( 23 ) 



? pale smoky grey, darker towards base and inner margin, with tliree waved 

 parallel dark grey lines beyond middle ; underside of both wings pale grey. 



Expanse of wings : cJ, ~4 mm. ; ? , 35 mm. 



Near to (>. sohria (Wlk.) from Natal, and ohsoleta (King) from Nubia and 

 Upper Egypt. 



S S'S, 2 ??, Nakheila, R. Atbara, Febrnary 4tli— 0th ; 1 i, Merawi, 

 N. Sudan, March 12th; 1 S, Shcrcik, N. Sudan, January I'.itli, 19n4. 



Hi. Beralade pura spec. nov. (PI. IV. fig. 13 cJ). 



Fori'irhig : white; the costal edge finely ochraceons ; fringe white, faintly 

 ghissy : a faint trace of a pale brown oblique line from the direction of apex to 

 before middle of inner margin. 



Ilimhriiiij : white. 



Underside white; the veins and marginal line slightly ochraceons. 



Head, thorax, and abdomen white; palpi dull yellow, externally fnscons ; legs 

 white, the fore-knees fuscous ; all the tarsi yellow with black rings ; antennae 

 ochraceons. 



Eximnse of wings : 40 mm. 



1 (J, Shereik, N. Sudan, January 10th, 1004. 



The single specimen came to light. An acetylene lamp with a " sheet," similar 

 to that used in the Fens of Clambridgeshire, was employed. 



IT. Cossus henleyi spec. nov. (PI. IV. fig. 14 $). 



Forririiu/ : dark grey, with a rufous tinge at middle of wing in the snbmedian 

 interval ; costal area with numerous short black streaks, some of which are 

 l}roduced across wing as dark lines ; one before middle, a second jnst beyond it, 

 the two ajiproximated below the median ; one at two-thirds to near anal angle, 

 and a fourth before hiudmargin, ending above anal angle and ramifying towards 

 margin ; fringe iron-grey. 



Iliiiihciiig : much paler grey, towards apex whitish, with dark grey rijipjing 

 between the veins ; fringe grey. 



Underside pale dull cinereous; costal streaks of forewing short and thick; 

 lines only visible towards hindniai'gin ; liindwinj,' like foi'ewiiiij- in tint, the costa 

 tliickly dusted with blacjcish. 



Head, thorax, and abdomen grey; tips of slioulders and patagia, and basal 

 segments of dorsnni black; antennae black ; legs dark and light grey. 



Expanse of wings : 40 mm. 



9 c?c?, Nakheila, R. Atbara, February Tth, Sth, 1904. 



All the specimens came ti> light, settling at once on the sheet. This species 

 is named in honour of the Hon. Francis R. Henley. 



IS. Ilema heuleyi spec. nov. (PI. IV. fig. 31?). 



ForeiciiKj : cinereous, speckled with blackish ; at about one-third is a broad 

 curved fascia constricted in middle, where the pale basal area projects into it; the 

 costal, inner, and hindmargins are also sprinkled with black scales, and possibly in 

 quite fresh examples the whole area is thus sprinkled ; at two-thirds there are 

 traces of an oblique line marked liy black dashes on veins ; before the marginal 



