28 HYMENOPTEBA. 



smaller; the second cubital cellule is much longer, and the abdomen shorter and 

 broader compared with its length. M. imitatrix is readily known from it by the shallow 

 frontal area, small frontal foveae, shorter and thicker antennae, much shorter second 

 cubital cellule, and bifid claws. 



14. Monophadnus cordigera. 



Tenthredo cordigera, Beauv. Ins. Afr. Amer. p. 97, Hym. t. 9. f . 4 (1805) . 



Monophadnus cordigera, Kirby, List of Hymen, i. p. 175 1 . 



Allantus barda, Say, Bost. Journ. i. p. 218 2 . 



Selandria barda, Norton, Proc. Bost. Soc. viii. p. 220 ; id. Trans. Amer. Ent. Soc. i. p. 247. 



Selandria dubia, Cresson, Proc. Ent. Soc. Phil. iv. p. 264 ; Nort. Trans. Amer. Ent. Soc. i. p. 248. 



Hob. Noeth Ameeica. — Mexico 1 . — Venezuela 1 ; Beazil 1 . 



I quote the above from Kirby x . T. cordigera is possibly my M. suturalis. But 

 the latter is not Allantus barda ; for that is stated to have claws with a " very minute 

 obtuse inner tooth, distant from the tip," while in M. suturalis it is equally cleft ; 

 Cresson, too, says that the abdomen in Selandria dubia is " short, almost as broad as 

 long," which does not apply to M. suturalis. Norton states that the claws in A. dubia 

 are as in 8. barda. 



15. Monophadnus suturalis. 



Niger, pronoto, mesonoto tegulisque runs; tibiarum anteriorum margine antico sordide testaceo; alis viola ceis. 

 Long, fere 11 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Antennae shorter than the abdomen, thickened in the middle, eighth and ninth 

 thinner than the sixth and seventh, which are rounded on the lower side, third joint 

 about one third longer than the fourth ; pilose. Sutures on vertex broad, the part 

 behind the ocelli and bounded by the sutures raised and separated from the ocelli by an 

 indistinct furrow ; in front in the centre of the raised portion is a fine suture. Frontal 

 area clearly defined, open behind by a narrow furrow, and in front it is continued by a 

 furrow into the central fovea, this furrow being much wider than the one behind ; 

 central fovea larger than the others ; lateral round. Clypeus rounded. The transverse 

 radial nervure is received a little past the middle of the cellule, the transverse median 

 nearly in the middle ; the second cubital cellule is not much longer than the first, and 

 not half the length of the third ; it has a large horny point in the centre. The claws are 

 thick, with the apex cleft. The tarsi are a little longer than the tibiae ; the metatarsus 

 scarcely so long as the succeeding joints. The anterior knees, tibiae, and tarsi are 

 dirty testaceous in front. 



The male has the third cubital cellule much shorter ; there is no furrow leading 

 from the frontal area into the central fovea, so that the area is a mere pit enclosing the 

 ocellus ; the base is narrow, the apex wider and rounded. The base is closed ; and 

 there is no suture on the pad-like elevation behind the ocelli. 



