\§ 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 colbr, 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 th^ midrib of the leaf in a position for molting. 



•Funkhouser, Philip. Journ. Sci. § D 10 (1915) 370 and 13 (1918) 23. 



