BY R. J. TILLYARD. 703 



•dorsum. Meso- and metathorax large, wrinkled, raised high 

 above level of abdomen. Wing-cases laid parallel, their upper 

 ^sutures meeting at right-angles and slanting away downwards on 

 each side at an angle of 45° to the dorsal line; smooth, very dark 

 brown, with tiny black granular spots along the principal 

 nervures, and a very dark patch on nodus of forewings only. 

 Legs exceedingly wrinkled and furnished with several irregularly 

 placed blunt spines on femora and tibiae; surface of femora dis- 

 tinctly granulate, of tibiae finely so; tarsi three-jointed, the two 

 basal joints very short, the terminal one longer than the other 

 two together and ending in two sharp reddish claws. Lengths 

 of femur, tibia and tarsus respectively as follows : — fore-leg, 5, 5, 

 2 5 mm. ; middle-leg, 6, 5, 3 mm. ; hind-leg, 7, 6, 3*5 mm. 

 Abdomen elongate-oval, flattened, widening gradually from 

 1 to 5, then narrowing slightly to 9; 10, very much narrower. 

 Surface of all segments finely granulate except along sutures and 

 on a series of small oval depressions, not easily noticed, arranged 

 down each side of the dorsal surface. Each segment from 2 to 8 

 ends on each side in a remarkable protuberance of a peculiar 

 curved form somewhat like a fin; these increase in size up to 

 segment 8; in segments 2-5, these protuberances are distinctly 

 upcurved, in 6 less so, in 7 nearly flat, while in 8 they are quite 

 flat and broad. On 4-8 there are two small anal dorsal tubercles 

 close together, and on 4-7 a second pair placed one on each side, 

 farther from the dorsal line : 9 has flattened edges coming grace- 

 fully inwards anally, and then projecting out so as to enclose the 

 basal part of 10: in 9 the two anal dorsal tubercles have prac- 

 tically coalesced to form one larger one : 10 small and possessing 

 no tubercle. Terminal appendages five, of which the two outer 

 (lateral) ones are longest, 2-2 mm., narrow conical, converging, 

 pointed; the median one broader and shorter, 1*7 mm., subtri- 

 angular, tip truncate; the other two short, narrow subconical, 

 0"5 mm., lying on each side of median and above the inner 

 portion of the lateral ones. 



The discovery of this remarkable nymph should settle once 

 and for all the true position of the Petalia-gvon^ of genera in our 



