of Brazilian Pompilide. 267 
golden green, the femora and the anterior tibia ferruginous, the coxes 
green, the tibiz and tarsi fuscous; the wings hyaline, the nervures 
black. The abdomen with a short petiole. 
In some examples the colour inclines to blue-green, the abdomen 
being nearly black. 
fab. St. Paul (Brazil). In the National Collection. 
11. Agena aulica. 
A. viridis, clypeo, pedibus abdominisque basi pallide ferrugineis; fronte 
aureo-sericata, 
Female. Length 43 lines. Bright green, and covered with a pale 
downy pile; the clypeus, mandibles, palpi, and scape of the antennz 
pale ferruginous; the face covered with golden pile. Thorax: the 
prothorax and legs pale ferruginous; the thorax in different lights has 
a golden lustre; the wings hyaline and iridescent, the nervures testa- 
ceous ; the apical joints of the tarsi fuscous. The abdomen with a 
short petiole; the basal segment and the apical margins of the following 
segments pale ferruginous. 
fab, St. Paul (Brazil). In the National Collection. 
Genus Pompitus, Fabr. 
1. Pompilus imitator. 
P. niger, facie, metathorace et coxis pilis argentatis ornatis; alis nigro- 
fuscis, marginibus apicalibus pallidis ; tibiis tarsisque fusco-ferrugineis. 
Female. Length 53 lies. Black; the face with a thin silvery 
pile; the clypeus emarginate, and covered with a changeable silky 
brown pubescence; the mandibles, at their apex, and the antenne 
beneath, ferruginous. Thorax: the posterior margin of the prothorax 
curved; the metathorax, postscutellum, and cox adorned with bright 
silvery pile; the legs fusco-ferruginous and strongly spinose; the 
wings dark brown, with the apical and posterior margins pale. Abdo- 
men covered with a fine silky bloom, somewhat plum-coloured. 
Hab. Eiga (River Amazon). In the National Collection. 
This insect bears a strong resemblance to some species of wasps 
belonging to the genus Chariergus. 
2. Pompilus fragilis. 
P. niger, gracilis, pedibus elongatis; alis hyalinis et iridescentibus, anticis 
fascia pallida ornatis. 
Male. Length 3} lines. Black, and covered with a changeable thin 
silvery pile very bright on the face, coxee, and sides of the metathorax 
in certain positions ; the apical half of the mandibles and the palpi pale 
rufo-testaceous ; the wings hyaline, iridescent, and having a faint 
fuscous fascia crossing the superior pair at the marginal cell; the ante- 
rior tibiz and the basal joints of the tarsi rufo-testaceons; all the 
