P. CAMERON. HYMENOPTERA. 191 



the punctures round and deep; the vertex less strongly punctured. Prothorax closely, rather 

 strongly reticulated ; a smooth shining space on the lower part of the pleurae. Mesonotum 

 granular; two short furrows in the middle of the apical fourth. The post-scutellum rises from 

 the outer side to a rather sharp, distinct tubercle, the outer side being also raised, the space 

 between the two raised parts being broadly, roundly depressed. Metanotum broadly, roundly 

 narrowed in the middle. First abdominal segment cup-shaped ; the 2 nd a little longer than it 

 is wide at the apex. 



Odynerus Latr. 



1. Odynerus xanthozonus sp. n. 

 Bivak Island, January. 



Black, a small mark on the upper part of the eye incision, almost the apical fourth 

 of the 2 nd abdominal segment and the greater part of the following pale orange yellow above 

 and narrowly and triangularly on the sides of the ventral segments; the wings uniformly 

 fuscous violaceous; the 2 nd ventral segment with a large smooth, shining triangular plate on 

 the base. Clypeus broadly pyriform, longer than wide, strongly closely punctured, except 

 along the depressed sides, the apex transverse. Pronotum transverse, margined; the sides of 

 metanotum broadly rounded, as is also the apex of the post-scutellum. First abdominal 

 segment cup-shaped, the second longer than wide, its apex punctured; the 3^ to 5* are 

 strongly but not very closely punctured ; the propleurae strongly, closely striated ; the base 

 and apex of mesopleurae and the metapleurae except at the apex (where the puncturation is 

 sparse) smooth. Basai 2 abdominal segments opaque, alutaceous, the apical half of the 2 Q d 

 behind the band finely irregularly punctured, much more strongly on the sides than in the 

 centre, the ventral surface punctured like the upper sides. The puncturation on the mesopleurae 

 runs into reticulations and is finer on the lower than on the upper half. Tegulae smooth, 

 sparsely punctured on the inner half. Near the apex of the mesonotum in the centre are 2 

 smooth spaces, more than twice longer than wide. The last ventral segment has the apex 

 roundly but not deeply incised. 9- 



Length 12 mm. 



2. Odynerus lorentzii sp. n. 

 Bivak Island, January. 



Black, the basai 2 abdominal segments ferruginous, the apex and sides of the ist and 

 the apex of the 2nd tinged with yellow; the underside of the antennal scape, the antennal 

 keel and the sides and apex of the clypeus clear yellow, the black central mark longer than 

 wide, slightly narrowed towards the top and obliquely narrowed at the apex; the apex of 

 the clypeus broadly, almost roundly incised. Apex of post-scutellum broadly rounded. The 

 sides of metanotum broadly rounded and tinged with reddish fuscous. Wings uniformly fuscous 

 violaceous. Outer edge of the tegulae brownish. Ç. 



Total length 12 mm. 



Densely covered with short white pile. First abdominal segment cup-shaped, the 2 Q d 

 nearly twice longer than wide ; base below with a smooth, bare, shining semicircular space, 

 obliquely sloped. The puncturation on the abdomen is weak. 



