1864.] 319 



duced ; scutellum with a large subtriangular, white spot at tip ; the 

 upper spot on each side of the metathorax is much smaller than the 

 lower one; the wings are slightly iridescent, the areolet much larger, 

 more oblique, and scarcely petiolated; the legs are dark fulvous, the 

 posterior tibiae and tarsi blackish, the posterior coxae immaculate, the 

 anterior trochanters are white in front; the abdomen is marked the 

 same, except that the spots on the 7th segment are situated as on the 

 preceding segments. 



3. Rhyssa nitida, n. sp. 



Black; face and frontal orbits white; legs pale fulvous, varied with white 

 and dusky : wings hyaline, iridescent. 



Male. — Black, polished ; face beneath the antennae, the frontal or- 

 bits not quite reaching the summit of the eyes, and the palpi, white ; 

 antenn?e two-thirds the length of the body, piceous, paler towards the 

 apex. Thorax: mesothorax coarsely and transversely rugose; pleura 

 and metathorax polished, slightly pubescent; scutellum transversely 

 aciculate. Wings hyaline, iridescent; nervures and stigma fuscous, 

 the former pale at base and the latter with a pale spot at base; areolet 

 minute, oblique and petiolated. Legs pale fulvous; the anterior coxae 

 and trochanters entirely, the anterior femora in front, their base and 

 apex behind, their tibiae and tarsi, the middle trochanters, tips of their 

 femora, their tibiae within, and the basal two-thirds of the posterior 

 tibiae within, all white; the middle tarsi, tips of the posterior femora, 

 their tibiae at tips and without, and their tarsi, dusky. Abdomen twice 

 as long as the head and thorax, slender, polished, immaculate above ; 

 beneath, the incisures are narrowly whitish. Length 7 lines; expanse 

 of wings 9 lines. 



/ra6.— Viroinia. Dr. T. B. Wilson. 



