480 TIPULID.^. 



concolorous to the tip. flenitalia of both sexes small. Lerjs 

 pale brownisii yello^v, the tibia? becoming blackish on the apical 

 half, but the actual tips are broadly snow-white, and the middle 

 pair have the snow-wliite portion thickened, much longer in 

 extent, and with a fringe of snow-^\■hite bail's on each side ; tarsi 

 snow-white. Wings clear ; halteres pale yellow. 



Length 7-8 millim. 



Kedescribed from several specimens of both sexes in the Indian 

 Museum, with locahties as follows -.—Calcutta, 22. ii. 10 (at liglit), 

 26. iii. 07, 2S.V.07, 29. vi. 09, 28, vii. 07 to 29. viii. 07, 26-30. 

 ix. 07 ; Sukna, 500 ft., 1. vii. 08 ; the specimens mostly collected 

 by Dr. Annandale ; Peradeniya, Ceylon, 12-16. vii. lO {Green), 

 and 16. ix. 09, at light. 



Tgpe c? in the Berlin Museum. 



Apparently by no means an uncommon species in Calcutta 

 throughout a considerable part of the year. 



The conspicuous snow-white thickening of the tips of the middle 

 tibiae easily differentiates this species from all others in this 

 group. It was originally described from the single type male 

 now in the Berlin Museum, taken at Tumbong Hioug, Borneo. 

 Apparently the female has not been noted before. 



344. Mongoma tenera, Os. Sctc. 



Moi/i/omu tenera, Osteu Sacken, Berl. Ent. Zeits. xxvi, p. 89 (1882) . 



S 2 ■ JJ^dd small, blackish or dark brown ; proboscis short, 

 yellowish ; palpi dark brown ; eyes separated by a narrow frons. 

 Antennae dark brown, with a little pale pubescence, if "bent 

 backwards, they would reach a little beyond the root of the wings; 

 joints of the flagellum long, of nearly equal length, except the 

 first, which is a little longer; short-vevticiWate" {Osten Sacken). 

 Thorax light brown or reddish brown, paler at the sides. Pro- 

 thorax well developed, prolonged into a short neck. Abdomen 

 darker brown, with pale pubescence, the tip blackish ; belly yel- 

 lowish. Genital organs of both sexes small, black. Legs : coxae 

 very pale brownish yellow ; femora brown, extreme ti])s whitish ; 

 tibiae very pale brownish yello^\-, becoming AAhitish towards tips ; 

 tarsi wholly white. Wings clear or very pale greyish ; halteres 

 brown. 



Length 3.4-5 millim. 



Kedescribed from two males and a female in the Indian Museum, 

 the former bearing labels, Sukna, jSorth Bengal, 1. viii. 08, and 

 Nedumangad, South India, 14. xi. 09, and the single female, Sukna, 

 1. vii. 08, all taken by Dr. Annandale. 



Type. The location is uncertain ; originally in Osten Sacken's 

 own collection. 



Osten Sacken's original description is incorporated with the 

 present redescription. 



In the three examples herein described, there is a slight variation 

 from the original description of the species, as the base of the 

 3rd posterior cell is distinctly more proximal than that of the 



