FORT BASHAMBAR Das: The Aphididae of Lahore. 243 
not so broad at the base, and the network of anastomosing lines extends much nearer 
the base ; there are fewer circular lines. The length is a little greater than the width 
at the base; smaller than the cauda. 
The cauda and anal plate are of the same form as in the apterous viviparous 
female. 
Rudimentary gonapophyses four ?.' 
Legs longer and dusky. 
Rostrum up to a little beyond the 2nd coxae. 
Measurements :-— 
Length = ie ..  I’05—I'45 mm. 
Breadth 33 oe .. 0°45—0'65 ,, 
Antennae à =e .. O0‘80—0:96 ,, 
Wing expanse .. x a ON 
Wing i u Mob oO, 
Cornicle “ar ba .. 0'080—0'095 mm. 
Cauda AG 2% oe.) Of) nm! 
Systematic.—This small pretty Aphid of Salix evidently belongs to the genus 
Eichochaitophorus, recently founded by Essig to receive a populous Californian species 
(Pom. College Jour. Entom., May 1912). 
So far there is only one species in the genus and I add another from India. The 
Californian insect is very variable in all its structural characters and so is the Indian 
one. It would be quite possible in some cases on a cursory examination to confuse 
specimens of the two species mounted in Canada balsam with one another. But the 
main points of difference are the smaller size and different host of the Indian insect. 
The green pattern on the back is also different as well as the length proportions of the 
antennal articles. The number of sensoria in the American insect ranges from 3 to 9 
while in the Indian insect there are from 2 to 5 only. The posterior wing in most cases 
has only one oblique vein, though occasionally a second one is present either wholly 
or in part. | 
The generic characters in the form of the cornicles, cauda, anal plate and the 
presence of a row of short hooked spines or hairs on the posterior border of the stigma 
are all alike. 
The species is distributed over the plains of Northern India and may be collected 
from March to September, on the banks of streams and canals that branch from the 
main rivers. The indigenous home appears to be the Himalayas from where rivers issue 
and spread the species in the plains along with the host-plant. Near hills it is more 
abundant and has been observed at Saharanpur, Jammu, Rikhikesh, etc. I have for 
this reason called it Eichochaitophorus himalayensis, sp.nov. 
Life-history, etc.—Aîfter the rains, in September, the leaves of Salix spp. begin to 
be attacked very severely by a rust, Puccinia Kuui (identification by Dr. Butler, 
Pusa). The Aphid, also, not getting sufficient nourishment leaves this host and prob- 
! See footnote, p. 241. 
