Genus Megarhinus . 241 
The thoracic ornamentation is, I fancy, the best character in 
this species. 
The description by Wiedemann of the abdomen as steely-grey 
and steel-blue seems inconsistent; but in certain lights, with the 
naked eye, the former hue can certainly be detected on the 
abdomen of Bigot’s 9 specimen. 
12. Megarhinus longipes. n. sp, 
(Fig. 34, PI. IX.) 
Thorax brown, with small bronzy and green scales, the green 
ones lateral. Abdomen covered with metallic olive-green scales : 
venter golden ; first segment pale blue ; apex yellow, with yellow 
hairs. Legs long and rather thick, iridescent, dull yellowish 
and brownish-black. 
9 . Head clothed with flat, golden-brown scales behind, 
pale green ones in front; antennae brown, basal joints small 
and rotund, with greyish sheen; palpi with metallic green 
scales; proboscis coppery. 
Thorax brown, with small bronzy and green scales, the green 
ones at the sides; prothoracic lobes with pale blue scales; 
scutellum clothed with pale brown scales, with golden and other 
reflections, those on the lateral lobe pale blue; pleurae brown, 
with dense masses of pale golden scales; metathorax dark 
brown. 
Abdomen covered with bright, metallic, olive-green scales, 
the venter golden scaled ; first segment with pale blue scales, 
and the apex yellow, with dense yellow hairs. 
Legs long and moderately thick, in the fore legs the bases of 
the femora are yellowish; the remainder of them, the tibiae 
and metatarsi deep steely blue ; the first three tarsal joints 
yellowish-white, the last blackish, in the mid legs much the » 
same; hind legs, with the femora, pale at the base, deep blue at 
the apex, with a pale knee spot; tibiae golden, except at the base, 
where they are dark brown; metatarsus golden-bronzy towards 
the tip, first and second tarsal joints deep purplish-black, the 
apex of the latter joint white, last two joints lost; fore and mid 
ungues nearly straight, equal and simple. 
Wings slightly dusky along the costal border, some of the 
veins with metallic purple scales; supernumerary cross-vein 
some distance nearer the apex of the wing than the mid cross- 
VOL. i. 
R 
