296, Records of the Indian Museum. [Vol. VI, 



Two North American species come in PariDiiongoma — pallida, 

 Will., and vianca, Will., both described under Mongoma. 



Both differ by the presence of a short 3rd longitudinal vein, 

 of about the length of that in Mongoma palUpes, Os. Sac, the 

 contact between the 2nd longitudinal vein and the discal cell 

 not being punctiform. As the length of the 3rd longitudinal 

 vein varies in different species, I think these two with very short 

 ones may be included in Paraniongonia, the remainder of the 

 venation being practically identical. In manca a further (com- 

 paratively minor) difference is apparent by the marginal cross-vein 

 joining, not the praefurca as usual, but the upper branch of the 

 2nd longitudinal vein,' thus making the ist sub marginal cell 

 nearly square. 



The only Oriental species definitely referable to Paraniongonia 

 is albilarsis, Dol.,^ described from Java, but atistralasiae, Skuse, is 

 certainly congeneric. 



albitarsis, Dol. (Cylindrotoma). Amboina. 



I have never met with this, nor seen it recorded since the foun- 

 dation of the species, nor is the location of the type ascertainable. 



MONGOMIOIDES, mihi, gen. nov. 



Type of genus Lininobia irentepohlii , Wied. 



Differs from Mongoma, s. s., by possessing only three jiosterior 

 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. The marginal cross- vein (in the four species known to me) 

 is more distad than in Mongoma^ and the first section of the 2nd 

 longitudinal vein {i.e., that portion up to the origin of the 3rd 

 vein) is shorter than in Mongoma, not longer than one-third the 

 length of that vein. Upper branch of 4th longitudinal vein 

 nearly straight or gentl^^ curved: posterior cross-vein distinctly, 

 but not much, before the fork of the 4th longitudinal vein. 

 (This may be found a variable character, when additional species are 

 discovered.) Remainder of venation and all other characters as 

 in Mongoma. 



1 Williston (Tr. Ent. Soc. Lond., 1896, p. 292) includes this amount of varia- 

 tion in the position of the marginal cross-vein, in the generic diagnosis. 



2 Doleschall's figure is rather slovenly drawn, as the ist longitudinal vein is 

 shown emerging from the auxiliary vein near its tip ; the 2nd vein is straight, 

 after the bend, which takes place at the exact corner of the discal cell, there 

 being neither srd longitudinal vein nor anterior cross-vein. There are only three 

 posterior cells, of which the first two are subequal, with obtuse pointed bases ; 

 the posterior cross- vein is a little beyond the base of the discal cell, which is 

 about twice as long as broad. The anal cell is open; apart from this, the 5th 

 and 6th veins bear the same relation to each other as in Mongoma. The jtb 

 vein is not shown, perhaps due to the full insect being illustrated, with the wings 

 rather close to the body ; in this position the 7th vein would be easily 

 obscured by the proximity of the wing to the abdomen. 



