BY R. .T. TILLYARD. 



\:v.\ 



herewith the figures given by Navas of the venation and append- 

 ages, for comparison with those of other genera and species of 

 the families figured in this paper (Text-fig. 4). It is to be hoped 

 that the discovery of further specimens of both sexes of either 

 this species or I', pertoides may soon settle the question of 

 whether one or two species are represented by the two known 

 specimens. 



In suggesting the vernacular name "Moth-Lacewings" for 



the insects of this family, I do so with a desire to emphasise not 

 only their superficial resemblance, in structure and habits, to 

 certain archaic moths, such as, for instance, the smaller and 

 duller Hepialid<n, but also because, being one of the very oldest 

 existing types of Planipennia, they do show actually a closer 

 morphological approach to the Lepidoptera than do most other 



W 3 W, 



Text-fig. 5, 

 Rhone fusca Newm, Thorax of male, lateral view, ( x 6). Api, pleurum 

 of first abdominal segment; asp, abdominal spiracle; At 1} tergum of 

 first abdominal segment; ex, coxa; epm, epimerum; eps, episternum; 

 Pn, pronotum; «p, thoracic spiracle; Tn, trochantin; »■, attachments of 

 wing. The suffixes 1-3 indicate the parts belonging to pro-, meso-, 

 and meta-thorax respectively. 



insects of their Order. Quite apart from the moth-like form of 

 the head and body, the greatly reduced labium with its long 

 three-jointed palpi, and the very typically Hepialid-like position 

 of rest and manner of flight, we can see, by a study of the 

 thoracic exoskeleton, how very close this ancient type really 

 comes to the Lepidoptera. Text-fig. 5 shows the thorax of 



