November, 1894.] 241 



This change in nomenclature is necessary, and under rather peculiar 

 circumstances. In 1856 Forster (Hym. Stnd.) used Olynx as a generic 

 term. According to his derivation (which was the same as mine) it 

 should have been Olinx. Possibly I might have been excused from 

 Altering my term had not Taschenberg (Hym. Deutschl.), in 1866, 

 given Forster's name its correct rendering {Olinx), in which he has 

 been followed by others. The term I now propose changes the 

 original as little as possible, and has practically the same meaning. 

 The ? of 0. Feredayi, McLach., remains unknown to me. 



NEUEOPTERA-PLANIPENNIA. 

 Fam. OSMFLID^. 

 Stenosmylus, McLach. 

 I instituted this genus in 1867 for the reception of Osmylus tenuis, 

 "Walker, and other Australian species. It was chiefly characterized by 

 the narrow wings, and (especially) by the bifid or deeply excised tarsal 

 plantulge. Subsequently, two New Zealand species {incisus, McLach., 

 and citrinus, McLach.), with the apical margin of the wings strongly 

 excised, were included, and I see no reason for altering their position ; 

 moreover, the Australian Osmylus pallidus, McLach., should be placed 

 in Stenosmylus, and it has excised wings. I have since received another 

 species from New Zealand (described below), in which the apical 

 margin is scarcely excised, and the wings broader than in the Australian 

 species, thus approaching some forms of Osmylus, therefore, species 

 with both forms of wings are represented both in New Zealand and 

 Australia. The latter genus has increased vastly of late in the number 

 of known species, and there is much diversity in the form of the wings 

 and in minute details of neural structure. The condition of the 

 plantulae remains the principal distinguishing character of Stenosmylus, 

 for in Osmylus they are truncate, or at the most only very slightly 

 excised. I have an undescribed Stenosmylus with excised wings 

 from Chili. 



Stenosmylus latiusculus, n. sp. 



Head above and pronotum dull yellowish. On the head the hinder part of the 

 vertex (behind the ocelli) is separated from the fore part by a transverse slightly 

 raised line, from which two slightly divergent longitudinal impressed lines descend 

 to the hinder margin ; ocelli large, but not prominent, approximate, their sockets 

 narrowly blackish ; eyes blackish ; antennae pale brown, the two basal joints and the 

 base of the 3rd joint yellow ; front fuscescent ; palpi yellow. Pronotum narrowly 

 black on its side margins, longer than broad, with a transverse sulcus on its posterior 

 third, the disc with small black tubercles whence black hairs arise, and there arc black 



