210 PERCY SLADEN TRUST EXPEDITION 



^$. Head white, eyes black, antennae pale greyish yellow, basal joint white. Thorax 

 yellow-ochreous, sides mostly shining milky white. Legs yellow ochreous, claws black. 

 Wings hyaline, veins yellow-ochreous, very hairy, especially in the apical part of the 

 wings. Preefurca curved at the base ; first submarginal cell two-thirds as long as second ; 

 second posterior cell half as long as third ; discal cell open, coalescent with the third 

 posterior cell ; great cross-vein at base of discal cell, in a line with the small cross- vein. 

 Halteres yellow-ochreous, the knob brownish. Abdomen yellow-ochreous. 



In the ? from Mahd the thorax is entirely yellow-ochreous, and the abdomen is largely 

 blackish (perhaps discoloured by food). 



Length of body 3 mm. 

 ,, wing 3'5 mm. 

 „ front leg 10 mm. 



,, middle leg 8 mm. 

 ,, hind leg 15 mm. 



Although this species shows all the principal characters of the genus, it has a very 

 different appearance and must belong to quite a different group from the last. It has 

 a remarkable external resemblance to a yellow Phlebotomus, even to the white patches on 

 the pleurae. 



Loc. Seychelles. Mah^ : near Morne Blanc, X. 1901, 1 ?. Silhouette: Mare aux 

 Cochons, IX. 1908, 1 $ and 1 ? in coitu. 



Genus Tasiocera Skuse, Proc. Linn. Soc. N. S. Wales, ser. 2, iv. 815 (1889). 



22. Tasiocera minutissima, sp. n. (Plate 10, fig. 14, wing; plate 11, fig. 12, $ 

 genitalia.) 



$. Minuta, fusca, perpilosa, antennis brevibus, flagelli articulis subsequalibus ; alis 

 hirtis, prsefurca in cellula submarginali aut prim4 aut secunda terminate. 



$. Head obscure, fuscous brownish ; antennae hardly as long as thorax, leather 

 densely clothed with long hair ; joints of scape much broader than those of flagellum, 

 second larger than first, nearly globose ; joints of flagellum nearly equal in length, 

 narrower towards the tip. Thorax brownish, somewhat shining, moderately covered with 

 long hair. Legs fuscous, with rather long appressed hairs. Wings fuscous-tinged, all the 

 veins except the cross-veins densely covered with very long hair. Neuration apparently 

 rather variable, but typically as follows : subcostal cross-vein absent ; first and second 

 submarginal cells almost equal in length, praefurca arising at \ the length of the wing, 

 ending in second submarginal cell, or sometimes apparently in first ; base of first sub- 

 mai'ginal cell in a line with marginal cross-vein (at least in a wing mounted in balsam), 

 a vein-stump extending from the junction towards the base of the wing ; discal cell open 

 (sometimes closed ?), coalescing with second posterior cell ; great cross- vein at base of 

 discal or second posterior cell, with it retracted some distance towards the base of the 

 wing. Halteres hairy, fuscous, the knob somewhat darker. Abdomen with a dense 

 covering of long dark hairs, dull fuscous, genitalia more brownish. 



