818 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



(/2. Mesoplenral furrow much shorter and straight, nearly 

 horizontal. 

 h\ Malar space at least slightly longer than the height of 

 the eyes. 



i " . Tegulae and venter of female black; male not known ; 

 hind tibiae with an apical cluster of 8-10 stout 

 spines, middle tibiae with 3-4 apical spines. 



nigrosternum, new species. 

 i^. Tegulae of both sexes and venter of female 

 pale;hind tibiae with 4-7 apical spines, mid- 

 dle tibiae with 2, rarely 3, spines at apex, 



szepligetii, new species. 

 ft 2. Malar space shorter than the height of the eyes. 



j^. Labrum narrow, the sides nearly straight and parallel 

 for a short distance; middle tibiae with 1-2, hind 

 tibiae with 2 apical spines, 



melanoptera (Ashmead.) 

 j^. Labrum broader, the sides curved. 



k^. Mouthparts black or blackish; head and tro- 

 chanters typically black or blackish; hind 

 tibiae with from 2-13 apical spines, middle 

 tibiae with 2 spines at apex, 



haemntodes (Brull^.) 



h'^. Beak wholly red, thorax including the tegulae 



wholly red; hind tibiae with 2 apical spines, 



middle tibiae with 1, often 2 spines at apex. 



virginiensis, new species. 



BRACON SLOSSONAE, new species. 



Plate 25, fig. 6; plate 27, figs. 13, 14. 



Apical pits of the pronotmn joined togther and forming a broad 

 transverse groove across the apex; size large; black, the propodemn, 

 metathorax, and episternum of the mesothorax, abdomen, liind coxae 

 and femora clear red; middle tibiae without spines at apex, hind tibiae 

 with two apical spines. Length, 11 mm. 



Feslile. — Head. — Triangular, not quite as wide as long; length, 

 80; width, 73; height of eyes, 35; malar space, 32; width between 

 eyes, 37; width at bottom of head, 25; head very tliick as viewed 

 from the side, profile of the face strongly bulging from the 

 bottom to the insertion of the antennae, and the head projecting 

 backwards to form a strongly arched lobe beliind each eye; mar- 

 ginal ridges of the antennal pits prominent along the sides and below, 

 but nearly obsolete from opposite the median ocellus to the bases of 

 the paired ocelh; interantennal plates not sharply separated and not 

 very prominent; the clypeal foveae small, round, located in a shallow, 

 flat depression, and nearer to the eyes than to the bases of the mandi- 

 bles; head shining, more or less densely clothed \\dth wliitish hairs, 

 each inserted in a puncture, face and cheeks less shining and more 

 closely punctured, vertex and occiput shinmg and smooth except 

 for a small group of punctures beliind each lateral ocellus; eyes 



