24S I October, 1895. 



Easily mistaken for P. gracilis in the field. Pubescence in $ enow-white on 

 the head and anteriorly on the thorax, impure yellowish-white just in front of the 

 wings, whitish-brown shifting, with change of posture, to darker posteriorly on the 

 notum, and whitish shifting to greyish-white on the dorsum of the abdomen. An- 

 tennffi and palpi as in P. palustris ; the hairs on the former, on change of posture, 

 light grey ; those on the latter grey. On the axillar nervure, exterior to the fold of 

 deflection, the bristling hairs are spaced subequally with blackish and white, before 

 the terminal outspreading hairs. The tint of the dark markings of the wing is 

 nearly evenly diffused. 



4. Pericoma compta, Etn. 



P. compta, ante, 2nd ser., vol. iv, p. 121 ; vol. v, pi. i, P. 4 and 

 4a (details). 



Very similar in style of coloi-ation to the preceding species of this Section ; but 

 the wing markings are of rather a cooler grey, and are uniform in depth of tint. 

 On the axillar nervure exterior to the fold of deflection, the bristling hairs are spaced 

 with white, grey, and white, before the terminal outspreading hairs ; and the outer 

 of the white spaces is rather the shorter. During life, the play of light on the 

 wing-membrane produces from certain standpoints a pearly lustre, that recalls to 

 mind the wings of certain Botyidce. The species is easily recognised in the field by 

 the dark base of the first joint in the tarsi, leaving foreign species out of account. 



Pubescence in J snow-white on the head and in front of the thorax, white at 

 the sides of the thorax and on the genitalia, and tinged with light yellowish-brown 

 on the remainder of the notum and dorsum ; the tips of the hairs between the 

 wings, and the roots of those on the costal callus within the fold of deflection, 

 change, when shifted about, to greyish-black. In ? the light yellowish-brown tint 

 extends to all of the whitish parts. Antennae as in P. palustris. 



Mr. G. Verrall has taken this species in Sussex. 



5. Pericoma extricata, Etn. 



P. extricata, ante, 2nd ser., vol. iv, p. 121 ; vol. v, pi. i, P. 5 and 

 5« (details). 



Likely to be released from the net through being mistaken for P. compta aged 

 and worn, owing to the dullness of its coloration. There is hardly any sexual 

 difference in colour. The pubescence is dingy, where in compta it is white, and the 

 tips of the hairs more readily take a grey or blackish tint when shifted about ; the 

 tint between the wings on the notum is also of a rather darker yellowish-brown, and 

 on the costa within the fold of deflection the roots of the fringe blacken more 

 extensively. Integument of the femora and tibite greyish, or, when dried, somewhat 

 piceous, instead of light yellowish. Scape of antenna blackish, like the flagellum ; 

 the scales and hairs greyish-white, or, when dried, light brownish. On the axillar 

 nervure, exterior to the fold of deflection, the bristling hairs are spaced with light 

 greyisli or dingy white, blackish or dark grey, and again with the lighter colour, 

 before the dark outspreading terminal hairs. The wing markings are nearly uniform 

 in depth of tint. 



