248 : Memoirs of the Indian Museum. [VoL. VA, 
Rostrum very short, just reaching a pit between and in front of the second pair 
of coxae. The short beak is probably correlated with the sensitive nature of the 
insect ; some other Aphids that also have a similar beak resemble it in the habit of 
dropping down at the slightest alarm. 
Measurements : — 
Body Se SÉRIE ALLG OFF OS anata 
Antennae .. VASE F0 5020 nam! 
Cauda LÉ de Rice Sohn NE 
Cornicle .. ee 2005 in d'armeters 
Alate viviparous female.—The alate female has often a larger amount of white 
flocculence, specially on the head, from which some pieces flow towards the front and 
others backwards and upwards; from the sides two very long and thick masses pro- 
ject backwards along the margin of the wings and extend beyond them like a tail. 
There is a predominance of a dark colour over the greenish yellow (or pink in Sep- 
tember, October and November). The size of the individuals varies a great deal, 
particularly those kept in rearing pots under glass chimneys which are distinctly 
smaller in size. 
Head black ; front with two black wax-glands with a groove between as shown in 
the figure. Two more glands situated behind between the dark red eyes. 
Antennae long, about the size of the body, ringed with black at the joints of the 
two articles ; the third is the longest, black in the middle, and the 6th has a very 
short spur. 
Length proportions :— 
00% IV. We VIE 
33 16 15 12 +3 
Actual lengths .. ‘55 ‘25 "24 ‘24 mm. 
Sensoria about the middle of the 3rd article, the black portion with from 9 to II 
sensoria. They appear to go in pairs ; the number in larger specimens may even run 
up to thirteen. The third joint in such cases is longer. All the sensoria are circular 
and placed in one line. 
Prothorax similar to that of the apterous female ; two pairs of glands form a single 
transversely elougated band ; the band is darker than the prothorax and raised above 
its level. Two glands present on the rounded lateral side, but there are no lateral 
tubercles. 
Mesothorax with shining black muscle-bosses ; on the dorsum and sides a con- 
spicuous black stigmal spot. The lateral lobes of the muscle-bosses are again sub- 
divided by a longitudinal line. Those towards the inside are light in colour and smaller 
in size. 
Wings iridescent, long and slender, stigma smoky ; all the veins are clouded with 
' [The primary sensoriae have a distinct hair-rim; the secondary sensoriae show an exceedingly 
short one. P. v..d. CA 
