426 RHYNCHOPHORA. 
6”, Elytra with a sharply-defined transverse submedian fascia and a spot 
at the base of the 2nd and 6th interstices; ventral surface densely 
and coarsely albo-squamose . . . ~ oe ew ee ew eh) «Species 4. 
*, Elytra with short streaks at the base and across the middle, and some- 
times a line along the suture ; ventral surface sparsely albo-squamose. 
a’. Mesosternum not hollowed between the coxe . . . . . . . Species 5-8. 
b°. Mesosternum hollowed between thecoxe. . . . . . ~~ ~ Species 9. 
b‘. Basal process of the prosternum not or feebly margined at the sides 
(except in P. nevius), usually flattened ; elytra with or without a white 
spot at the base of the 8rd interstice (in P. octonotata with an 
additional spot at the base of the interstices 4-6). 
d*, Elytra without angular prominences at the apex. 
c’. Anterior femora bi-, the others uni-dentate. 
a‘. Rostrum sharply carinate beneath; elytra with some squami- 
gerous punctures at the base of the 3rd interstice, undulate, 
completely striate . . . 1. 2. 1 1 ee ee ee ~~ 6<Species 10. 
b*. Rostrum not sharply carinate beneath; elytra bare, flattened, 
incompletely striate at the base. . . . . . . + « « ~ Species 11. - 
d’, Anterior femora, and sometimes the others also, with an angular 
prominence or tooth* (the anterior pair serrulate in P. carini- 
pectus). 
c‘, Elytra with three or four spots at the base . . 
d‘. Elytra with a spot or a few scales at the base of the rd inter- 
stice, which is usually widened in front. 
a’. Prosternal sulcus closed behind by a v-shaped ridge ; elytra 
also with scattered white sete . . . . =... «© - + Species 13. 
6°. Prosternal sulcus open behind. 
a’, Elytra also with scattered fascicles of setiform white 
scales... 6 6 ew ee ew ee . oe es «© «+ Species 14, 15. 
o Elytra also with conspicuous scattered white sete. . . . Species 16-18. 
*, Elytra without white sete. 
Species 12. 
7 Elytra incompletely striate near the suture at the base . Species 19. 
6", Elytra completely striate. 
a®. Interstices very finely punctured. . . . . . ~ ~ Species 20. 
b°. Interstices coarsely punctured . . . . . . « ~ Species 21. 
e’. Elytra bare, the 3rd interstice not widened infront . . . . Species 22, 23. 
e’. Anterior femora, and the others also, unarmed. 
f'. Elytra with a spot or a few scales at the base of the 3rd interstice 
(abraded in P. lucens), which is usually more or less widened 
in front. 
c’, Elytra also with conspicuous scattered white sete . . . - Species 24, 25 
d’, Elytra also with inconspicuous whitish setee (often abraded) . Species 26. 
* This character is perhaps not altogether reliable, as some of the species placed under ¢* have 
indications of a small tooth. 
