P. E. S. WHALLEY 



absence of the proboscis was noted. In the species of Chrysotypus the proboscis is 

 often reduced to two small lobes. In all species the maxillary palps, which are 

 minute, are never visible through the scale covering. In some species (e.g. C. 

 dawsoni) minute mandibular lobes are visible when the head is de-scaled. The 

 pilifers are present in some species (D. intermedia) but absent in others (C. dawsoni). 1 

 Labial palps are usually three-segmented but in Cecidothyris all the species have the 

 second and third segments fused to give a two-segmented labial palp. The palps 

 are normally densely covered with scales (Text-figs 1-3). 



The antennae of the African species of Thyrididae show less variation in shape 

 than in many other families of Lepidoptera. In the majority of species the antennae 

 are minutely ciliate, but ciliate, dentate and pectinate antennae also occur. Detailed 

 stereoscan electron microscope studies of the antennae are in progress, and prelimi- 

 nary results show various types of sense organs, some of which are shown in PI. 

 25, figs 131-133. In R. serraticomis there are two different lengths of pectinations 

 in the males (p. 94). The chaetosema is absent in all species and ocelli are usually 

 absent. In Striglina, ocelli occur in some species but these are mostly very small. 



Thorax. No detailed study of the sclerites of the thorax was made. In Dysodia 

 the patagia are greatly enlarged and give the species a characteristic appearance 



1 Subsequently some specimens have been found with pilifers present. It appears to be a variable 

 character within this species. 



Figs 1-3. Lateral views of heads. 1. Neobanisia fuliginea sp. n.; 2. Opula 

 perigrapha Hampson; 3. Mathoris magica Gaede. 



