136 MONOPHLEBUS STEBBINGII. 
black antenne, inserted ventrally and not dorsally, and a black 
proboscis tucked away on the under surface of the body. 
Elliptical in shape, being convex on the dorsal surface, and 
consisting of twelve segmentsin all. Whenrubbed, so as to 
remove some of the powdery material which gives the scale it, 
white appearance, the body is seen to be dark yellow to light 
reddish-brown in colour. As seenon a dorsal view a white 
filamentous edging runs round the contour of the insect when 
alive and unrubbed. Size when fully grown is ? inch long and 
2 inch or a little less in greatest breadth. TheQis apparently 
sexually perfect before it attains its full size, a few amongst 
those noticed pairing being only about 3 inch in length and 
dark brown to brownish-red in colour with no white powdery 
mantle over them. PI. I, fig. 7, shows the wingless female insect. 
Winged @. A small insect with one pair of black wings. 
Antenne long, consisting of from 19g—20 joints, black with the 
joints swollen in the middle and a single circular row of longish, 
stiff, bristly hairs arising from the thickest portion of the joint. 
The antennae, as ordinarily seen on the insect in life, appear 
to be white and feathered ; this is simply due to the fact that 
the hairs become covered with the white powdery substance 
with which the dorsal surface of the wingless 9? is covered. The 
body is red and flattened and terminates in three abdominal 
appendages on either side of the posterior end. The male has 
no mouth parts. It is very active and flies about freely. Length 
4th inch, Wing expanse 4 inch. PI. I, fig. 8, shows the male 
insect of Monophiebus dalbergiz towhich that of MZ. Stebbingit 
is very similar. 
Life History. 
The young @? larvae are to be found early in January on the 
leaves of the sal and in dry years, such as the present (1902), 
they doubtless first appear in November or December. They 
are usually clustered on the midrib both on the upper and 
underside of the leaves, but more usually the latter, their pro. 
bosces being buried in the tissue of therib. Soon after losing 
the white hair, with which they apparently start life, the little 
scales undergo their first moult and the little whitish papery 
cast skins can be found stuck to the leaves by the copious sugary 
