230 Transactions. — Zoology. 



Family HEMEEOBIID^. 



The lace-winged flies have the head vertical, with long 

 setaceous antennae inserted between the eyes, and indistinct 

 ocelli. The wings are large, equal, densely reticulated, and 

 without any anal area. The larvae are terrestrial, the pupa 

 enclosed in a cocoon. 



Artificial Key to the Genera. 



Fore wings much dilated at the base . . . . . . Drepanepteryx. 



Fore wings narrowed at the base. 



No recurrent nervule . . . . . . . . Micromus. 



A recurrent nervule . . . . . . . . Stenosmylus. 



Genus Stenosmylus, McLachlan (1867). 



Prothorax elongated, subcylindrical. Wings long and 

 narrow, rounded or acute at the apex, subfalcate with the 

 apical margin excised in the New Zealand species. Subcostal 

 nervules numerous, those in the disk very numerous. 



Distribution. — Australia and New Zealand. 



Stenosraylus incisus. 



Osmylus (?) incisus, McLachlan, Journ. of Entomology, vol. 2, 

 p. 112, pi. 6, fig. 1 (1863).* Stenosmylus incisus, McLach- 

 lan, Ent. Mo. Mag., vol. 6, p. 195: Hudson, Man. Ent. 

 of N.Z., p. 101, pi. 14, fig. 2; Trans. N.Z. Inst., xxvi., 

 p. 105. 



Lurid, pubescent ; antennae yellow, slightly hairy ; eyes 

 lurid ; abdomen fuscous ; legs yellow, femora and tibiae with 

 a black spot at the knees, and another in the middle ; apical 

 joints of the tarsi black. Anterior wings narrow at the base, 

 apical margin excised, subhyaline, sometimes tinged with 

 brownish, clouded and irrorated with greyish fuscous ; three 

 large irregular-shaped blotches on the inner margin, and 

 a somewhat lunate one in the apex, fuscous ; costa spotted 

 with fuscous ; subcostal nervure and one in the middle of the 

 wing yellow, all the others fuscous, dotted with white. Pos- 

 terior wings marked in a similar manner, but less distinctly, 

 and the apical margins very slightly excised. Length of the 

 body, 17 mm. ; expanse of the wings, 55 mm. 



Locality. — Auckland and Otago. 



Stenosmylus citrinus. 



Stenosmylus citrinus, McLachlan, Ann. Mag. Nat. Hist., ser. 



4, vol. 12, p. 38 (1873) ; Trans. N.Z. Inst., vol. 6, App., 



p. xcvi. : Hudson, Trans. N.Z. Inst., vol. xxv., p. 105. 



Citron-yellow, obscured on the face ; above blackish. 



Thorax black on each side. Anterior and intermediate tibiae 



and posterior femora dark at each end and in the middle. 



