208 MR. R. M'LACIILAN on NEW-ZEALAND TRIOHOPTERA, 



, apicul cellule extending to, and slightly into, the discoidal cell ; 

 second about .half the length of the first; third shorter than the 

 second ; fourth longer than the second, but shorter than the first j 

 fifth longer than the fourth : posterior wings pale-smoky subhyaline ; 

 fringes blackish, but becoming whitish cinereous towards the base of 

 the dorsal margin ; first apical fork short ; second longer, about half 

 the length of its footstalk ; third slightly longer than the first ; fifth 

 as long as the second. (Plate II. fig. 9.) 



JJe^s testaceous ; coa?^ fuscous ; anterior tind intermediate tibicB (uscous 

 externally, with a narrow median pale ring ; spurs reddish-testaceous. 

 ; ,.46rfome» fuscous, yellowish beneath, and with yellow appendices j in 

 the c? there are three ventral teeth, — one very small at the apex 

 of the segment before the antepenultimate, and a larger one at the 

 apex of the antepenultimate and penultimate segments ; in the $ 

 there is a tooth-like tubercle at the apex of the antepenultimate and 

 pemdtimate segments ; the <? has a broad, obtuse, and flattened up- 

 curved lobe proceeding from the margin of the last dorsal segment : 

 appendices of the <? very complicated ; app. sup. long and hairy, 

 slender at the base, dilated and notched at the apex ; app. inf. long 

 and short, obtuse, curved upwards, the apex directed slightly down- 

 wards, beset with short tooth-like spines on the inner side ; penis 

 directed abruptly downwards, very deeply divided at the apex. In 

 the $ the apex of the abdomen is obtuse, the dorsal and ventral 

 margins of the last segment forming an open pouch, in which are 

 indistinct obtuse appendices*. (Plate II. fig. 9a.) 



Christchurch, Canterbury (Fereday) ; 6 J , 2 $ . 



Hydrobiosis umbripennis, n. sp. 



Fusca : antennae flavae, fusco-annulatae ; ocelli magni, valde conspicui, 

 flavi : alse anticae brunnese, albido lanuginosse ; pterostigmate fusco ; 

 venis longitudinalibus nonnullis pallido striatis ; fimbria apicali fiavido- 

 punctata ; maris margine dorsali basin versus nigro-cristato : pedes 

 pallide testacei ; tibiis tarsisque anterioribus intus fuscescentibus, 

 pallido-annulatis : abdomen supra fuscum ; infra flavidum ; maris 

 dente ventrali uno. 



Long. corp. d 4'", $ 5""; exp. alar, d W", ? 12-13'". 



Head — antennee yellow, with indistinct fuscous annidations, basal joint 

 with whitish hairs in the c?»and testaceous in the $ ; vertex fuscous, 

 the raised posterior edge, and a rounded tubercle on each side within 

 the lateral ocelli, paler, more reddish ; a line of whitish hairs along 

 the middle, and blackish hairs on the sides, but the middle hairs are 

 sometimes testaceous in the $ ; ocelli very large and conspicuous, 



. * I believe I possess a Hpecies from Melbourne (New Holland) closely allied 

 to this ; but the examples are not in a state tliat will admit of a description being 

 drawn up from them. 



