LAMB— DIPTERA : LONCH^ID^, SAPROMYZID^, EPHYDRID^, ETC. 325 



Size (excluding antennae) about 1^ mm. 



Localities. Seychelles. Silhouette : low coconut-planted country near the coast, 

 Pointe liltienne, 17. IX. 1908. Mahd : marshes on coastal plain, Ansa aux Pins and Anse 

 Royale, I. 1909 ; near Morne Blanc, about 800 ft., X — XL 1908 ; Cascade Estate, about 

 1000 ft., 1908—9; Anonyme Island, I. 1909. 



Hydrellinae. 



Hydrellia, Robineau-Desvoidy. 



Hydrellia Robineau-Desvoidy, Essai sur les Myodaires, v. (1830), p. 790. 



A single species of this genus was found which Mr J. E. Collin informs me belongs to 

 the griseola group. 



27. Hydrellia varipes, n. sp. 



A black insect with variegated legs. 



Head. Frons, vertex and back of head black, rather shining, slightly brassy. 

 A bright silver lunule over the antennae. Face closely covered with shining brown-gold 

 pollination with four well-marked fine bristles bordering the eyes. Jowls small, grey as is 

 the lower back of the head, two bristles just below the back lower angle of the eye and 

 a few scattered ones behind it. Palpi yellow, antennae black with nine side rays and one 

 terminal. 



Thorax, shining black with greenish tone : two pairs of dorso-centrala, the front pair 

 very near the cross suture, continued forward by a few small bristles. Achrostical bristles 

 in two rows, fine. Scutellum as thorax, flattened on the disc, two terminal and two 

 basal bristles with two fine side hairs between. Pleurae and metanotum grey. 



Wings normal in venation with brown veins. 



Halters, bright yellow knobs with somewhat darkened stalks. 



Legs : front, coxae yellow but slightly darkened at the base in front ; trochanters 

 yellow; femora black with extreme tips (at each end) yellow ; metatarsus yellowish, other 

 tarsal joints black but just perceptibly spotted with yellow at the extreme distal tip. 

 Other legs as front but coxaj and trochanters slightly sufi'used and the hind metatarsi 

 brighter yellow. 



Abdomen ; black, less shining than thorax, bristly, the marginal bristles being 

 especially distinct ; segments of nearly equal length. 



Size about If mm. 



Localities. Seychelles. Mahe : marshes on coastal plain, Anse aux Pins and Anse 

 Royale, I. 1909 ; cultivated and marshy country near sea-level at Cascade, 20. II. 1909 ; 

 cultivated country about 1000 ft., XI — XII. 1908; near Morne Blanc, about 800 ft., 

 X— XL 1908. 



