STTEINGOMYIA. 461 



De Meijere places the genus in the RHAMPHIDIINI, but it seems 

 to me much more nearly related to the Gonomyia group, with 

 Mongoma. Lechria, and the closer allies of Gonomyia. 



Table of Species. 



Wings with small pale grey infuscations on 



the cross-veins and elsewhere ceylonica, Edw., p. 461. 



Wings quite clear. 



Brown species, wings pale grey obscura, Brim., p. 463. 



Yellowish species, wings pale yellow .... Jlava, Brun., p. 464. 



333. Styringomyia ceylonica, Edw. (PI. IX, fig. 3; PI. XI, 

 fig. 18.) 



Styrinyomyia ceylonica, Edwards, Ann. Mag. Nat. Hist. (8) viii, 

 p. 62 (July 1911) ; Brunetti, llec. Ind. Mus" vi, p. 298 (1911). 



c? $ . Head and the rather short blunt proboscis, yellowish ; the 

 wide t'rons bearing several long strong bristly hairs. Eyes black, 

 almost contiguous below the head, for a short space. Antenn* 

 yellowish, with somewhat sparse, moderately long hairs ; scape 

 brown, 1st joint elongate, 2nd wider at tip ; flagellum of fourteen 

 oval joints, narrowing in size towards tip. Palpi yellowish, with 

 some hairs, 4-jointed, each of about the same length, the 1st rather 

 the shortest, the 4th slightly the longest, with a blackish tip which 

 is sometimes bent at a right angle ; 2nd broadest and widening 

 towards tip, which is black. Thorax : neck moderately long, with 

 strong stiff black hairs on upperside. Thorax brownish on upper 

 half, yellowish below, with two irregular rows of short bristly hairs, 

 separated by a father wide median space. Some stiff hairs on the 

 sides, a long one on each posterior callus and two in each humeral 

 region. Scutelluui and inetanotum brown, bare. Abdomen about 

 three times as long as the thorax, linear, consisting of the usual 

 short basal segment, and six other longer ones of about equal length, 

 moderately pubescent. Variable in colour ; in male mainly dirty 

 yellow with posterior borders of segments a little blackish, or with 

 an indistinct dorsal stripe ; in female dark brown. Genital organs 

 of male prominent and highly complicated, consisting of two large 

 basal segments (wider than the terminal abdominal segment), the 

 2nd pointed posteriorly above ; this latter segment bearing a pair 

 of large subchitinous claspers of which the upper arm is bluntly 

 conical, terminating in a black sharp elongated point ; the lower 

 arm being attenuated, elongated, nearly transparent, apparently 

 flexible and terminating in a very long black filamentous bristle ; 

 below this upper pair of large claspers is a second, much smaller 

 pair, the upper arm of each being bifid and stout, the lower arm 

 longer, comparatively thin, and ending in a small expansion 

 bearing four blunt strong teeth, there being two small black 



