158 | Memoirs of the Indian Museum. [ Vor. VI, 
Mr. J. J. Davis, of the Bureau of Entomology, U.S.A., states that he is about to 
publish a complete account of the morphology and natural history, etc. of this insect. 
I find that the Indian insect is identical in all respects with the European and 
the American form, and as the descriptions of these are easily accesssible no further 
morphological account is needed here. 5 
Life-history.—This insect would often be attracted by white clothes and settles 
on them if on the wing. Its ravages to pea crops have been said to be very serious 
in the United States of America, but so far I have not noticed it here in any large 
numbers upon them. Possibly it is controlled and kept in check by natural enemies, 
but there is no doubt that it is a standing menace and might become a bad pest in 
any year favourable for its reproduction. So far it has been sparingly infesting the 
following plants in Lahore and some of them are those not recorded as its hosts in 
other countries :-— 
(I) Alhagi maurorum 22nd February, 1913. 
(2) Melilotus alba April, 1913. 
(3) Medicago sativa (Lucerne) 27th March, 1913. 
(4) Medicago falcatum (Vern. Methe) 13th April, 1913. 
(5) Chanthus dampieri (Glory flower 
or Parrot beak) T2th April) 1913: 
(6) Lathyrus adoratum (Sweet Peas) February and March. 
(7) Dolichos lablab (Sem) 28th August, IQI3. | 
(8) Peganum harmala 3rd March, 1913. 
Natural enemies.—Besides the usual enemies, this species is liable to the attacks 
of the fungus “ Entomophthora aphidi’’ which destroys it in large numbers. Mr. 
G..R. Dutt of the Research Institute at Pusa once sent me specimens from sweet 
peas where the fungus had done particularly good work in reducing it. The infected 
insect first swells up a little, then getting stupefied fixes itself to one side of the twig 
or leaf not favourable for feeding, turns. yellow and later on shrivels up to a scaly 
form. 
Another Macrosiphum sp. is occasionally collected on sweet peas in May. It is 
about the same size as Mac. pisi and resembles it closely in colour, etc. Further, it 
has cornicles which are smooth throughout without any area occupied by polygonal 
markings. But its cornicles are much smaller, conical and hardly reaching to the 
base of the cauda. The description of this form is omitted in this paper. 
Macrosiphum rosaeiformis, n. sp. 
“THE PUNJAB ROSE APHIS.’’ 
Hosts.—Several species of cultivated roses in gardens (Rosa centifolia, R. damas- 
caus, R. moschata and varieties. ) 
Distinguishing characters.-—À large green aphid with brilliant red eyes, clustering 
head downwards, in lines, over the tender shoots or flowerbuds. ‘The size of the 
shoot often appears twice as thick as it actually is, because of their overcrowding 
