LABUS.— MOTfTEZFMIA. 349 



Eadial cell wide, truncate or bluntly rounded at apex. Abdomen 

 with a very long petiole, which is linear, only slightly dilated at 

 the apex." (Sauss.) 



619. Labus humbertianus, Sauss. Novara-Reise, JSym. p. 4, 2 d > pi- h 

 tig. 2 (wiDg). 



5 . Head, pro- and mesonotum, scutellum, and basal half of the 

 petiole of the abdomen above coarsely and closely, median segment 

 and 2ud abdominal segment very sparsely and finely punctured, the 

 3rd and following segments of tlie abdomen smooth ; clypeus convex, 

 bidentate anteriorly; median segment with a deep and broad 

 sulcation, bidentate at apex. Black, with obscure silvery pile; the 

 pronotum anteriorly, the lateral angles of the scutellum, and the 

 apical margins of the petiole and of the 2nd abdominal segment, 

 yellow ; legs, the posterior tibiae at base yellow ; wings fusco- 

 hyaline, tegulse yellow, nervures black. 



(5 similar; the scape of the antennae in front and the middle 

 of the clypeus yellow. 



Var. 5 resembling the S in colouring, the tibiae of all the legs 

 above yellow. 



Hoi). Ceylon; Burma; Tenasserim. 2 <S > Length 8-9: ex'i). 



mm. 



Genus MONTEZUMIA. 



Eumenes, pt., Fabr. Syst. Piez. p. 288 (1804). 

 Odynerus, pt., Spin. Ann. Soc. E7it. Ft: x, p. 127 (1841). 

 Montezumia, Sauss. Mon. Guep. Sol. p. 87, pi. v, fig. 3 (1852). 



Type, M. morosa, Sauss., and 3f. rufidentata, Sauss. 



Banrje. Neotropical and Oriental regions. 



Head large, concave posteriorly; mandibles moderately long, 

 narrow, the teeth on the inner margin rounded; antennae inserted 

 about the middle of the face ; clypeus broadly pyriform. Thorax 

 not narrowed anteriorly, truncate, with 

 the head closely approximate, oval poste- 

 riorly, with a rounded steep slope ; legs 

 stout, of moderate length. Wings long and 

 broad ; radial cell in fore wing deep, the 

 apex acute and on a level with the apex 

 of the 3rd cubital cell ; 1st cubital cell 

 one-fourth as long again, measured on the 

 cubital nervure, as the 2nd and 3rd united; 

 2nd strongly constricted at top, 3rd \\ider 

 above than on the cubital nervure. Abdo- 



Fia. m.-Montczumia '"^^ (''^ the Oriental species) petiolate, the 

 hurmanica, 2. |. petiole much broadened at the apex; 2nd 

 segment very largo ; remaining segments 

 much smaller, often withdrawn telescopically inside the 2ud. 



