EDWARDS: Nematocerous Diptera from Java. 181 



Subfamily Limnobiinae. 



Orimarga karnyi sp. n. 



Head dark brown, somewhat shining, with very little grey dusting. Front 

 distinctly broader than in O, similis, at its narrowest part quite two-thirds the width 

 of one eye, scarcely any trace of a tubercle above the antennae. Proboscis brown, 

 a little shorter than the head. Scape of antennae dark brown; flagellum and 

 palpi missing. Thorax shining dark brown, with scarcely a trace of grey dusting, 

 middle area of scutum and a smaller patch on each side in front of the scutellum 

 yellowish. Pleurae uniformly dark brown. Abdomen light brown, the last segment 

 and the ovipositor rather conspicuously darker. Ovipositor normal, short. Legs with 

 the coxae ochreous-brown, trochanters dark brown, femora dark brown, with the 

 extreme tips pale, tibiae and tarsi dark brown. Wings with a faint but quite 

 uniform brownish tinge, the extreme base white, veins dark brown. Subcostal cross 

 vein placed beyond the tip of Sc in cell Sc. Sc ending above mid-length of Rs and 

 above Cuj^. Tip of Ri straight, more than twice as long as r. Rs and R4+5 both 

 gently curved at the base. Cell M3 rather more widened apically than in O. similis, 

 its petiole about two=thirds as long as M3 Haltères stouter than in O. s/m/7/s, brownish, 

 base of stem and tip of knob lighter. 



Length of body 4.5 mm., wing 4 mm. 



Buitenzorg, 22. ii. 1921 (Dr. H.H. Karny). 



Type 9 in the British Museum. 



This resembles O. borneensis^ Brun., in many respects, differing in 

 the longer tip of Rj, position of subcostal cross-vein, darker and more 

 shining thorax, etc. From the Indian O. peregrina, Brun., it also differs 

 in being much darker. The two species described by me (O. scotti from 

 the Seychelles and O. fryerl from Aldabra I.) both differ from the Javan 

 species in having the subcostal cross-vein placed well before the tip of Sc, 

 and in having much more numerous macrotrichia on vein R2 + 3 (about 

 30— 40 instead of 10—15). 



Orimarga similis, sp. n. 



Head blackish, rather strongly dusted with grey. Front rather narrow, at its 

 narrowest part scarcely two-thirds the width of one eye, produced into a small 

 tubercle just above the base of the antennae, Proboscis yellowish-brown, rather over 

 half as long as the head. Scape of antennae blackish; flagellum and palpi missing. 

 Thorax brown dorsally, some-what shining and with very little grey dusting, 

 margin of mesonotum obscurely lighter. Pleurae brownish ochreous, an ill-defined 

 but rather broad slightly darker stripe across the middle, lower part of mesosternum also 

 slightly darker, Abdomen rather light brown, posterior margins of sternites lighter. 

 Ovipositor short, normal in structure. Legs with the coxae and trochanters light 

 ochreous-brown (remainder missing). Wings whitish-hyaline, veins pale brown, no trace 

 of dark clouds on the cross-veins. Subcostal cross-vein exactly at the tip of Sc, and 

 about half-way between Cu,a and the base of R4+5. Tip of R, rather indistinct, bent 

 up towards costa. shorter than r. Rs gently curved, R4+5 obtusely angled at the base. 

 Cell M3 rather long, very little widened posteriorly, its petiole hardly more than halt 

 as long as M3. Cuia placed at about mid-length of Rs. Haltères slender, whitish yellow. 



Length of body, 5 mm., wing 5 mm. 



Tjitjoeroek Salak, 1000 m., 23. i. 1921 (Dr. H. H. Karny). 



Type 9 in the British Museum. 



