230 HYMENOPTEEA. 



11 (12). Hind tibiae black at the base and apex; metanotum for the greater 



part black, a yellow transverse line near the base ; a large yellow 

 mark close to the base of the black on the second abdominal 

 segment obtusispina. 



12 (11). Tibiae yellow or fulvous. 



13 (1^. Hind legs fulvous ; coxae not marked with black ; femora not lined 



with black. 



14 (15). Metanotum broadly black; the black on the second abdominal seg- 



ment transverse at the base fulvipes. 



15 (14). Metanotum yellow, except a black cross ; the black on the second 



abdominal segment deeply indented at the base cruciatus. 



16 (13). Femora lined with black; coxae with a large black mark. 



17 (18). The central longitudinal black line on the metanotum joined to the 



spiracles by a black line; the black on the second abdominal 

 <\ segment sharply indented at the base fulvofemoratus. 



18 (1&). The central black line on the metanotum not joined to the spiracles 



by a black line; the black on the second abdominal segment 

 rounded or transverse at the base. 



19 (20). Central black line on the metanotum broadly dilated at the base, 



almost touching the spiracles ; no furrow in its centre close to 

 the keel ; the black in centre of the second abdominal segment 

 broad at the base montezuma. 



20 (19). Central line scarcely dilated at the base, a furrow down its centre; 



the black on the second abdominal segment narrow . . . . . canaliculatus. 



1. PolycyrtllS Obtusispina. (Tab. X. fig. 1, metanotum and base of abdomen.) 



Niger, flavo-varius ; lineis 2 mesopleuralibus, macula ad apicem abdominis segmenti l l , basi apiceque tibiarum 



posticarum, nigris ; alis hyalinis, apice fumatis, stigmate nigro. $ . 

 Long. 18 millim. ; terebra 8 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Antennae stout, nearly as long as the body ; the basal joints beneath and the seventh 

 to eleventh joints, white. Head yellow, posteriorly and the vertex in the centre black ; 

 mandibles punctured, the tips blackish ; frontal spine conical. Thorax black ; the pro- 

 sternum beneath, a broad line on the edge of the pronotum, the tegulse, a line on either 

 side of the apex of the middle lobe of the mesonotum, the scutellar keels, the apex of 

 the scutellum, the postscutellum, and the sutures, yellow ; mesopleurse yellow, except a 

 black mark beneath the wings enclosing the yellow tubercles, a broad oblique mark in 

 the centre, and the mesosternal suture broadly, black. Metanotum black above the trans- 

 verse keel, except a curved mark in front of the spiracles ; from these a broad black line 

 runs down the side to a little below the spines, where it projects outwards ; and in 

 front of the spines these lateral lines are united by a broad transverse one, while from 

 the centre of this latter a short, moderately thick line runs down to the apex. Meta- 

 pleurae yellow, except the suture, which is broadly black, and the above-mentioned 



