paper on I. purchasi, Maskell, in my hands, I avail 
myself of the privilege of giving some portions of the 
description of the male insect, taken by him “from 
numerous specimens both mounted and living.” 
Prof. Riley states that “ the adult male is a trifle over 
3 mm. in length ” [that is, over the eighth of an English 
inch in length — E. A. 0.], “and has an average 
wing-expanse of 7*5 mm. The general colour is orange- 
red.” The thorax is much marked with black; some 
of the spiracles are black also. “ The legs are also 
nearly black, and quite thickly furnished with short 
hairs. The wings are smoky black, and are covered 
with rounded wavy elevations, making a reticulate 
surface. The costa is thick and brown above the sub¬ 
costal vein, which reaches costa at a trifle more than 
four-fifths the length of the wing. The only other vein 
(the median) is given off at about one-sixth of the length 
of the wing, and extends out into the disk a little more 
than one-half the wing-length. There are in addition 
two white lines, one extending ”... to the tip of the 
wing, the other curving to a point some distance below the 
tip. “ The abdomen is slightly hairy, . . . and is fur¬ 
nished at tip with two strong projections, each of which 
hears at tip four long hairs and a few shorter ones. 
When the insect is at rest the wings lie flat on the 
back.” The head above is triangular, the antennae are 
light brown in colour, and are composed of ten joints, 
of which the first is almost globular, the second some¬ 
what longer, and the third nearly twice as long as the 
first, and the remaining seven joints are of about the 
same length as the third, “ and grow successively a little 
more slender.” 
The above description is taken entirely, either abridged 
or in Prof. Riley’s own words, from his description at 
pp. 480--481, in his Report as U. S. State Entomologist, 
published by the Commissioner of Agriculture of the 
United States of America, 1887. I have only availed 
myself of the privilege of taking such part of this 
description as might be available for general practical 
