328 PERCY SLADEN TRUST EXPEDITION 
Blane and Pilot, 1908 ; Mare aux Cochons district, over 1000 feet, 1909. Throughout 
the damp endemic mountain-forests. 
25. Drosophila grossipalpis, n. sp. (Fig. 15 and Plate 19, fig. 13). 
? Head (Plate 19, fig. 13) :—very much like last species in all essentials of 
bristles and structure ; frons all bright orange-yellow, finely rugose longitudinally for 
the proximal two-thirds: the ocelli red with a grey area inside. Face and orbits 
the same as frons; back of head rather darker. The antennz are also yellow-orange. 
Palpi orange, very stout, flattened in vertical plane. Tongue orange. 
Thorax. AJl rather dull orange, cheetotaxy as last species. Pleura rather lighter 
orange including the humeri: a brown ill-bounded spot below the sternopleural bristles. 
Scutellum, etc., coloured as thorax, the same in shape as the last species. 
Wings as Fig. 15, blackened on costa. Halters orange. Legs all yellow-orange. 

Fig. 15. Drosophila grossipalpis, n. sp. x 20. 
Abdomen. Ist segment orange, 2nd all black (except just at front margin in 
centre) extending well over sides; 3rd all orange with darker spot on centre line 
near distal margin and a much smaller brown spot near the proximal margin; 4th, 
mid line yellow-orange with similar central spots as the 3rd, then entirely black 
well over the sides, then orange and finally (on belly side) black; 5th orange with 
two small oval black side spots; 6th orange. The whole is covered with black discal 
bristles and long marginal bristles. 
The central spots on 3rd and 4th segments are often almost absent or very 
small. 
There are three imperfect specimens of what may be the male of this species: it 
agrees in all respects with the females described above, but the abdomen is entirely 
black, the narrow margins being a little paler: the specimens are in no way silvery 
or sericeous. 
Size as last species. 
Localities. Seychelles. Silhouette: near Mont Pot-d-eau, ca. 1500 feet; Mare 
aux Cochons, highest forest, ca. 2000 feet. Mahé: near sea-level, Long Island, VII. 
1908; also throughout the endemic mountain-forests (Cascade Estate ; Morne Seychellois, 
over 1500 feet; Mare aux Cochons district, over 1000 feet). Félicité: from drier 
type of forest near sea-level, XII. 1908. Praslin: XI. 1908, one of the three ¢. 
