316 PERCY SLADEN TRUST EXPEDITION 
Trypetide. 
Crratitis MacLeay, Zool. Journal, xvi. (1829), p. 482. 
15. Ceratitis capitata Wied., Anal. Entom. (1824), 55 (Trypeta). 
Localities. Seychelles: Mahé; Cascade Estate, and Mare aux Cochons district 
(1000 feet or over), 1908—9: Dennis Island, VIII. 1908: Praslm, a number of 
specimens from an introduced creeper (Passiflora fetida), 30. XI. 1908. Amirantes : 
Poivre Island, 10. X. 1905, ¢ and 2 i covrtu. 
Oxyna Robineau-Desvoidy, Myodaires, 755, i. (1830). 
16. Oxyna sororcula, Wied., Aussereur. Zweifl. Ins., ii. (1830), 509. 52. 
Described by Wollaston from Madeira as Ensina vacillans, Ins. Dipt. Mad., 
A.M.N.HL, i. (1858), 117. 
Localities. Seychelles. Mahé: Port Victoria, from grass in Botanic Gardens, XII. 
1908; Cascade Estate, ca. 800 feet, 1908—9; country above Port Glaud, XI. 1908; 
Mare aux Cochons district, 1000 feet or more, 1909. Silhouette: plateau of Mare 
aux Cochons, and coconut-planted country near coast (Pointe Etienne), IX. 1908. 
Acrp1a Robineau-Desvoidy, Myodaires, 720. 14 (1830). 
17. Acidia seychellensis, n. sp. (Fig. 10 and Plate 19, fig. 6). 

Fig. 10. Acidia seychellensis, n. sp. ~ 20. 
A single female specimen of this genus was collected ; generically it agrees well with 
the British species but the eyes occupy a little more of the side of the head. 
Head. Eyes with a very few almost invisible hairs. Top view :—frons slightly 
widening from vertex to forehead, chestnut brown, slightly shining, the short strips 
on which upper f. o. stand and the black ocellar area together with a small depressed 
triangle in front of it are quite shining. The duller part is very minutely shagreened 
and has scattered tiny hairs in front. Three pairs crossed front f. 0., the corresponding 
absolute eye-margins with a row of tiny hairs along them ; two pairs parallel but backward- 
bent upper f. 0. Long slightly conv. i, v. just at eye-angle on vertex; div. o. v. 
just on hind eye-margin; roughly forming a triangle with these is a small bristle 
behind the head: in this view the long post-orb. row can be seen running up to the 
