696 Wisconsin Academy of Sciences, Arts and Letters. 
eyes; on tlie very short pronotum a small prominent pair; on 
the mesothorax a shallow impressed median line, with a long 
wart on either side; at the posterior extremity of this segment 
is a small lighter colored area, greenish or yellow. Abdomen 
bright green, or, in older specimens, yellow. Legs yellow, ex¬ 
cept fuscous coxae. Anterior wings snow-white, ciliated with 
light and dark brownish, with brownish scattered spots, due to 
the pubescence of that color on the veins, these spots tending, at 
the apex, to be arranged in transverse rows. In the older in¬ 
dividuals, the neuration is distinctly brownish, and, as the 
pubescence is often almost entirely gone, the appearance of the 
wings is quite different. Posterior wings niveo-hyaline, ciliated 
with white. 
In the male the 9th dorsal segment is much elongated, with 
two small lobes projecting from beneath the tip. The superior 
appendages are long, broader at the distal end, where they are 
thickly clothed with yellow hairs. A pair of appendages, which 
may represent the intermediates, curve upward, backward, and 
finally downward, ending in a broad, roundeji portion, convex 
above. A penis cover, or penis sheaths, since there are two 
parts, extends straight out behind from the base of the interme¬ 
diate appendages, each piece thin, almost transparent, flattened, 
with a pointed end. Beneath these the large penis may be seen, 
somewhat obscured by laige hairs beneath. The inferior ap¬ 
pendages point upward at an angle of about 45°. They are 
broader at the distal end, with a rounded lobe extending inward, 
long stiff hairs standing upright on the outer border, the lower 
outer surface clothed with yellow hairs. 
As suggested by Ulmer (1907), this may be only a variety of 
L. exquisita Walker. I have carefully examined the males of 
the latter and do not find even the differences in the genitalia 
mentioned by Ulmer. The wing venation varies somewhat, the 
stalk of the 4th apical cell being shorter in exquisita, and the 
cross-vein between the upper branch of apical fork 5 and the 
vein above, being farther from the tip than in uwarowii. The 
thorax is yellow, and the antennae a trifle longer also. I have 
taken only five specimens of exquisita , all males, and these at 
the same time of the year that the others appear. The inteiv 
