Insects of New Zealand. 37 



wings, and the pterostigma is larger and surmounts fully two 

 cellules ; fifteen postcubital nervules in the anterior wings. 



Notwithstanding the great similarity I must, for the present, 

 consider this insect specifically distinct from T. zealandica. 

 Only one male has been examined, and that rather immature, 

 the red markings on the head and thorax not being fully de- 

 veloped and more or less yellowish, and the pterostigma dusky 

 yellow. 



Planipennia. 



Sialidae. 



Genus Chauliodes, Latreille. 



18. Chauliodes diversus, Walker. 



Hermes diversus, Walk. Brit. Mus. Cat. Neuropt. pt. ii. p. 205. H. du- 

 bitatus, Walk. op. cit. p. 204 * (cf. M'Lachlan, Ann. & Mag. Nat. Hist. 

 July 1869, pp.37 & 39). 



This insect varies much in size. Of five individuals in my 

 collection the smallest (male) has an expanse of wings of only 

 25'", the largest (female) expands to 41'". The structure of 

 the antennas is the same in both sexes. 



Myrmeleontidae. 



Genus Myrmeleon, Linnd, Hagen. 



19. Myrmeleon acutus. Walker. 

 Myrmeleon acutus, Walk. Brit. Mus. Cat. Neuropt. pt. ii. p. 377.* 

 Appears to be the sole representative in New Zealand of this 

 extensive family. The hind wings of the male possess a 

 "pelote" or knob at the extreme base of the inner margin, as 

 in many other species. 



OsmylidaB. 



Genus Stenosmylus, M'Lachlan. 



The New-Zealand species might be transferred to a new 

 genus on account of the subfalcate wings and excised apical 

 margin ; but the Australian S. pallidas is in some respects 

 intermediate between them and the typical species j hence 

 their retention in this genus will answer every purpose, at any 

 rate for the present. 



20. Stenosmylus incisus, M'Lachlan. 



Osmylus incisus, M'Laehl, Journ. of Entom. vol. ii. p. 112, pi. vi. fig. 1 * 

 (cf. M'Lachl. Entom. Monthly Mag. vol. vi. p. 195). 



