1918. | ~  BasHamBar Das: The Aphididae of Lahore. | 217 
confused there with A. malvae (Koch). But as no account of it appears to exist any- 
where I consider it to be an undescribed species. There is a very close affinity 
between these two plant-lice, and I have consequently named it Aphis malvoides, sp. 
nov.' 
Aphis durranti, sp. nov. 
Hosts.—Durranta sp.; Vitex nirgundo ; Colocasia, etc. 
A pterous viviparous female.—Body of small size, about the same as A. malvordes. 
Colour yellowish-brown, without any mottling; in fully developed specimens the 
thorax, edges of the abdomen and the post-cornicular segment are dark green. 
Head dark brown, concolorours with the basal antennal joints; front convex. 
Eyes dark red. 
Antennae on inconspicuous frontal tubercles. The spur is more or less subequal 
to the 3rd article; sometimes it is smaller and sometimes a little longer. 
Proportions :— : 
; ; IE IV. Ne Wale 
14 9 8 5+14. 
Lengths .. 0°24 0'15 0°I4 0°08-+0'24 mm. 
The prothorax bears lateral tubercles and a black stripe. 
The mesothorax and metathorax are large; on their lateral sides both are marked 
by rounded elevations of black pigmentation. This is quite a characteristic feature, 
and under a high power of the microscope the fine irregular meshwork of lines over the 
body assumes here the form of more or less circular facets, like those of the wax-glands 
in some other genera. Each mass of these circular facets looks like a huge gland. 
Similar but very much smaller facet-groups are to be seen on the abdominal segments 
as well. Below these groups and in front of the attachment of the leg is situated a 
strongly developed tubercle. 
Abdomen sparingly pruinose; lateral tubercles of first and seventh segments 
rather small; on others they are absent. 
Cornicles long and stout; cylindro-conical, black ; they reach to the base of the 
cauda. 
Cauda ensiform, black at apex; there is a slight constriction between the 
narrow base and oval apex : it is two-thirds the length of the cornicle. 
Anal plate black, elliptic. 
Genital plate dusky. 
Legs normal, with tibial points, tarsi and coxae black; the rest brownish. 
Rostrum Be it reaches almost to the third coxae; lost joint over one and a 
half times the one before it. 
' [The name Aphis malvoides is already preoccupied for a greenish Aphid, occurring chiefly on 
Compositae in Java (see v. d. Goot, Zur Kenntnis der Blattläuse Java’s p. 96). I would therefore pro- 
pose changing the name of this little Aphid into Aphis malvacearum, nov. nom. I have some doubt 
that this species may ouly be a small variety of the polyphagous Aphis gossypit, Glov. P. v. d. G.]. 
