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Genus Megarhinus. 
glistening blue; head fuscous, glistening blue on the apex; thorax elevated, 
fuscous, with anterior margin and a spot in front of the wings glistening 
blue; abdomen fuscous, apex strongly rufous-ciliate; feet blue, metallic, 
femora testaceous beneath ; antennae fuscous ; palpi steel-coloured; frons 
and vertex glistening emerald green and copper; thorax steel grey and 
glistening green; pleurae ferruginous; scutellum dull yellow;. abdomen 
steely with ferruginous spots on either side and forming an interrupted 
median line, sides with silvery spots, apex with blood-red cilia; venter 
silvery with yellowish tomentum; legs steely, femora silvery below.” 
Habitdt .—South America. 
3. Megarhinus inornatus. Walker. 
(Proc. Linn. Soc. Loud. viii. p. 102.) 
(Figs. 25 and 26, PL VII.) 
■i 
Thorax dark brown, almost black, with bright bronzy scales, 
azure ones over the roots of the wings. Abdomen blue at the 
base, then purple, then coppery-red, with caudal tuft of black 
and orange hairs, white tufts anterior to it. Legs of £ purple, 
femora pale below ; in the 9 the tarsi are basally banded white 
and also the metatarsi in the fore and mid legs. 
£. Head dark brown, with flat metallic bronzy scales, 
becoming dark peacock blue in front and showing metallic coppery 
and red tints at the sides ; palpi purplish, the penultimate joint 
half the length of the apical one ; antennae brown, basal joint 
black, the second joint equal to one and a half of the following 
joints, scaled with metallic and yellowish scales; proboscis 
metallic black to purple. 
Thorax dark brown, almost black, with bright bronzy scales, 
traces of azure ones over the roots of the wings; prothoracic 
lobes with azure flat scales; pleurae brown, with numerous 
white scales." 
Abdomen livid, as described by Walker, when denuded, but 
covered with blue scales on the first two segments, brilliant 
purple on the next three, and the rest purple and coppery red ; 
caudal tuft composed of a small white tuft on each side of the 
sixth, a dense one of a black and coppery hue on the seventh, 
and of an orange and then black colour on the eighth. 
Legs with the femora pale below, remainder covered with 
purple and violet scales and dark bristles. Wings with the veins 
