678 DESCRIPTION OP A LUMINOUS DIPTEROUS INSECT, 



in a somewhat bent line on the front. Palpi prominent, incurved, 

 cylindrical, four-jointed ; first joint very small, the following of 

 almost equal length, the fourth the longest. Antennae setaceous, 

 pubescent, in the ^ as long as, in the $ shorter than the body, 

 2- 4- 15-jointed ; the joints of the scapus cyathiform ; the flagellar 

 joints cylindrical, the terminal one very small, almost gemmiform. 

 Thorax small, oval, highly arched ; scutellum small, roundish ; 

 metathorax acclivous. Halteres large. Abdomen very long, 

 slender ; in ^ linear, subcylindrical, 8-segmented, without the anal 

 joint ; in 9 laterally compressed, 9-segmented, the last segment 

 small. Legs long and slender; tibiae with very short, weak spurs ; 

 the fore tibiae with a single range of spines on the inner side, and 

 the hind pair with one range on the inner, and two ranges of shorter 

 and weaker spines on the outer side. Wings large, microscopically 

 pubescent, as long as, or somewhat longer than the abdomen, with 

 obtusely-cuneiformly narrowed base ; incumbent in repose. Costal 

 vein uniting with the tip of the third longitudinal vein at, or 

 somewhat beyond the apex of the wing ; auxiliary vein complete, 

 joining the costa, united to the first longitudinal vein by the sub- 

 costal cross-vein ; third longitudinal vein with an anterior branch 

 (which is sometimes wanting), the branch short, almost vertical, 

 ending in the tip of the first longitudinal vein or in the costa ; 

 small cross- vein short, situated about midway between the origin 

 of the third longitudinal vein and the inner end of the second 

 posterior cell ; fourth longitudinal vein starting from the base of 

 the fifth longitudinal vein ; fork of the fifth longitudinal vein 

 united at its base to the fourth longitudinal vein by a short cross- 

 vein ; sixth longitudinal vein perfect. 



BOLITOPHILA LUMINOSA, sp.n. 



Q. — Length of antennae '090 inch ... 2*27 millimetres. 



Expanse of wings 0-250 x 0-070 ... 6-34 x 1-77 



Sizeofbody 0-380x0-040 .. 9-64xl-01 



Antennae very slender, as long as the head and thorax combined ; 

 joints of the scapus yellow, slightly tinged with brownish; flagellar 



