HYMENOPTERA. 141 
114. PompiLus OPTIMUS. B.M. 
Female. Length 11 lines—Black: the head and thorax 
clothed with short black pubescence, intermixed with longer erect 
black hairs ; the metathorax has on each side at its base an ele- 
vated tubercle, its lateral margins are elevated, and it is trans- 
versely rugose-striate ; wings dark brown, with bright shades of 
violet and purple iridescence ; the legs ferruginous, the cox, 
trochanters, and extreme base of the tibiee black; the tibiee and 
tarsi spinose, the posterior tibiz strongly serrated ; the claw- 
jomt of the tarsi black. Abdomen: the basal segment shining, 
and thinly covered with long black pubescence ; the second and 
following segments covered with an obscure sericeous pile. 
Hab. Port Natal. 
115. PoMPILUS PRUINOSUS. B.M. 
Female. Length 63 lines.—Black : entirely covered with a fine 
grey pile; on the face, cox and metathorax it is bright and 
silvery ; the labrum, mandibles in the middle, and the palpi fer- 
ruginous. The posterior margin of the prothorax arcuate; a 
fuscous stain traverses the nervure at the apex of the externo- 
and interno-medial cells ; a similar fascia, half the width of the 
marginal cell, passes across the wing and terminates in the middle 
of the third discoidal cell; the wings have a narrow fuscous 
cloud at their apical margins; the tibiz and tarsi externally spi- 
nose ; the basal margins of the second and third segments of the 
abdomen are destitute of silvery pile. 
Hab. Port Natal. 
116. PoMPILUS RUFO-CINCTUS. B.M. 
Female. Length 4 lines.—Black: the clypeus, palpi, man- 
dibles, and antennz ferruginous ; five or six of the apical jomts 
of the flagellum fuscous ; the face has a fine silvery pile. Tho- 
rax: the sides beneath and the metathorax covered with a fine 
silvery pile ; the posterior margin of the prothorax arcuate ; the 
metathorax transversely and finely rugose; wings hyaline and 
iridescent ; a fuscous stain traverses the externo-medial nervure, 
and an irregular fascia runs from the base of the marginal cell to 
the middle of the third discoidal cell; the extreme apex of the 
superior wings fuscous ; the tegule and legs ferruginous. Ab- 
domen: the apical margins of the three basal segments ferru- 
ginous, the following segments entirely so. 
Hab. Port Natal. 
