SOUTH AFlilCAN BAGWORMS. 171 



aspect. Prothoracic spii-acle prominent, protected by a strong 

 ridge, running latero-anteriorly from the insertion of the legs. 

 Mesothorax broad dorsally, its anterior dorsal third deflexed, 

 its lateral aspect sparsely and finely setose. Metathorax with 

 a sharp median ridge, and laterally to this, a minute spine. 

 Dorsal and dorso-lateral aspect of thoracic segments and of 

 1st abdominal segment chitinised, shiny. Prothorax entirely 

 chitinised, but more strongly on its dorsal half. 



Thoracic segments bear free legs, coxas and femora short, 

 tibiae swollen in the middle, tarsi uni-jointed with two short, 

 stout claws {text-fig. 10, d). 



Behaviour of the Adults. — We have not bred the male 

 moths, and at present no information is available on the subject 

 of flight, copulation, length of life, etc. Mr. Piatt reports 

 that the males which emerged in confinement quickly battered 

 themselves. It appears, therefore that they fly soon after 

 emergence, and are strong flyers. 



As the type has been captured at light in Zululand, it is 

 probable that the emergence takes place at dusk and that the 

 male flight is either nocturnal or crepuscular. 



Number of Generations in a Season. — Judging from 

 the emergences of the moth, there must be a considerable irre- 

 gularity in the production of broods. The dates of emergence 

 of specimens bred by Mr. Piatt and the writer are as 

 follows : 



September 2nd, 1916, 1 male ; November 5th, 1 male ; 

 November 9th, 1 male, 1 female ; November 28th, 2 females ; 

 December 2nd, 1 male (E. E. Piatt, Durban) ; December 10th, 

 1 male (C. B. Hardenberg, New Hanover) ; January 10th, 1916 

 (type, collected by Janse, Zululand). 



If we had the records of only the first and the last date of 

 flight we should be tempted to consider this species as two- 

 brooded, since these dates correspond with those of other 

 moths which have two generations ; but the intermediate 

 dates show that there can be only one generation in a season. 

 The adults dated from September 2nd till December 10th 

 were all obtained from one lot of caterpillars collected on one 



