CEYLONESE APHtDES. 187 
also quite different in the two species (see tigs. 5 and 6) ; and the 
radial is slightly more remote from outer cubital branch. 
O. bambusce feeds in Ceylon on Dendrocalamus giganteus and 
in India on Bambusa arundinacea. 
Ceratopemphigus, n. g. 
Amongst the Aphides which Mr. Green submitted to me I found 
a form, apparently new, with the mention “from large foliate 
galls on undetermined shrub,” a specimen of which was also sent, 
which I here figure (fig. 9). This species was only represented 
by the winged female and its nymphs, but its characters are suffi¬ 
cient for considering it as a new one, belonging to an undescribed 
genus. This I have named Ceratopemphigus , as it has some resem¬ 
blance to the Ceratovacuna of Zehntner. I take great pleasure in 
naming the species after my esteemed colleague, Dr. L. Zehntner, 
from whom we have such interesting reports on Aphides of Java. 
The genus may be characterized as follows (from the winged 
form) : “ Head furnished with two divergent short and obtuse 
teeth (winged female ; they are very probably longer in the 
apterous form, as in the case of Oregma). Antennae six-jointed, 
sixth joint with a short appendix ; joints 3 to 6 with conspicuous 
rings in the winged form. Eyes with the appendix hardly 
developed. No cornicles. Cauda obtusely rounded. Anterior 
wings with the two oblique veins arising from the same point; 
the cubitus not forked, obsolete at base, but directed towards 
the common base of the oblique veins. Posterior wings with the 
cubital vein apparently trifid at apex, the oblique veins springing 
from the same point.” 
IV— Ceratopemphigus Zehntneri, sp. n. 
Winged Viviparous Female . 
Head (fig. 7) transverse ; vertex slightly convex, furnished with 
two obtuse stout teeth, the distance between which is shorter than 
from basis of antennae. Eyes black-brown, large, with an obtuse 
convex appendix posteriorly. Three ocelli: one on each side near 
anterior margin of eye, the third median, beneath the frontal teeth. 
Antennae (fig. 7) longer than one-third of the body, robust; first 
joint short, slightly longer than or equal to the second ; third 
the longest; fourth longer than half of third ; fifth subequal to 
fourth ; sixth (without the appendix) slightly longer than fourth ; 
the appendix stout, half the length of second joint: e.g., 1% 
4*-4*5, 2*5, 2*5, (2*5), (0*5); second joint narrower at end, the 
following joints subcylindrical; third with 8-10 conspicuous 
elevated rings ; fourth with 4-6 ; fifth with 4; (sixth) with 2-4 
