202 Memoirs of the Indian Museum. | [Vor. VI, 
The ‘‘return migrants’’ possess powerful wings and larger bodies than the spring 
migrants. The number of sensoria on the antennae is also greater. 
The progeny of these develop into oviparous females, while the males wait till 
they are ripe. After fertilisation, or if no males are available even without it, one or 
two eggs are laid by each egg-bearing female. This takes place in the latter part of 
December or in January. These are the eggs that hatch in February and March to 
start fresh colonies. 
Although sometimes rather badly attacked the pear being a large tree with 
plenty of foliage does not suffer much by the attacks of this Toxoptera. In some 
cases, moreover, if the Aphids leave off a little early the leaves straighten out again, 
but generally they remain more or less conduplicated till they fall. i 
Toxoptera is a small genus, comprising about half a dozen known species from 
different parts of the world. None has been recorded so far as affecting pears and 
plums in this way. I believe the species to be new and have named it Hunjabipyri 
after its chief host in the Punjab. 
Genus Aphis (Linn.; Mordw.; van der Goot). 
In the plains I have come across only about ten species belonging to this genus. 
A.—General colour yellow. 
(I) Body deep rich yellow; eyes, cornicles cauda and anal plate conspicuous black. 9-12 
sensoria in a line on article III. 
Host Calotropis and other Asclepidaceae. A. neri (Boyer). 
(2) Lemon yellow to greenish-yellow intermingled, others quite green; cornicles and cauda 
black; 4 or 5 to 7 or 8 sensoria on article III. 
Hosts numerous, chiefly Malvaceae, Cucurbitaceae, Solanaceae or any other plants. 
: Malviform group. 
(3) Light or almond yellow; cornicles small and dusky. Sensoria 9-12, scattered all round; 
wings with deeply-marked veins. 
Host Sorghum or Panicum sp. A. sacchari (Zehnt.). 
B.— General colour dark pink. 
Host Sorghum and Panicum. A. sacchan (Zehnt.). Pink variety. 
C.— General colour green. 
(4) Bluish green to light greenish. Body elongated ; small, black cornicles surrounded by dark 
areas at base. Sensoria 15-18 on article III, 4-5 on IV. Infests rolled-up leaves of 
Graminous plants like wheat, maize, sorghum, etc. À maidıs (Fitch). 
(5) Body dark or dull greenish; may be mottled, intermingled with yellow. Hosts numerous. 
Malviform group. 
(6) Body of apterous female oval, uniform, livid green with concolorous cornicles and cauda ; 
7-10 sensoria on article III, o-4 on IV. 
Host Nasturiti sp. (a cruciferous weed near water-courses). A. nasturtii (Kalt.) ? 
D.—General colour black. 
(7) Body dull black to dark greenish; post-cornicular segments striped; 15-18 sensoria on 
article III ; forms pseudo-galls on leaves, etc. 
Host Solanum nigrum, Rumex and Cnicus. A. rumicis, Linn. 
(8) Body in adult apterous female with a large shining black spot on back; 5-6 sensoria on 
article III. 
Host mostly Leguminous plants. A. medicagims, Koch. 
