312 Records of the Indian Museum. [Vol. XV, 



out of Mongoma into one. If so, well and good, but I have seen speci- 

 mens or figures of most of the oriental species and figures of wings of a- 

 number of others and they all fall easily into one of the five genera 

 admitted in this paper. Of non-oriental species, fragillima, Westw. 

 from Africa, avMralasiac, Skuse from Australia and disjuncta, Alex, from 

 Brazil, belong to Mongoma (.s. sir.) ; manca and 'pallida, both Williston, 

 from North America, longifusa, extensa and niveitarsis, all Alex, from 

 Brazil, Panama and Porto Rico respectively belong to Paramongoma ; 

 and exornata Bergr. from Africa, gracilis Ender. from Madagascar and 

 zamhesiae, Alex, from the Zambesi River to Trentepohlia. 



His disjuncta has the anal cell open instead of closed, but this is not 

 suggested as a generic character any more than the open or closed nature 

 of the discal cell in those genera in which this character is understood 

 to be variable. His metatarsaia from Panama and his leucozona ^ belong 

 to Trentepohlia with open instead of closed anal cell. 



As the Mongomyiae form a definite natural group there can be no 

 harm in regarding its sections as subgenera if desired. 



Table of genera. 



A. Fou posterior cells (discal cell present ; 3rd vein pre- 



sent ; anal coll closed).- 



B. 2nd longitudinal cell forked ..... Mongoma, Westw. 



{sensu str. ). 

 BB. 2nd longitudinal vein simple ..... Plesiomongoma, gen. 



nov. 

 AA. Three ijosterior cells. 



C. 2nd longitudinal vein forked. 



D. Discal cell present ; 3rd longitudinal vein absent or 



very short ; anal cell open ..... Paramongoma, Brun. 

 D. Discal cell absent ; 3rd longitudinal vein of normal 



length ; anal cell closed or open .... Trentepohlia, Big. 

 CC. 2nd longitudinal vein simple ... . Anchimongoma, gen. 



nov. 



MONGOMA Westw. 



cariniceps, Ender., Zool. Jahr. XXXII, p. 60 (^ (1912). Sumatra. 



Type in Stettin Zoological Museum. 

 pallidiventris, Brun:, Fauna Brit. Ind. Dipt., p. 481 $ (1912). 



Travancore. Type in Indian Museum. This is synonymous 

 with tenera, Os. Sac. 

 obscura, de Meij., Bijd. tot Dierk. XIX, p. 48 (^ (1913). Waigou. 

 albipennis, id., Tijd. v. Ent. LVI, p. 3.53 $ (1913). Java. 



Types (uniques) of both species in Amsterdam Museum. 



Table of Oriental species. 



A. ]\11ddle tibiae with conspicuously thickened tips througii 



the presence of short snow-white pubescence . . jKnyiipes, Os. Sac. 



AA. Middle tibiae not so ornamented. 



B. Tibiae snow-white except middle third black (long 



10 mm.) ........ S'plendida, sp. nov. 



iiB. Tibiae not nearly so extensively snow-white. 



C. Wings with distinct suffusion over tip of 2nd vein and 



at tip ; costal cell yellow ..... Icenipi, sp. nov, 

 CC. Wings clear ; costa never yellow.^ 



1 I have seen no reference to the description of this species. 



2 Only open in one sj^ccies known to me M. diytiitcta, Alex, from Brazil. 



3 Except in flava in which the whole insect is yellow, wings as well. 



