74 [ f^eptem]>er, 



The characters of the new genus may thus be determined ai 

 follows : 



Anterior-wings lanceolate, posterior-wings oblong-quadrangular with pointei 

 projecting tip, the cilia very long. Antennae little more than two-thirds the lengtl 

 of the anterior-wings, filiform, the basal joint oblong, little broader than the shafi 

 with some diverging hairs at the base. Maxillary palpi and tongue wanting. Labia 

 palpi falciform, with pointed terminal joint, the middle joint flat, as long as th 

 head, beneath thin, above half as broad ns the eyes, the terminal joint one-third th 

 length of the second joint, of uniform breadth at the base, the tip pointed, botl 

 joints are rather rough in front, but smooth-scaled behind. 



Head rounded, rather flat, clothed with long closely-appressed scales, the fac^ 

 oblong, broader than the eyes. Eyes moderate, ocelli very distinct. Thorax twici 

 as broad as the head, flatly arched, smooth-scaled. Abdomen a third shorter thai 

 the posterior- wings, thin, with a short anal tuft (c?). Legs formed and spurred a 

 usual, of moderate length. 



Anterior-wings with 12 veins, the middle cell narrow, pointed, without distinc 

 hind margin, veins 2 and 3 remote from each at two-thirds of the inner margin c 

 the cell, 4, 5, 6, diverging from one point from the apex near the stalk of 7 and 

 which run to the costa, 9, 10, and 11 apart from each other, 12 short ; no supply 

 menlary cell. 



Posterior- wings with perceptible, though short, inner margin, a rounded ant 

 angle, and at vein 4 the rounded curved hind margin, in which below the lonij 

 projecting point is an incision. Cilia one-fourth longer than the breadth of the M'ing 



The posterior- wings have the inner-marginal veins very indistinct ; vein 2 ari& ' 

 at two-thirds, 3 at four-fifths of the inner margin, 4 and 5 from one point from tl 

 inner-marginal angle, the transverse vein tending backwards but soon ceasing, ai 

 the middle cell open, 6 wanting,* 7 is the continuation of the anterior margin of tl 

 middle cell, and runs very near the costa, ending in the apex of the wing, 8 

 very short. 



The costa and inner margin of the anterior-wings are parallel, and tolerab 

 straight, the cilia at the apex rounded. The ground-colour of the palpi, antenn 

 head, thorax, and anterior-wings is a greyish chalky-white, the latter sprinkled me 

 and more with dark grey scales towards the hind margin and apex, and even on t| 

 cilia ; these form no definite markings with the exception of a faint intersecting lii 

 in the middle of the rather yellowish cilia. 



Posterior-wings light grey, with yellowish cilia. Abdomen also light grey, 

 greyish-white, short anal tuft. 



The under-side is greyish- white, paler towards the apex of the wing, with 

 indications of the intersecting line in the cilia from the apex of the wing. 



The middle cell of the anterior-wings occupies about a third of the breadtl 

 the wings, and reaches to three-fourths of their length ; that of the posterior-i 

 is above half the breadth of the wings, and two-thirds of their length. 



The specimen, a male, was taken by Heer Kiuker, June 5th, ISij 

 at Noordwijk, probably on the edge of the dunes. 



* The posterior-wings have a fold at this place on both sides, so that it is imiDossible tc| 

 whether vein 6 is really present, or whence it arises. ' 



