178 Memoirs of the Indian Museum. [Vor VE 
The apterous viviparous females begin to come out about the middle of Septem- 
ber when the rains are quite over and the young plants are ‘‘ repotted ’’ and 
““dressed up ’’ with supporting sticks and kept in the sun. Soon after this the alate 
generation is produced, which migrate, flying off in the afternoon, to disperse the 
species. 
Throughout the following months of October, November and December alate 
and apterous females are born promiscuously. The flowering period of Chrysan- 
themums is over and a few fresh shoots sprout before January. ‘The plants generally 
about this time are either pulled out and kept in a heap or allowed to stand in the 
pots for the sake of shoots, which are ultimately removed by cutting them off from 
the parent plant. The Aphids also leave the old leaves with diminished nutriment 
for these growing shoots. They continue reproducing up to March, and in shady 
moist places or if kept protected in the laboratory even up to April. 
They entirely disappear later, many of them being devoured by predaceous 
insects. How they tide over the hot summer months from April to September has 
not been yet found out, but the matter is under investigation. 
So far no other alternate host has been discovered, and it is probable that the 
whole life-cycle is passed on Chrysanthemums. It is quite possible that at some 
period during winter the true sexes are produced which deposit the usual kind of 
eggs, but no definite information exists so far. 
Insect enemies.—Three species of small ladybird beetles of the genus Scymnus 
keep an efficient control over its undue multiplication, and equally serviceable in 
this connection are the small ‘‘ Pseudo Syrphids,’’ whose blind larvae are seldom 
absent where the Aphid is to be found. 
The only internal parasite bred from this Aphid is the small Chalcid, Apher 
sp., which turns it jet-black. 
Systematic.—The insect is evidently new to Science and possesses such distinctive 
characters of its own that it is very difficult to connect it, even remotely, with any 
of the existing Aphidine genera. Maculation of the wing veins is seldom met with in 
this tribe and capitate hairs are only present in some species of Myzus and Phorodon, 
but entirely absent in what may be called ““ Siphocoryne-like genera.’’ Slight clavation 
of the cornicles is known to occur occasionally in Myzus, but the total absence of well- 
defined frontal tubercles at once separates this Chrysanthemum Aphid from Myzus. 
In the structure and relative length of the antennae, along with the form of the 
cornicles, this Aphid has a considerable resemblance to Rhopalosiphun berberidis 
(Kalt). For the latter Walker once proposed a new genus Liosomaphis (1868) and 
Wilson (1910) has recently attempted to revive it. But the Berberis Aphid is now 
rightly considered to be a good Siphocoryne because it lacks secondary sensoria on 
the antennae of the apterous female. 
It was at first very tentatively suggested by me to group these two insects 
together, but after examination of specimens from Europe there is little doubt that 
they are widely separated from each other. 
In view of the combination of many unusual characters possessed by this Lahore 
