428 PERCY SLADEN TRUST EXPEDITION 



veins on a darkened ground, black or blackish. The exterior edge of this dark band 

 anteriorly defines the outer limits of 6 of the usual 8 series of dark horrescent hair ; 

 its posterior fringe, talcose-glossed, is reinforced by linear black scales about ^ the length 

 of the long hairs of the fringe ; and in the disk, anterior to the 1st cubital vein, tlie dark 

 tint is somewhat lightened by an admixture of whitish hairs on the veins, so that from 

 some standpoints the colouring appears to be light blackish grey. From the costa to R^, 

 or just beyond, the dark band is skirted by a narrow abbreviated stripe of spreading 

 white hair, widened in the costal fringe. Apical remainder of the wing-veins clad with 

 old gold or golden brown hair, glossed with gold, and with a few black hairs at the nearer 

 parts of the radial sectors, and some of a dark colour that enter the costal fringe in the 

 neighbourhood of R" and of R\ Wing-fringe matching in colour the adjacent part of the 

 disk, but liable to shift from glossy yellowish to whitish, with a talcose gloss. 



Head and thorax light yellowish-testaceous, with pale flaxen pubescence ; a cluster 

 of minute narrow black scales on the meso-pleuron, and some on the prominent veins 

 beneath the wings at the roots. Abdomen blackish brown, with somewhat harsh and 

 partly erect dorsal hair, — part inclined over appressed elongate scales inserted towards 

 the bases of segments. Genitalia and their hair in $ dull light-hempen brown. Antennae 

 concolorous with the head ; when shifted about, some of the scales at the tip of the basal 

 joint become blackish, and the flagellum towards the extremity, like the palpi, assumes 

 a greyish or light brownish-grey tint. Legs glossy cream-coloured ; broadly fuscescent- 

 grey ; at the tip of the tibia, and narrowly at the apex of the 1st tarsal joint on the 

 exposed side in the hinder legs; and with the terminal joint black or black-brown. The 

 long spreading hair-like tibial bristles, and some hairs on some of the tarsal joints shift 

 with change of posture fiom flaxen to brownish and black. Wing 175 to 2 mm. long. 



Loc. Seychelles. Mah^ : near Morne Blanc, about 800 feet, 1 $. Mare aux 

 Cochons district, about 1500 feet, I. — II. 1909, 5$, 2$. Prep., Eaton, no. 61 a,h. 



The specimens from the Mare aux Cochons district were caught (2. II. 1909) 

 in a swampy place shaded by Eugenia-trees and great Pandanus Hornei, near a 

 mountain-stream. They were flying near partly dried up j)ools among dead Pandanus- 

 leaves (Scott). 



PsYCHODA Latr. (1796), et auct. ; restricted Eaton (1904). 



Type Psychoda cdternata Say. Out of 9 or 10 species sub manu, 3 have been 

 described : — Psychoda phalmioides Latr., P. alternata Say, and P. alhipennis Zett. — 

 Distribution : Tropical and Temperate regions : 2 occur in the Seychelles. 



4. Psychoda alternata, Say (1824). 



Psychoda sexpunctata, Curtis (1839). 



Loc. Seychelles. Mahe : Cascade Estate, about 800 feet, 11 examples (pinned). 

 Prep., Eaton, no. 70. 



A species widely dispersed : N. America, Europe, Africa N. and S., India, New 

 Guinea and Australia. 



