204 [September, 



Pericoma of the 3rcl Sectiou, referable perhaps to the present Sub- 

 section. 



Pericoma meridionalis, Etn., ante, 2nd ser., vol. v, 194 (1894), 

 from South and South-East Africa, although it may be related to 

 Subsection D of this Section, maybe mentioned here with Ps. superha, 

 because neither of them can be classed precisely until the positions 

 of the endings of the ranks of bristling hair on their wings and the 

 critical features of their (^ antennae are known. 



Subsection B of the 3ed Section of Pericoma, 

 Refer supra, p. 128. ' 



AiEnities with Subsection A, and in some degree with Subsection 

 E. The persistent air-nipples of the male, and the extent to which 

 the wing-nervures in this sex are squamose beneath, together with 

 the peculiar tint of the whitish gloss diffused over parts of the tarsi, 

 point also to relationship with the 5th Section of the genus. 



Wing-markings slightly affected by change of posture ; the i 

 whitish or light coloured hairs, losing their gloss, become dull and ] 

 evanescent in turning about. From the radius to the postical nervure ' 

 the rows of bristling hair terminate with the dark median transverse 

 fascia, and on the axillar nervure with a dark subterminal spot ; the 

 narrow white or light haired fascia and spot that skirt these externally 

 are formed exclusively of hairs spreading and ascending outwards ; 

 the dark hairs of the apical region lie closer to the membrane. In P. 

 notahilis ^ , beneath the region of bristling hair, every wing-nervure 

 for a considerable distance from the wing roots is densely squamate 

 with stipate, linear scales ; near the outer limits of the region these 

 are succeeded by flattened hairs, or sessile acuminate scales, and these 

 in their turn by ordinary hair : in the ^ of the Algerian species No. 

 VIII the scales are more limited in extent. In the other sex flattened ■ 

 hair commences near the basal cells on some of the nervures, and near 

 the fold of deflection on others. 



IS. Pericoma notabilis, Etn. 



P. Xcanescens (Hal. MS.), Walk., Ins. Brit. Dipt., iii, 258 (1856). 

 — P. notahilis, Etn., ante, 2nd ser., vol. iv, 126, and vol. v, pi. ii, P. 18 

 (details). 



$. Adorned for erotic display, partly by colouration and partly by gloss. 

 Pubescence of the head, together with the scales of the palpi and of the scape of the 

 antennae, deep black, " shot " with brownish-black ; hair of the flagellura light, 

 warm sepia-grey. Thoracic integument black ; pubescence anteriorly white on the 

 notum, elsewhere whitey-brown " shot " with impure whitish, but browner between 



