378 Mr. E. M'Lachlan on a species of the 



above, and with an appearance as of a large raised tubercle in the 

 middle of the cavity. Legs yellow, with numerous short, but 

 strong, black hairs; coxae internally, femora internally at the base, 

 and externally at apex, tibiae externally at apex, tarsal joints at 

 apex, marked with brown ; claws piceous, yellowish at base. 



Anterior wings long-oval, very obtuse, costal edge straight; 

 vitreous and very shining, but the costal margin to below the 

 radius is broadly smoky grey; pterostigma scarcely indicated; 

 neuration black, set with rather long divaricate black hau-s ; sub- 

 costa and radius consiDicuously yellow ; costal nervules simple ; 

 cellules mostly quadrangular. Posterior wings very narrow, not 

 dilated near the tips, greyish, but the inner margin transparent ; 

 subcosta and radius yellow ;'■= only very faint indications of the 

 usual darker fasciations ; marginal veins blackish ; the veins and 

 the margins with short black hau-s. 



Length of body {$),!! mm. Expanse of anterior wings, 56 mm. 

 Length of an anterior wing, 26 mm. ; greatest breadth ol same, 

 ^\ mm. Length of a posterior wmg, 58 mm. ; breadth of same, 

 I5 mm. 



Hah. Coquimbo (J. J. Walker). 



In fades this insect quite agrees with several Old 

 World forms, in which the wings are transparent but 

 have the costal margin tinted. 



Ceoce, n. g. 



I propose this generic term for a group of species, 

 usually of small size, characterised by the front being 

 very strongly produced into a slender beak, by short 

 antennae (which are usually somewhat thickened towards 

 the apex), by transparent anterior wings with very open 

 neuration and usually with a strongly-defined ptero- 

 stigmatic mark, and especially by long setaceous 

 posterior wings, strongly ciliated, in which even the 

 rudiments of neuration are scarcely to be traced. 



Taking N.fiUpermis, Westwood, as the type of this 

 genus, I think the following should also be placed 



* I do not remember to have seen any description of the neuration 

 of- the hind wings of Nemopteridce, other than a vague statement 

 that there are two longitudinal veins. In reality there are three 

 such veins, viz., the subcosta and radius, which become confluent a 

 little before the apex, as in the anterior, and a thii'dvein equivalent 

 to one of the cubiti. The marginal veinlcts are shnple (straight or 

 oblique), but in those species in which these wings are very strongly 

 dilated before the apex, such as " N. dilatata,'' "'N. Huttii," &c., 

 they are complex in the dilated portion. 



