200 HYMENOPTERA. 
sion, and on each side at the base and apex an obtuse tubercle ; 
wings of a reddish-yellow, having a broad fuscous stain at the 
base, the apical margins having a paler cloud at their apex, not 
extending to the third submarginal cell in width. Abdomen of 
a splendid blue, the pubescence at the apex black. 
Male. Length 12 lines.—In colour closely resembling the 
female, but the abdomen is bright violet, and the wings are 
paler; the fourth segment of the abdomen, beneath, has on each 
side a floceus of long curled hair. 
Hab. Mexico; Columbia. (Coll. W. W. Saunders, Esq.) 
50. PEPSIS PRISMATICA. B.M. 
Male. Length 10 lines.—Black: antenne of an orange-red, 
having three or four of the basal and apical joints of the antennz 
fuscous; the labrum, mandibles and palpi nigro-piceous ; the 
entire insect exhibiting in different lights beautiful prismatic 
colours, of blue, purple and violet; wings nearly black, with a 
slight blue and green iridescence ; metathorax transversely stri- 
gose ; abdomen subpetiolate. 
Hab. Mexico. 
51. Pepsis DIsSELENE. 
Male. Length 12 lines.—Black: the pubescence black, the 
extreme apex of the flagellum yellow; wings dark fuscous; a 
large subovate silvery spot on the anterior wings a little beyond 
the middle, the spot formed of very short fine silvery pubescence ; 
a subhyaline spot at the base of the second discoidal cell; the 
metathorax thinly covered with long black pubescence, trans- 
versely strigose, the posterior lateral angles produced. Abdomen 
subopake, slightly shining at the base. 
Hab. India (Singapore). (Coll. W. W. Saunders, Esq.) 
52. PEPSIS RUFIPES. 
Pepsis rufipes ?, St. Farg. Hym. in. 472. 5. 
Hab. Cape of Good Hope. 
53. PEPSIS RUFICEPS. 
Pepsis ruficeps, St. Farg. Hym. ii. 489, 34 2. 
Hab. Cape of Good Hope. 
