520 TIPULID^. 



and metanotum, blackish grey. Abdomen uniformly dull blackish 

 grey, Avith very minute grey pubescence ; margins of segments 

 very narrowly pale. Belly concolorous, with margins of segments 

 also very narrowly pale. Legs dull yellowish brown, tarsi darker. 

 Wings nearly clear ; a pale blackish spot in middle of costa, on 

 origin of praefurca, at tip of upper fork of 2nd longitudinal vein, 

 and a streak along the cross-veins from the stigma to the 5th 

 vein, \\hicl\ itself is slightly infuscated ; a spot at the tip of the 

 7th vein, and the tips of most of the veins, except the 6th, 

 slightly infuscated ; stigma black, distinct, oblong, large. Halteres 

 whitish. 



Length 5| millim. 



-Described from a slightly damaged specimen in the Indian 

 Museum collection taken by me at light, 20. ix. 08, at Darjiling. 



Section LIMNOPHILim. 



Trichocerina, Kertesz, Catal. Dipt. ii. p. 218 (1902). 



Eyes bare, frons narrow. Proboscis short or very short, often 

 broader than long ; terminal lamellae thick and broad. Antennae 

 16-jointed, joints sometimes very elongate. 



Genital organs of male represented normally (LimnopJiila, sensu 

 stricto) by an elongated basal joint with a pair of hooks or claws 

 at the tip, a dorsal plate of varying shape, and inner appendages ; 

 whilst in some of the other genera or subgenera two dis-tinct 

 joints, in addition to a thick claw-like tip, are apparent in the 

 claspers, wliich vary yet again in other genera.* In the female 

 the ovipositor is- simple, the valves approximately equal. 



Legs long and slender; tibia' with spurs; empodia distinct, 

 ungues smooth. 



Wings with two submarginal cells, normally five (but sometimes 

 only four), posterior cells ; discal cell nearly always present, rarely 

 absent. Marginal cross-vein present, its exact position varying, 

 being placed sometimes just beyond the fork of the 2nd longi- 

 tudinal vein, sometimes near the tip of the 1st longitudinal, or 

 at any intermediate distance according to the species. Marginal 

 cell varying considerably in length, as the 2nd longitudinal vein 

 arises from considerably before, to a little after, the middle of the 

 wing. Subcostal cross-vein generally at tip of auxiliary vein ; 



* Tlie varying characters of the groups of Limnophila, admitted by Osten 

 Sacken as subgenera only, are fully enunciated by him in his ' Monograph of 

 the North American Tipulid.e.' 



