163 



Laeva, Full-grown. 



Length 18 mm. (male), 25 mm. (female). Width of head- 

 case 20 to 30 mm. in the full-grown male larva; in the female 

 it may reach a width of 40 mm. Clround colour of head 

 avellaneous (XL), of dorsal thoi-acic plates olive buif (XL), 

 of body pale drab grey (XLA*^!). Dorsal area and ventral 

 area of abdominal segments, also the thoracic intersegmental 

 membranes, drab (XL VI), markings on head, thoracic plates 

 and plates on 8th to 10th abdominal segments hair bi'own 

 (XL). Spiracles cinnamon buff (XXIX). 



The thoracic plates show very little pigmentation as com- 

 pared Avith the other Acanthopsyche larvae, and the specific 

 name alba is also borne out by the aspect of the caterpillar as 

 well as that of the adult. The longitvidiual pigmented 

 stripes, so prominent in A. junodi, are reduced to short lines 

 on the posterior half of the thoracic plates as shown in text- 

 fig. 8, c. The setse are placed in the position normal for this 

 family and have been discussed under A, junodi. The 

 intersegmental membranes are characterised by a series of 

 small pigmented areas arranged in transverse rows, while a 

 rudimentary spiracle is found between the 2nd and 3rd 

 thoracic segments. 



The larva is typically Psychid, the head has a radial 

 colour-pattern, the adfrontals are massive, the head setae are 



