ALDEB-FLIES. 45 



siderable portion of this time it rests on the boulders with 

 its wings erect, and specimens may then easily be picked 

 up by hand. Whilst thus resting it is no doubt often 

 devoured by birds, and the insect's early extermination, 

 through this cause alone, would appear probable. 



As yet I have not observed the perfect May-fly in a 

 state of nature, having reared all the specimens at present 

 obtained from the sub-imago. 



Family VIII.—SIALID^— ALDER-FLIES. 



11 Four wings of moderate size, meeting in repose over 

 the back at an angle; the hinder of the two pairs slightly 

 the smaller ; the anal area small or nearly absent, not 

 plicate. Nervures moderately numerous, transverse veinlets 

 moderately numerous, forming irregularly disposed cells. 

 The metamorphosis is great; there is a quiescent pupa. 

 The larva has the mandibles formed for biting, armed with 

 strong teeth " (Sharp). 



Genus CHAULIODES, Latreille (1805). 



" Prothorax as large as the head. Three ocelli close together. Antennas 

 pectinated or serrated. Neuration moderate, the nervules slender. Joints 

 of the tarsi cylindrical. Caudal appendages of the male conical and simple. 



" Distribution. — Asia, Africa, America, Australia" (Hutton). 



CHAULIODES DIVERSUS. 



Hermes diversus, Walker, Cat. Neuroptera in Brit. 

 Mus., p. 205 (1852). H. dubitatus, Walker, I.e., p. 204. 

 Chauliodes diversus, McLachlan, Ann. Mag. Nat. Hist.,, 

 ser. 4, vol. 4, pp. 37 and 39. 



(Plate VII., fig. 1 3 , 2 ? , 3 larva, 4 pupa). 



This large and conspicuous insect has been found 

 abundantly in the North Island, and at Nelson in the 

 South Island. It is probably generally distributed 

 throughout New Zealand. 



The expansion of the wings of the male is about 2 inches, of the female 

 fully 3j inches. The head is considerably broader than the thorax, with 

 very prominent eyes, and three conspicuous ocelli on the crown. The thorax 

 and abdomen are slender in the male, but rather stout in the female. The 

 general coiour of the body of both sexes is dull reddish-brown, irregularly 

 clothed with numerous minute whitish hairs. The antenna? of the male are 

 rather longer than the body ; in the female they are considerably shorter. 

 The wings in both sexes are elliptical, very pale brown with numerous dusky 

 dots on the veins, especially near the costa. 



