16 



J. W. SCOTT MACFIE AND A. INGRAM. 



The head is small, rather broad and rounded (for a Umnotaenia) and dark in colour. 

 The antennae are small and stunted, without any visible hair-tuft or hair. The eyes 

 seem to be set further forward on the head than is the case in the majority of larvae. 

 The mid-frontal hairs are represented by single slender bristles, quite unlike the stout 

 spines found in typical species of Ummiaenia. The anterior thoracic hairs are 

 numerous but short, the mid and posterior thoracic plumes being formed of plumose 

 hairs, and the long hairs on the anterior abdominal segments are subplumose. There 

 are numerous stellate hairs on the sternum and venter, but the stellate hairs which 

 are so marked a feature upon the dorsum of the abdominal segments of the other two 



Fig. 13. Uranotaenia annulata, Theo. 



known larvae of this genus are not visible. The comb consists of an arched line of 

 scales, about 15-18 in number, the convexity of the arch being posterior ; the scales 

 are very regularly placed and are of about equal size. The chitinous plate on the 

 edge of which the comb scales are set is large, but feebly developed. The subsiphonal 

 plume is composed of plumose hairs, the siphonal and anal plumes being poorly 

 developed and apparently consisting of simple hairs. The siphon is about four times 

 as long as the diameter of its base ; the pecten, extending for about half the length 

 of the siphon, is formed of 18 to 20 blunt-ended and fringed scales, which are similar 

 to those of the comb, very regular and all of equal size ; beyond the pecten is a hair- 

 tuft of five hairs. The anal segment is longer than it is wide, with long dorsal hairs 



