219 
Genus Megarhinus. 
Abdomen metallic purple, 1st 
segment peacock-blue, with 
apical lateral golden spots 
and golden venter; mid legs 
with 2nd and 3rd tarsi white 
beneath. purpureus. n. sp. 
(aa) Caudal tuft steel-blue and white. 
Abdomen steel-blue in $ , green, 
blue and purple in the ? ; 
penultimate joint of hind 
tarsi white. Portoricensis. Yon Roder. 
(aaa) Caudal tuft yellow. 
Abdomen golden green; 2nd 
tarsal joint of hind legs 
white. lutescens. n. sp. 
Abdomen metallic green at the 
base, purple posteriorly ; 
legs brilliant golden and 
green; fore metatarsus and 
1st tarsus white . splendens. Wiedemann. 
(aaaa) Xo caudal tuft visible. 
Abdomen blue and green; 
thorax brown, with a blue 
median and lateral stripes; 
1st and 2nd fore tarsi with a 
white band; mid with 3rd 
white, also 3rd in hind legs... ferox. Wiedemann, 
C. Tarsi not banded with white. 
Xo caudal tuft. 
Thorax brown, with bronzy and 
green scales, green ones 
lateral; abdomen with me¬ 
tallic olive-green scales, 1st 
segment blue, venter golden longipes. n. sp. 
1. Megarhinus separatus. Arribalzaga, 
(Dipt. Arg. p. 33 (1891).) 
(Fig. 27, PI. VII.) 
Thorax brown, with spindle-shaped, metallic bronze scales, 
azure blue over the wings ; abdomen violet, purple and coppery 
red, caudal tuft red and black ; legs unbanded in the , in the 
$ the first hind tarsal and part of the second white. 
£ , Head covered with small flat scales, brilliant metallic 
blue in front, duller behind, violet at the sides j eyes with a 
