MOXGOMA. MONGOMIOIDES. 481 



2nd, and is pointed (as it is in J/. fragilUma, Westw., from Africa). 

 The bases of these two cells should be in a line according to the 

 author of the species. Again, in two of the present specimens 

 the posterior cross-vein is in a line with the base of the discal 

 cell, and occurs a little before it in tlie third, but this character is 

 known to be variable in the family, and there is little reason 

 to doubt the identity of the present form with Osten Sacken's 

 species. 



345. Mongoma pallidiventris, sp. nov. 



5 . Bead black ; back of head conical, with bristly hairs ; eyes 

 contiguous above. Proboscis conical, elongated, bilobed, hairy; palpi 

 yellowish brown. Antennal scape yellow, 1st joint cylindrical, 

 rather long, 2nd half as long, wider at tip ; flageJlum of fourteen 

 equal elongated dark bro^^■n joints ; the wholt; antennae minutely 

 pubescent, each joint bearing a few long hairs. Neck shortly 

 conical, with a single transverse row of strong hairs. Thorax : 

 dorsum dark mahogany-brown with a black middle stripe in front 

 of the suture ; the post-sutural mesonotum divided by a wide 

 post-sutural yellowish depression; sides of thorax wholly yel- 

 lowish, also the scutellum, which is sometimes tinged with brown, 

 bearing a few hairs ; dorsum of metanotum dark brown, quite 

 bare. An irregular row of hairs on each side of the thoracic 

 dorsum, extending nearly to the suture ; behind the suture a row 

 of longer bristly hairs on each side, also two fan-shaped sets of 

 hairs below the root of each wing. Abdomen brown, shortly 

 pubescent; blacker at base, and more or less on posterior borders 

 of segments ; tips yellowish. Belly uniformly livid yellow. Ovi- 

 positor yellow, rather long, slightly curved, apparently encased at 

 will in a sheath-like arrangement on the ventral side of the last 

 segment. Ler/s black, minutely pubescent ; coxae and trochanters 

 livid yellow ; femora pale at base, with a few long hairs at tip, 

 hind pair with minute serrulation below at base ; tibiae whitish at 

 tips ; tarsi whitish. Wings clear, veins distinct, black ; stigma 

 indistinctly brownish ; discal cell present ; venation as in 21. pen- 

 nipes, Os. Sac. Halteres brown. 



Length b-Q millim. 



Described from four females (including type) in the Indian 

 Museum from Pallode, 20 miles N.E. of Trivandrum, Travancore, 

 S. India. 15. xi. 08 {Annandule). 



MONGOMIOIDES, Bnm. 

 Mongomiuides, Brunetti, Rec. Ind. Mus. vi, p. 296 (1911). 

 Trentepohlia, Bigot, Ann. See. Ent. France, (3) ii, p. 473 (1854). 



Genotype, LhnnoUa trentepohlii, AVied. ; by present designation. 



Difiers from Mongoma by possessing only three posterior 

 cells instead of four, and by the discal cell being absent. It 

 agrees with Mongoma in the presence of the 3rd longitudinal vein, 

 and in the anal cell being closed at a greater or less distance 

 before the border. 



