100 HTMENOPTEEA. 



£ . — l. Halticella ornaticornis. 



Nigra ; basi antennarum, scapo, flagelli articulis 2-3, tegulis, trocbanteribus, femoribus anterioribus subtus, 



tibiis anterioribus proparte tarsisque runs ; alis byalinis, macula subcostali fusca. 

 Long. 5 millim. 



Hah. Panama, Bugaba (Champion). 



Head and thorax strongly punctured, covered with a stiff silvery pubescence. 

 Abdomen smooth and shining, the apical segments thickly covered with a longish 

 silvery-white hair. Head not very deeply excavated in front. Antennae a little longer 

 than the head and thorax together, moderately stout, thickest at the apex. Scutellum 

 bordered behind, the border incised in the middle. Metathorax strongly reticulated. 

 Petiole very short, so that the abdomen is semi-sessile. The four anterior tibiae are 

 black (more or less) in the middle ; the thick posterior femora have no teeth beneath ; 

 the spurs on the hind tibiae are short and thick. Wing-nervures testaceous, except at 

 the black fascia in front of the cubitus, which is also black. The ovipositor projects a 

 little. 



ACANTHOCHALCIS. 



Antennae 11-jointed, the flagellum of nearly equal thickness throughout ; the first 

 two joints small, the rest much longer than broad, the last conical at the apex, slightly 

 longer than the penultimate (I am not quite sure but that the last joint in reality 

 represents two closely united), inserted not far from the mouth. Antennal groove 

 deep, reaching close to the ocelli, and only wide enough to receive the two antennae; 

 its sides with a large broad projecting border. Pronotum large, subquadrate, pro- 

 jecting in the middle so as to fit into the head, which is concave behind ; sides of the 

 prothorax excavated. Metathorax produced at the sides into a large, flat, triangular 

 mass. Abdomen sessile, its apex produced into a sharp spine ; at the sides, where it 

 clasps the ovipositor, it is toothed. Ovipositor as long as the abdomen. Cubitus half 

 the length of the ulna; otherwise the nervures in both wings are as in Leucospis. 

 Posterior femora thickened, toothed on the underside ; claws simple ; tibiae with one 

 spur at the apex. 



In the form of the antennae, head, thorax (except in the peculiar shape of the meta- 

 thorax), legs, and wings this genus does not differ from Leucospis, which it also resembles 

 in its large size ; but the form of the abdomen and ovipositor is very different, the 

 wings, also, not being folded wasp-like, as in Leucospis. The form of the last abdo- 

 minal segment is different from anything known in other Chalcidina with elongated 

 ovipositors, for it is not developed into a long sheath clasping the ovipositor in 

 all its extent. The apical segment is not unlike what we have in Sir ex; it bears a 

 stigma. 







