188 HYMENOPTERA. 
the middle, forming small tubercles ; wings dark fuscous, with a 
metallic-green iridescence. Abdomen smooth and shining, im- 
punctate. 
Male. Length 6 lines.—Differs in having the face, mandibles, 
antennz, and anterior legs obscure ferruginous ; the thorax and 
wings as in the other sex. 
Hab. West Africa (Whydah). 
22. MYGNIMIA INSIGNIS. B.M. 
Female. Length 12 lines.—Black: head pale ferruginous or 
yellowish-red, the prothorax, tegule and legs of the same colour, 
the latter slightly spinose, the posterior tibiz finely serrated ; 
the metathorax truncate ; the wings deep fuscous, with a bril- 
hant violet iridescence. Abdomen black, the apex ferruginous. 
Hab. West Africa. : 
This species is of precisely the same form as M. perplezxa, 
and both scarcely appear to belong to the genus; but the only 
difference, that of having the metathorax truncate and the ab- 
domen sessile, is of frequent occurrence in the Pompilide. 
23. MyYGNIMIA IMPERIALIS. B.M. 
Male. Length 14 lines.—Black : the face below the insertion 
of the antennz, the scape in front, the clypeus, labrum, palpi 
and mandibles, ferruginous, the tips of the latter black. Thorax : 
above, clothed with very short black velvety pubescence, the 
metathorax having an elevated longitudinal carma down the 
centre, the posterior lateral angles produced and forming obtuse 
tubercles ; very finely transversely striate; wings black, with a 
rich purple iridescence, an obscure hyaline spot at the base of 
the second discoidal cell ; the legs ferruginous, the intermediate 
and posterior cox, as well as the posterior femora above, fus- 
cous; the abdomen covered with short black pubescence; the 
base sli ghtly shining. 
Hab. West Africa. 
24. Mycnimia MEG@&RA. 
Male. Length 12 lines.—Black : the clypeus rounded at its 
anterior margin ; the thorax clothed with short black pubescence, 
that on the metathorax is long and thinly scattered; the meta- 
thorax convex above, transversely striated and truncate behind, 
the truncation smooth and shining; wings black, having a bril- 
