( 216 ) 
Female Head .—Completely covered with racquet-shaped flat scales so 
characteristic of this genus; along the orbital margins the scales are bluish- 
white the white or the blue predominating as the direction of the specimen 
with respect to the light is altered, and laterally this line of scales 
broadens out into a distinct lateral patch. All the area surrounded by the 
b ue scales is covered with purple-bronze scales. The depth of the line of 
blue scales seems to vary a good deal in different specimens. The type is as 
described but in other specimens nearly the whole of the upper surface of 
the head is covered with bluish-white scales the dark scales being confined 
to the nape. The dark scales are metallic and the colour varies a ^ood deal 
according to the amount and direction of the light in some lights they appear 
a rich deep blue. There are no upright forked scales. Orbital and 
vertical bristles dark brown. Basal joint of antenna pale ochre-yellow, in 
some specimens more of an apricot colour, without scales, remaining 10’ints 
dusky-brown with white tomentum and dark brown verticils. Clypeus 
pale yellowish-brown. Palpi very short closely applied to the clypeus which 
they resemble in colour clad with pale grey scales and numerous hairs. 
Proboscis about as long as the abdomen swollen at the end and scaled with 
dark purple-brown scales. 
Thorax. Prothoracic lobes dark brown with racquet-shaped flat scales 
covering the. outer face which vary from a pearly-bluish-white to azure-blue 
as the direction of the light changes. Thorax patchy, in parts dark brown, 
m parts paler muddy-brown, clad with dark and lighter brown narrow^ 
curved scales and on either margin in front of the wing a line of lanceolate 
pale blue scales, bristles dark brown. Scutellum light brown thickly clad 
with purple-brown racquet-shaped scales, mid scutellar bristles about four 
m number but variable, probably because in some specimens one or more 
have been knocked off. Pleurae pale with slight yellowish tinge with a 
distinct line of bluish-white flat scales crossing each pleura horizontally just 
a ove the insertion of the coxae. \\ ings clad with dark brown scales which 
are not very typical in shape. The median scales are rather narrow 
spatulate scales with square ends, the laterals on the second long vein are 
clavate those on the third and fourth are lanceolate rather than spindle- 
shaped. Coxae colourless clad with a few broad flat colourless scales, the 
rest of all the legs is covered with dark dull brown scales; ungues equal 
and simple. 
Abdomen. Light muddy-brown, dorsally clad with dark brown scales, 
laterally there are basal white spots and ventrally all the segments except 
the fourth are clad with white scales. The fourth is clad with brown scales 
at its base. 
Male. The male differs in the following points from the female: the 
antennae are plumose, the enlargement on the proboscis is more marked and 
occupies fully one-third the total length instead of about a fourth as in the 
female, and on each fore leg the metatarsus is very short the joint beino - 
only about half the length of the succeeding joint and about one-third the 
length of the tibia. This itself is a very unusual arrangement. Immediately 
beyond the base of this metatarsal joint it is enlarged on its anterior surface 
gradually forwards for about half its length when the enlargement stops 
abruptly leaving a projecting edge exactly as if a notch had been cut in the 
joint. Some long dark brown narrow linear scales stand out on this 
