LAMB— DIPTERA : LONCH^ID^, SAPROMYZIDiE, EPHYDRID^, ETC. 331 



Localities. Seychelles. Malie: Cascade Estate, about 800 ft., 1909; near Morne 

 Blanc, X. — XL 1908 ; swept from rank vegetation In marshes on coastal plain at Anse 

 Royale, I. 1909. 



Var. dentata, n. var. A pale variety (or sub-species) occurs in which the thoracic 

 black dorsal mark extends less far behind and appears like a central mark with two 

 backwardly directed side lobes (PL 16, fig. 4). The abdomen is wholly devoid of black 

 marks, the basal part being reddish yellow, the rest pale yellow. 



Localities. Seychelles. Mahe: Cascade Estate, about 800 ft., 1909; marshes on 

 coastal plain, Anse Royale, I. 1909. 



Oscininse. 



Gampsocera, Schiner. 



Gampsocera Schiner, Wien. Ent. Monatschr., vi. (1862), p. 431. 



A single specimen of an insect was obtained which seems best placed in this genus. 

 The specimen agrees with Schiner's generic characters with the exception of the shape 

 of the scutellum : Schiner's description says, " Riickenschild flach gewolbt, am Rande 

 beborstet, Schildchen verhiiltnissmassig klein." Becker (Archivum Zoologicum, Vol. i. 

 no. 10, p. 117) defines the genus and figures the head of G. scutellata Heeger; he describes 

 the scutellum as " halbkreisformig." The present specimen agrees with his figure as to 

 the shape of the head and antennoe, but the scutellum is elongate as sliown in PL 16, 

 fig. 5. In other respects the agreement with the published generic character is close. 



34. Gampsocera scutellata, n. sp. 



^. Head. The shape is very like Becker's figure {I.e. Plate III, fig. 68) but the 

 hairy eyes are not rounded at the lower inner edge, the margin being there angulated. 

 Frons black ; the triangle large, shining black, the base nearly filling the space between 

 the eyes ; it extends to the base of the antennae. The antennae have the third joint less 

 pointed than in Becker's figure [I.e. Plate III, fig. 69), being more nearly kidney-shaped : 

 the second and third joints are yellow. The black apical arista is flattened in section and 

 very densely pilose, its two joints being quite distinct, the last ends in a distinct though 

 fine terminal bristle. The proboscis and palpi of the single specimen are completely 

 retracted. 



Thorax (PL 16, fig. 5). Shining black on the dorsum and pleurae. The former is 

 finely punctate and clothed with delicate white hairs ; there are no dorsal bristles. The 

 scutellum has a blunt-pointed triangular outline (PL 16, fig. 5) and is strongly arched 

 and more coarsely punctate than the thorax. It is black with two strong divergent 

 terminal bristles : the dorsum and sides have small white bristly hairs. 



Wings immaculate, yellow at their insertion ; the venation is as figured by Becker 

 {I.e. Plate III, fig. 70), except that the second vein bends more sharply up to the costa 

 which it meets about midway between the ends of the first and third veins. 



Halters yellow. 



Legs entirely pale yellow. 



