973 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. VIII. 
NOTES ON INDIAN APHIDKS.* 
By G. B. BUCKTON, F.R.S. 
Bur little attention hitherto has been given to the tropical Aphides 
of the old world. Any addition to our knowledge of the species which in- 
habit British India doubtless will prove of interest, both as being connected 
with scientific entomology and with agricultural economy. 
Hitherto these Homoptera have been regarded as chiefly inhabiting the 
temperate regions of the world, but there are reasons for believing that observ- 
ation only is needed to prove the existence of diverse species which control 
the vegetation which flourishes under the equator. 
The Aplus which attacks the bamboo (Bambusa arundinacea) of Dehra Dun 
hardly accords with any described European species or even genus, Amongst 
many hundred specimens sent to me by Mr. Cotes, I was unable to find a single 
winged individual—a circumstance which, for the present, prevents a complete 
diagnosis of the species, since the wing venation is of high importance for 
classical grouping. The characters of the bamboo Aphis, however, are 
sufficiently distinct to justify,in my opinion, the erection of a new genus, 
notwithstanding that the diagnosis at present can refer only to the apterous 
viviparous female. 
Genus Oregma (from ’opéyeiv to protrude), Buckton, Body globose. Vertex 
conspicuous from the projection of two straight horn-like processes. Corni- 
cles small and conical. Cauda inconspicuous, often tufted with numerous 
sete. Rostrum exceedingly short and rising from between the first coxe. 
Oregama bambuse, Buckton. Body globose, less soin the immature forms. 
Corrugated and constricted into segments. Vertex with two cornua. Eyes 
very small. Notum narrow. Rostrum very difficult to see, rising from the 
underside of the thorax, much asin Coccus. Antenne about half the length 
of the body, obscurely five-jointed and ending with a nail-like process as in 
Lachnus. Legs short. Tarsi with two articulations. Colour greenish-brown, 
more or less mottled with black. Many of the specimens preserved in weak 
spirit were quite black. 
Size 0°070 x 0-050 inch. 
Clusters on the upper surfaces of the bamboo at Dehra covering the foliage 
of the plants with its sooty-black excretion, thereby doing some injury. 
The winged female and the (apterous ?) male are undescribed. 
The general appearance of this insect may suggest some affinities both with 
the genus Lachnus and the genus Chaztophorus ; but the small size of the 
insect, the short legs, the peculiar front, and the position of the very short 
rostrum will eliminate it from the first genus, whilst the non-tuberculose and 
slightly hirsute characters of the abdomen, &c,, will separate it from the 
latter. 
* Reprinted from Indian Museum Notes with the permission of the Trustees. 
