454 MEMOIRS OF THE CARNEGIE MILSEUM 



Brazil : Santarem. One specimen. 

 Allied to M. 7iigricornis Fain*. 



Metadontia ai-finis, sp. nov. 



Female. — Length 6 mm. Black and marked with yellow much as in M. similis. 

 The front orbits, the cheeks, scape entirely, pronotum above, except a small black 

 spot on each side, a line on each side of the middle niesothoracic lobe clear to the 

 base of the scntellum, the outer margins of the lateral lobes, the sides and apex of 

 the scutellum, except a median black spot on the emarginate plate at apex, yellow. 



The legs are as in M. similis except that the hind femora are black, with a 

 curved yellow line on outer face near apex, the base being margined with yellow, 

 within similarly marked ; femoral teeth, two and three small, the others larger. 

 The abdomen is mostly black, the petiole yellow, the second segment (first body) 

 reddish except at apex above. 



Brazil : Santarem. One specimen. 



HEXASMICRA Ashmead, gen. nov. 



In having the hind femora armed with six large teeth this genus comes nearest 



to Metadontia Ashm., but is easily separated from it by the totally different shaped 



abdomen, which is lanceolate or fusiform, longer than the head and thorax united, 



the petiole being short, not longer than thick. The scutellum at apex is usually 



bidentate or emarginate. 



Hexasmicra transversa (Walker). 



Sniera transversa Walker, Journ. Entom., I., 1861, p. 182, 9 c?. 



Smicra transversa Dalla Torre, Cat. Hym., T., 1898., p. 383. 



Brazil : Ega ; Tapayos (Mr. Bates) ; Chapada ; Santarem. Two female and 



seven male specimens. 



? Hexasmicra trinidadensis, sp. nov. 



Female. — Length 4 mm. Yellow ; a transverse spot on the occiput, the flagellum 

 above, a transverse line at base of scutellum, the femoral teeth and the apex of the 

 hind tibise black. The abdomen is fusiform, the petiole at least five times as long as 

 thick, the middle dorsal segments stained with black or fuscous. The liind femora 

 are armed with six large teeth, the first four acute, the last two l»road, rounded at 

 apex. 



West Indies : Trinidad. 



? Hexasmicra brasiliensis, sji. uov. 

 Male. — Length 4 mm. Yellow ; a transvei-se spot on the occiput, the flagellum, 

 a transverse line on tlie anterior mar<i'in of the middle niesothoracic lobe and a deli- 



