182 Memoirs of the Indian Museum. | [Volz Wale 
The anal and genital plates as well as the ventrai surface is similar to that of 
the apterous female. 
Rudimentary gonapophyses large, three in number. 
Legs much darker, specially at the coxae, distal femora, tibiae and tarsi. There 
is a black band stretching between the third coxae. 
Mesosternal bosses black, shining and four-lobed. 
Rostrum reaches to the second coxae. 
Measurements :— 
Body i ie 22 1°50 X 202: mm: 
Antennae at =. DIS le 
Wing expanse .. 5:30—6:4 mm.; wing 2°95 XI‘I0 mm. 
Cornicle a & 0, mm. 
Cauda Se ze D OM AE ey 
Alate male. —Remarkably similar to the alate female in its structural characters, 
but it can be readily made out by its yellow colour and somewhat slender body. The 
genitalia of course is the chief distinguishing character. = 
Head, antennae, band on prothorax, mesothorax, legs, cornicles and genital 
armature all black. 
The antennae in one of the larger specimens has the following proportions : — 
JOB IV. Vi VI. 
22 II IO 6422 
Teneths.: 0:35 0°I19 0-16 o'10+0°35 mm. 
The spur and the 3rd joint are equal; relatively to the body the antennae are 
longer than those of the alate female. | 
The sensoria are exactly of the same form and number on the 3rd and 4th articles 
as the alate females ; in this character they differ from the males of other plant-lice, 
in which the males always possess many more sensoria. The additional sensoria 
(probably for want of room, as these joints are already crowded) are placed about 
6-Io on the 5th, and about 3 on the 6th. 
Wings smaller and narrower than those of the alate female; the membrane has 
a little dusky hue; relatively to the body they are fairly ample, but not voluminous. 
Cornicles of the same type, only much smaller. 
The cauda, raised upwards by the reduced anal plate becoming vertical, is very 
small and appears about the same size as the conical penis in the centre of the usual 
kind of genital armature. 
The males vary a good deal in size; some are very small, others fairly large and 
nearly equal to the alate females. 
The measurements below are from a large specimen. 
Body se es .. 1°50 X0°55 mm. 
Antennae a 1:25 mm. 
+ Wing expanse .. 55 mm.; wing 2°5 xI’Io mm. 
Cornicle i 3 2 2 0:T0-mmE 
Cauda ke Ne ROTER 
9) 
