1916. ] P. vAN DER Goor: New Indian A phides. 3 
its whole length about 20 sensoriae; these are broadly oval and 
occupy nearly half of the antennal circumference. 
Rostrum slender, reaching to the third pair of coxae. 
Siphunculi very long, about ? of the whole length of the 
body, cylindrical, thin, with numerous fine bristles. Cauda obso- 
lete, the last abdominal segment broadly rounded, without a small 
point at the apex. Rudimentary gonapophyses apparently 3. 
Wings with the same venation as in the genus Greenidea, with 
the media II curved. Hooking-hairs 2. 
Biology.—The aphids described above were collected on a 
jungle creeper. Only a number of nymphs and a few winged indi- 
viduals were caught. 
Locality.—Kurseong, Darjeeling (4700 feet). 
Types in the collection of the Indian Museum, Calcutta ; 
labelled no. 9620/19. 
NOTE. 
In the genus Trichosthhum (Perg.), v. d. G. I include those 
species that differ from Greenidea, Schout., in having the caudal 
segment broadly rounded, not protruding into a small point like 
the species of the genus Greenidea. 
Pterochlorus tropicalis, sp. nov. 
A pterous viviparous female. 
Measurements. 
Length of body 5 AO} min 
Breadth of body Pe OEOON, ee 
Length of antennae Seo Oe ES 
Siphunculi (diam.) i ee, Oc Lace 
Colour.—Head and prothorax brownish-black ; the rest of the 
body greyish, with four longitudinal rows of minute black dots 
on the dorsum. Eyes, antennae and legs black. Siphunculi sur- 
rounded by a broad black ring ; caudal segment brownish-black. 
Morphological characters '.—Body broadly oval, slightly arched, 
clothed with numerous fine, short hairs. 
Antennae half as long as the body, six-jointed, with numerous 
short hairs; relative lengths of the last four joints about as: 55. 
23, Toy LE: 
Distribution of sensoriae on the different joints mostly as fol- 
lows: IIIg IVs Vi VI1 (+4). ‘The secondary sensoriae are round 
and small. Processus terminalis fairly long, about 4 of the length 
of the entire sixth joint. 
Rostrum long, nearly reaching halfway to the ventral part of 
the abdomen. 
Siphunculi only very slightly protruding, nearly reduced to 
pores. Caudal segment not constricted at the base, nearly obso- 
lete. Rudimentary gonapophyses 3. 

t Notes from specimen in alcohol. 
