106G. SYXOrSIS OFSEOTROPICAL LIMyOBiy.H:— ALEXANDER. 499 



Abdomen: tergum dark browni; apices of the segments yellowisli; 

 steniitesdullj^ellow; hypopj'gium yellow. 



ilalo, Sau Carlos, Costa Kica (coll. Schilde and Burgdorf). Male, 

 Igarape-assu, Pani, Brazil (alcoholic, Jan. 30, 1912) (Parisli, coll.). 

 Female, same place and collector as last (pinned, Jan. 29, 1912). 



Genus MONGOMA Westwood. 



Mongonw Westwood, Trans. Eut. Soc. Lond., 13S1, p. :;G4. 

 Trcntepohlia Bigot, Ann. Soc. Ent. France, 1854, p. 474. 

 I'aTamongoma Bruxetti, Kec. Ind. Mus., vol. 6, 1911, p. 295. 

 Mongomioides Brunetti, Rec. Ind. Mus., vol. G, 1911, p. 296. 

 Mongomdla En'DErleix, Zool. J;ihrbuch, vol. 32, 1912, p. Gl. 



The genus Mongoma was erected by Westwood in 1 SSI with the 

 ASrkanfragiMma as type. Xo mention is made, in tliis paper, of ths 

 Limnohia irentepohlii Wiedemann which Bigot, in 1854, had made 

 the type of his new genus Treniepohlla. Osten Sacken' uses the 

 genus Mongoma but mentions that it is congeneric with TrcniepoMia. 

 Skusc- and Bergroth^ use the name TrcntepohUa. Edwards* uses 

 Trent fpohlia andwTites that as Bigot definitely mentioned ireniepoMii 

 as tj'pe, the name can not be rejected. Brunetti' splits the old genus 

 Mongoma into three, proposing Paramongoma for the albitcrsis group 

 of the genus, and Mcngomioides for treniepoMii and its allies. Bru- 

 nei ti's statement that australasise. is a strict 'Mongoma" (p. 291) 

 and, a little later, that "The oidy Oriental species definitely referable 

 to Paramongoma is albitarsis Doleschall, but australasiee Skuse is 

 certainly- congeneric" (p. 296) is confusuig. 



■^'ill more recently Enderlem" has retahicd Trcntepolilia for irente- 



' and its allies, as was suggested by Edwards,' Mongoma for 



: Ilima and its allies, and has proposed the new name Mongornella 



fur the albitarsis group, with pallida Willistcn as type. The name is, 



of course, strictly sj^nonomous vrith Paramongoma Brunetti. 



I have recently shown° that the species of the genus show a veiy 

 gradual transition from one to another, and no division, not even 

 subgeaeric, can be accepted. For instance, the new species, M. dis- 

 juncta would represent another new group because of its Im-q median 

 branches that reach the wing margin, the Paramongoma group having 

 but a single median vein. There is but one valid genus, with but a 

 single subgenus, included in the Mongoma group and its species have 

 an equatorial distribution (tropicopolitan). 



' studies on Tipiilida:, pt. 2. Berl. Ent. Zeitschr., vol. 31, p. 201. 

 ' Dipt. Australia, p. 217. 

 » Ent. Tidskr., vol. 9, p. 13". 



• Ann. and Mag. Nat. Hist., scr. S, vol. 8, 19n, p. 63. 

 » Kec. Ind. Mus., vol. e, p. 291. 



5Zo61. Jahrbuch, 1912, pp. 60-62. 

 'Mem, p. 63. 



* Can. Ent., 19X2, p. 8S. 



