234 REVISION OF THE FAMILY EUSTUENIIDAE (ORDER PERLlAKIA), 



There is eousideralilc variation in details of tlie vonaticm, such as the number 

 of costal veinlets, the number of branches of Rs and Cui in forewing, and the 

 condition of the space between Ks aiid M in liotli wings; this latter space is 

 usually free fiom cross-veins in its basal half, but occa-sionally luis one or more 

 present there. The tracheation of the larval wing of this species is shown in 

 Text-fig. 1. The eerci and anal appendages of the male are shown in Text-fig. 4. 

 It should be noted that the short basal joints of the cerci, in this sex, carry, on 

 the inner side, sets of from one to three short strong bristles, and, on the outer 

 side, longer and slenderer hairs. The superior ajjpendages and penis are up- 



Text-fig. 4. — Sienopei/a prasina (Newman), (^ . Anal appendages of male, ventral 

 view (x 20). c, cercus ; ia, inferior appendage; />, penis; sa, superior 

 appendage. 



curved, but much shorter than in the Enstheniinae ; the former are broad and 

 slightly widened at the apex, and carry ba.«ally on the inner side a very distinct 

 process with a rounded tip; the penis is somewhat shorter than tlie a])pendages, 

 its apex more pointed. 



An interesting variety of tliis species occurs occasionally, in which the green 

 colour is entirely rephu-ed by yellow. The forewings, in the specimens which 1 

 have seen, are generally somewliat shorter than in typical specimens, but I can 

 find no other morphological differences. 



T y p e in British Museum Collection. 



Hah. — The whole of New Zealand, in the neighbourhood of fast running 

 streams. 



Stenopert.a austrai.is, n.sp. (Plate x%, Fig. 10.) 



(?, expanse 54 mm. Head dark grey, marked with brown on epicranium; 

 eyes black; antennae 11 mm. long, dark brown, basal .I'oint much enlarged, second 

 joint very short, slightly wider than third, which is rather long and cylindrical; 

 mouth-|iarts and underside of head bright orange brown, palps dull grey-brown. 



