APHIDS. 
743 
gall-insects and free-living species, besides those recorded below. (Plate 
LXXX.) 
Kieffer has described Phacosema gallicola as causing a gall on the 
leaf of Cinnamomea sp. in Trichinopoly (Zeit. Wiss. Insectenbiol. II, 
388) making a new sub¬ 
family, Phacosemince, for 
this and for Phacopteron 
lentiginosum, Buckt. The 
family is usually divided 
into Psyllince, Aphalori- 
nce and Triozince , ac¬ 
cording to the venation. 
Psylla isitis, Buckt-., was 
described from the full- 
grown nymph of an in¬ 
sect said to destroy in¬ 
digo. The species has 
been found on indigo 
since then and causes the terminal shoot and leaves to curl, all growth 
ceasing in bad cases. Trioza (Psylla) obsoleta, Buckt., is recorded on 
Diospyros melanoxylon in Thana (I. M. N., V, 35). Psylla cistellata, Buckt., 
is referred to (I. M. N., Ill, 13) as causing galls on mango shoots in 
Dehra Dun. We reproduce the original figures of this species, which 
has been found sparingly in Behar also. Phakopteron lentiginosum , 
Buckt., was described from species regard from galls on Garuga pinnata 
in Poona (I. M. N., Ill, No. 5, p. 18). 
Kieffer describes Indian gall-making Psyllids (Ann. Soc. Bruxelles, 
1905, XXIX, p. 160, etc.) : Cecidopsylla schimce, Neotrioza machili, 
Ozotrioza styracearum, 0. laurienearum, Pauropsylla flcicola , P . globuli 
and Psylla cedrelce, are the new species. 
Aphid/e.— Plant lice, Green fly. 
Small insects, often wingless, the tarsi with two 
joints, the abdomen usually with a pair of abdominal siphons. 
These insects are readily distinguished by the rounded form and pair 
of siphons. They are small, rarely more than one-tenth of an inch long, 
and coloured in dull yellows, greens and black. The head is distinct, 
Fig. 516 -Psylla obsoleta, Buckt. 
