143 



F. Rostral scrobes slightly visible from above, 

 basal, vertical, and sulciform. 

 G. Club of antennae 4- jointed ... ... Eucorynus. 



GG. Club of antennas 3- jointed ... .. Ecelonerus. 



FF. Rostral scrobes quite invisible from above. 

 G. Rostral scrobes distinctly sulciform. 

 H. The rostrum forms a perfectly even 



surface with the head ... ... Entromus. 



HH. The rostrum is on a different plane 



from the head ... ... Epargemus. 



GG. Rostral scrobes foveiform. 

 H. Metasternum not extremely short. 



I. Antennas notably shorter than head 



and prothorax. 

 J. Joint 9 of antennas scarcely wider 



than 8 ... ... ... Enspondus. 



JJ. Joint 9 of antennas as wide as 

 joint 10. 

 K. Antennal club compact ... Tropideres. 



KK. Antennal club loosely articu- 

 late ... ... ... Apatenia. 



II. Antennas considerably longer than 



head and prothorax ... ... Cacephatus. 



HH. Metasternum extremely short ... Xynotropis. 



EE. Eyes strongly emarginate ... ... Xenocerus. 



BB. The transverse carina of the pronotum coincides 

 with the base (at any rate in the middle). 

 C. Rostral scrobes strongly sulciform ; antennas 



notably shorter than head and prothorax ... Basitropis. 

 CC. Rostral scrobes and antennas not as in Basitropis. 

 D. Front coxas widely separated from one another. 

 E. Rostrum emarginate at apex and not forming 



an even surface with the head ... ... Phloeobius, 



EE. Rostrum truncate at apex and forming an 



even surface with the head ... ... Streneoderma. 



DD. Front coxas subcontiguous or very narrowly 

 separated. 

 E. Antennas not reaching the base of the pro- 

 thorax, and more or less stout. 

 F. Rostral scrobes visible from above . . . Ozotomerus. 



FF. Rostral scrobes not visible from above . . . Cratoparis. 

 EE. Antennas reaching much beyond base of 

 prothorax (at any rate in male) and ex- 

 tremely slender. 

 F. Joint 3 of antennas at least twice as long 

 as 1 and 2 together. 

 G. Basal joint of hind tarsi notably longer 



than 2 and 3 together ... ... Exillis. 



GG. Basal joint of hind tarsi about equal to 



2 and 3 together... ... ... Euciodes. 



FF. Joint 3 of antennas about equal to 1 and 



2 together ... ... ... ... Notascia. 



A A. Antennas inserted on the upper surface of the rostrum. 

 B. Eyes rounded or widely oval, somewhat finely 

 granulate. 

 C. Apex of front tibias with a strong spine perpendi- 

 cular to the axis of the tibia ... ... Arasocorynus. 



CC. Apex of front tibias normal. 



