404 Professor Williston on the 



Two specimens. St. Vincent. Sea-level. This species 

 does not fully agi-ee with the characters o£ Ilythea in the 

 structure of the face, but the differences are not sufficient 

 to establish a new genus, which would otherwise be 

 required. 



DROSOPHILID^. 



Stegana. 



Meigen, Syst. Beschr., vi., 79, 1830. 



Front uniformly reddish or yellowish ; legs yellow . tarsalis, n. sp. 



Front with a broad, black hour-glass- shaped stripe ; legs for the 



most part blackish /lortc, n. sp. 



1. Stegana tarsalis, n. sp. (PI. XIII., figs. 149, front leg 

 of 6 ', 149a, middle tarsus of 6 ; 1496, palpus ; 

 149c, wing.) 



$ . Front at the anterior end about one-fourth of the width of 

 the head, at the vertex about one-third ; reddish-yellow, shining. 

 AntenuiB yellow, the third joint on the distal half or two-thirds 

 black ; about three times as long as wide, gradually tapering ; 

 arista loug-plumose. Face, cheeks and occiput, except at the upper 

 part, light-yellow ; palpi yellow, the tip brownish. Mesonotum 

 and scutellum brownish-red, shining ; scutellum flattened, with a 

 sharp border; pleurae Avith a horizontal, deep brown or black striiDe, 

 above which the colour is more like that of the mesonotum, below 

 which the colour is light-yellow. Abdomen elongate ovate, 

 brownish- black in colour. Legs light-yellow, all the femora 

 brownish near the extremity ; second, third, and fourth joints of 

 the front tarsi much dilated transversely and deep black in colour ; 

 middle and hind tarsi short and strong, compressed ; hind tibiae 

 dilated ; front femora with some bristles at the outer part. Wings 

 deep brown anteriorly, becoming less strong posteriorly ; second 

 vein nearly parallel with costa for a large part of its length ; third 

 strongly convex anteriorly; first posterior cell very narrowly open; 

 ultimate section of the fourth vein not twice the length of the 

 penultimate section. Length 3 mm. 



? . Third joint of the antennae a little larger ; front tarsi not 

 dilated and wholly yellow. 



So far as I am able to learn from the literature at my 

 command, but two species of this genus have been 

 hitherto made known, S. curvipennis, Fallen, and S. coleo- 



