1918.] BASHAMBAR Das: The Aphididae of Lahore. 259 
Lach. viminalis of the willow. Buckton says that a dorsal horn-like process is present 
in the former, while in the latter “it is restricted to the apterous female.’ This is 
a mistake as the tubercle in Lach. viminalis is present in all stages; Buckton was 
evidently misled by the name of the wrong host being supplied to him. — 
I have had the opportunity of examining a part of this material in Calcutta and 
I found that in the same phial were also included a few apterous and young females of 
a peach Aphid, described below as a Tuberodryobius, which is altogether a different 
insect. I have therefore placed Lach. fuliginosus (Buck.) among the synonyms of 
Tuberolach. viminahs. 
Tuberodryobius persicae (Cholodk.)' 
(Clouded Peach-stem Aphid.) 
(Vernacular, Aru ka Tela). 
Hosts :— 
(I) Prunus persicae (peach).—Vernacular, Aru. 
(2) Prunus communis or domesticus (plum).—Vern. Alucha. 
(3) Prunus armenica.—Vern. Khurmani. ‘ 
(4) Prunus amygdalis (almond).—Vern. Badam. 
Distinguishing characters.—One of the largest Aphids of the plains, infesting the 
main trunk and branches of the fruit trees named above, more particularly the peach. 
Big patches numbering thousands of individuals cover the branches in lengths varying 
from a few inches to yards. If one stands beneath an infested branch the ‘‘ honey- 
dew ” falls like a gentle shower of rain, trickling along the lower parts of the plant it 
gives it an oily appearance; the plant later turns black from the growth of a sooty 
fungus (Capnodium). The vegetation below is quite smothered and blackened. 
Numerous ants, bees, flies, wasps and other ‘‘ honey-seeking ” insects gather about 
these trees which are conspicuous from a distance in early winter and spring. 
The apterous insects are variegated in colour, to the naked eye appearing like 
small castor-oil seeds; the colours are grayish-white and dark reddish or pitch black 
intermixed. . 
The most prominent parts are the two rows of median dorsal tubercles, two very 
large conical and black cornicles and many black spots in rows. The mesothorax is 
covered with whitish pulverescence and similar gray areas are noticeable in front and 
behind the cornicles. The small antennae, long red-brown legs, silvery white ventral 
surface showing a huge rostrum in the middle, rather slender wings with deeply 
pigmented black areas are all characteristic. 
| [Mr. Das having apparently forgotten to give a summary of the characters of his new genus 
Tuberodryobius, 1 will for completeness sake add it here. 
Genus Tuberodryobius, Das. (Type: Lachnus persicae, Cholodk.). 
Morphological characters. Body large, pilose, with 2 rows of distinct dorsal tubercles on the 6 fore- 
most abdominal segments. 
Other characters are similar to those of Pterochlorus, Rondani, P.v.d.G.]. 
