BY R. ,t. TILLYARt). 



293 



term the thyridial hiatus. It is more conspicuous in tlie t'oie- 

 wing tiian in the hind. In forewing, near base, tliere are cioss- 

 veins between Cu._, and lA, between \A and 2A, and (close up 

 to base) between 2A and 3A; 3A is branched. In hindwing, 

 there is a cross-vein from lA to 2 A, just below caiJ) 2A is 

 branched, 3 A simple. 



Genotype, Nanuochorista dipterdiaes, n.sp. ^Hobart and 

 Mount Wellington, Tasmania). 



]. Nannochorista dip'ieroides, n.sp. 

 (Plate xvi., fig.l). 



(J. Total le'}icfth -i, ahdonnen 2*7, forewiny 6-5, hiitdtviiiy 5-7, 

 expanse 13 mm. 



Head medium brown, 

 eyes very dark brown, vertex 

 and ocelli black. Antenncp. 

 3 ram., scape, pedicel, and 

 base of third joint brown- 

 ish, rest black. Mouth-parts 

 brownish, of the form de- 

 scribed above (under char- 

 acters of the family). Text-tig.'2. 



Thorax black, a tinge ^'^^ci of female in Nannochorista.— a, N. 

 of reddish-brown near wing- dipteraides; h, X. Iwlostiyma; c, X. 

 , r 1 • eboraca; ( x 46). 



bases. Legs pale semi-trans- 

 parent brownish, slightly darkened distally on each segment; 

 tarsi darker. 



Abdomen: 1-8 black, with a slight tinge of reddish-brown 

 at extreme base; all segments furnished with short pale hairs. 

 Segs. 9-10 and claspers rich brown, with hairs of same colour. 



$. Total length 6-7'5, abdomen 4-5-5-5, foretving 7-8, hindwing 

 6-7, expajise 14'5-17mm.* Bead and thorax as in male, except 

 that the lal>rum and epipharynx are slightly longer. Abdomen 

 shining black; cerci shaped as in Text-fig. 2, a 



* In all the species, the variation in size of the females is very great, 

 necessitating the giving of hmiting measurements. On the other hand, 

 the males vary very httle in size, so that an average measurement will 

 sufl&ce. 



C. 



