172 LIEUT.-COL. J. M. FAWCETT ON THE 



I have already figured the larva of H. smilax in Trans. Zool. Soc. vol. xv. pi. xlix. 

 fig. 6, from the form prevalent in Maritzburg. The larva is extremely variable, as may 

 be seen by a reference to the above-quoted paper, and the form now described is that 

 prevalent in Durban and the coast-belt of Natal. It differs from the Maritzburg form 

 in structure as follows : — (1) The body is much shorter and thicker ; (2) each somite 

 bears six tubercles of some considerable length (as compared with the Maritzburg 

 form), each bearing a tuft of five or six short hairs or spines, whereas in the latter 

 form the tubercles are very small and short, the tuft of hairs is much thicker, and each 

 tuft has four or five long hairs in addition, which are absent in the Durban form. The 

 plan of coloration is the same in both forms, but the hues are darker and more intense 

 in the Durban form. 



It is remarkable that the Durban form is almost identical in structure with the larva 

 of Copaxa flavinata, while the Maritzburg form agrees in structure with the larva of 

 the allied species H. delegorguei. A reference to the figures in the Plates will demon- 

 strate the similarity ; in the case of C. flavinata, however, the resemblance ends here, 

 as it effects its transformation underground, whereas the larvae of H. smilax and 

 H. delegorguei spin cocoons, the present species spinning its cocoon on the trunks of 

 trees covered with lichen and other mosses and leaves. 



The moth is not very common in Durban, where the larva feeds on guava (Psidium); 

 but I met with a good many examples of it in Maritzburg, where the larva feeds on 

 oak and Jasminum pubigerum (Natural Order Oleaceae). 



I think the similarity of the plan of coloration of the form figured here to that 

 figured in my former paper will sufficiently demonstrate that I was right in describing 

 that larva as one of the forms of the larva of II. smilax. 



Henucha delegorguei (Boisduval). (Plate VI. tig. 36, larva.) 

 Bombyx delegorguei Boisduval; Delegoigue, Voy. Air. Austr. ii. p. 601 (1847). 



Larva. Head black ; body, ground-colour pale ochraceous, each somite with six 

 paired small tubercles, subdorsally, laterally, and spiracularly rather darker than the 

 ground-colour, and each bearing five or six short, black, stinging hairs or spines, and 

 also a tuft of longer, pale yellow, silky hairs, which also grow irregularly over the body. 

 A dark fuscous subspiracular line ; spiracles black, with some black spots round them ; 

 legs and claspers reddish. 



Feeds on Microglossa mespilifolia (Bth.), Natural Order Composite, and is a day 

 feeder, and only a few are found on the same plant. AVhen full-fed it spins a cocoon 

 with its hairs on the stem of the food-plant. 



The moth seems fairly common in the Durban district, but I did not meet with it at 

 Maritzburg. 



