EDWARDS— PIPTERA, TIPULID^ 207 



terminating in two spines, as in S. crassicosta. The upper lobes bear very complicated 

 comb-like appendages on their ventral side. Beneath all is a ventral plate (operculum), 

 which in this species is about as long as the upper lobes (excluding the terminal append- 

 ages) ; in S. crassicosta it is distinctly shorter. The operculum is trilobed, the lateral 

 lobes shorter and smaller than the median and much more strongly chitinised (the $ 

 operculum in S. crassicosta is simple, not trilobed). The ? operculum has the sides almost 

 parallel, the end slightly emarginate ; that of S. crassicosta has the sides converging and 

 the apical emargination rather more evident. The $ genitalia in Styringomyia seem to 

 be almost as complicated as those of the male ; I shall not attempt to describe them 

 in detail here. 



Length of body $ 7"5 mm. ? 5'5 mm. 

 ,, wing $ 5 "3 mm. $ 4"2 mm. 



,, front leg cf 10 mm. 



,, middle leg $ 8 mm. 

 ,, hind leg ^ 9 mm. 



Loc. Seychelles. Mahe : high forest of Morne Blanc and Pilot, X.— XI. 1908, 

 10 ^, 2 ?. 



18. Styringomyia annulipes Enderlein. (Plate 11, fig. 9, outline of? operculum.) 

 Pycnocrepis annulipes Enderlein, Zool. Jahrb., Syst., xxxii. 65 (1912). 

 Ochracea, thorace obscure fusco-bilineato, alis hyalinis, nigro-punctatis, pedibus obscure 

 4-annulatis ; antennis ex toto luteis. 



^?. Very much like S. mahensis, but less yellow, and inclined to greyish ochreous. 

 AntenncB all yellowish, second joint not darkened. Thorax brownish ochreous above, with 

 two darker brown rather indistinct longitudinal streaks, the median space between these 

 is paler ochreous. Legs with the darker rings in the same position as in S. mahensis, but 

 greyish and almost confined to the upper surface ; hardly perceptible on the hind legs. 

 Last joint of tarsi blackish. Wings hyaline, spots as in S. mahensis, but smaller and less 

 pronounced. Abdomen rather lighter than in the pi^eceding species, lower lobe of $ 

 genitalia almost as long as upper. Li one $ (probably because not discoloured) the 

 abdomen is coloured as in $. The genitalia, in both sexes, are almost exactly like those 

 of S. mahensis, the only difference that I can see being that in >S'. annulipes the 

 $ operculum is less deeply trilobed ; this may perhaps be due to a difference in mounting. 

 Notwithstanding the close resemblance in structural characters between the two 

 species, I consider that they are well distinguished both by coloration and by the slightly 

 different relative length of the wings. 



The writer's determination of this species was confirmed by Dr Enderlein, who kindly 

 compared a specimen with his type. 



Length of body $ 6'5 mm. $ 5"2 mm. 

 „ wing $ 47 mm. ? 4"5 mm. 



Loc. Seychelles. Silhouette : plateau of Mare aux Cochons, 6 ^, 3 ?. Mahe : Mare 

 aux Cochons, 1 $. Dennis Island, 2 $. Also Madagascar. 



SECOND SERIES— ZOOLOGY, VOL. XV. 27 



