16 
Philippine Journal of Science 
1919 
recognize specific differences sufficient to admit C. posticus Buck- 
ton and C. bucktoni Distant as distinct species. It has already 
been noted in previous papers 2 that C. horrificus shows con- 
siderable variation in size and in color, some of which conforms 
to Buckton’s descriptions and figures for his supposed new 
species. I am still unconvinced that they are distinct. 
In addition to the adults recorded above, Mr. McGregor sends 
a nymph of this species, which is apparently in the third or 
fourth instar, taken with the adults at Culasi on May 27 and 
sent to me on a section of the leaf on which it was captured. 
Since the immature form (Plate I, fig. 1) of this insect has 
never been noted in literature, it seems advisable to include a 
brief description, as follows: 
Entirely yellow (specimen preserved in alcohol) ; length, 4 
millimeters; width between humeral tubercles, 1.5; height from 
apex of clypeus to top of metopidium, 2.8; roughly sculptured; 
densely pubescent; pronotum showing a suprahumeral tubercle 
on each side and a median dorsal posterior process which ex- 
tends backward over the mesothorax but does not reach meta- 
thorax. 
Head longer than broad, roughly pubescent, without tubercles, 
ocelli not visible, eyes large. 
Thorax distinctly divided into segments; prothorax rough, 
densely pubescent, metopidium perpendicular, pronotum showing 
two strong tubercles representing the suprahumeral horns, 
posterior process extending backward over mesonotum but not 
reaching metanotum; mesonotum with a small tubercle on each 
side of median line; wing pads well developed, extending to 
first abdominal segment; entire thorax yellowish and densely 
pubescent with grayish hairs. 
Abdomen showing nine segments, each segment slightly nod- 
ulate above with tufts of bristly hairs and extended ventro- 
caudad at lateral margin with edges of segment pilose; anal 
tube short, blunt, slightly upraised. 
Legs flattened, first two pairs somewhat foliaceous, very 
densely pubescent; tarsi well developed, three joints distinct; 
claws swollen and heavy. 
Judging from the development of the pronotal tubercles, the 
length of the wing pads, and the invisible ocelli, this nymph is 
in its third instar. It was attached by the first pair of legs 
to the midrib of the leaf in a position for molting. 
8 Funkhouser, Philip. Journ. Sci. § D 10 (1915) 370 and 13 (1918) 23. 
