168 Transactions. — Zoology. 



Hab. Streams about Dunedin, &c. ; on stones. Extremely 

 common. The eggs found in jelly-like patches on stones in 

 the streams are probably those of this insect. 



Subimago $ (in alcohol). Plate XV., figs. '2a-d. 



Wings dark sepia-grey ; posterior margins ciliolate ; neu- 

 ration black ; broad yellow median band on thorax, widening 

 into an oblong patch posteriorly ; setee warm sepia-grey, with 

 dark joinings. The subimago stands on all three pairs of 

 legs, with wings erect. The moult into the imago stage takes 

 place twenty-four hours or more after emergence from the 

 nymph. 



Imago 3- (in alcohol). Plate XVI., figs. ^a-m. 



Thorax piceous ; eyes bi-lobed, upper lobes light -red; 

 abdomen dusky brown edged with black, lighter median line, 

 and pairs of yellowish spots on segments 3-6; forceps luteous ; 

 setse warm grey, joinings black ; fore femur reddish-brown ; 

 hinder legs fulvous ; tarsi greyish. Wings vitreous, neuration 

 pitch-black. In the fore wing a yellow spot at the base of 

 the costa ; subcosta and radius luteous. Marginal and sub- 

 marginal areas slight luteous tinge. In the marginal area 

 seven cross-veinlets before the bulla and fifteen after it. The 

 insect stands on its two hinder pairs of legs. 



Imago J (in alcohol). 



Similar. About seven cross-veinlets before the bulla in 

 the marginal area of the fore wing, and about sixteen behind 

 it. Length of body, 3 10mm., 2 9 mm. ; length of wing, 

 S- 11mm., 5 10mm.; length of setae, $• 16mm., 2 13 mm. 



Atalophlebia nodularis, Etn. Plate XVII., figs. 4a-Z. 

 Nymph J (living). 



Dull brown, with legs and edges of abdominal segments 

 luteous ; dark-brown spots at the extremities and middle of 

 the femora ; wing-covers piceous. The abdominal segments 

 have distinct lateral flanges, the posterior angles of which 

 are, in segments 6, 7, and 8, produced into teeth; the fifth 

 segment is the widest. Length of body, 10 mm.; length of 

 setae, 4 mm. 



Hab. Streams near Dunedin, &c. ; generally found on soft 

 mud at the bottom. 



Not nearly so common as the last species. 



Subimago $ (in alcohol). 



Wings sepia-grey ; nervures pitch-black, the colour diffused 

 round the cross-veinlets. The bulla surrounded by a dark 

 spot, and another midway towards the tip. The subimago 

 stands on all its legs. The moult to the imago takes place 

 twenty-four hours or more after emergence from the nymph. 



