190 CERAMBYCIDJE. 



a'. Antennae very long in tf , tapering to- 

 wards end; hind femora extended con- [p. 198. 



siderably past apex of elytra CHLORIDOLUM, 



V. Antennae never much longer than body 

 in c? ; hind femora rarely, and then 

 only slightly, extended so as to pass 

 apex of elytra in <$ . 



a~. Elytra dehiscent, either very short 

 or else considerably narrowed pos- 

 teriorly NOTHOPEUS, p. 202. 



b 2 . Elytra normal, long. 



a j . Prothorax tuberculate at the sides. 

 a 1 . Antennal joints from 5th or 6th 

 to 10th dentate or spinose at 

 apex. 

 a s . Hind femora not reaching to [p. 205. 



apex of elytra in <5 APHRODISIUM, 



4*. Plind femora reaching to apex 



of elytra or slightly beyond [p. 210. 



it in c? CHELIDONIUM, 



b*. Antennal joints not dentate at 

 apex ; hind femora not reach- 

 ing to apex of elytra in cf POLYZONUS, p. 213. 



b 3 . Prothorax unarmed at sides ANTJBIS, P- 220. 



B. Last four or five joints of antennae strongly 



dilated j hind femora subclavate IPOTHALIA, p. 222. 



Genus ZONOPTERUS. 



Zonopterus, Hope, Trans. Linn. Soc. six, p. 110 (1843) ; Lacord. 

 Gen. CoUopt. ix, p. 9 (1869). 



Type, Z. Jlavitarsis, Hope. 



Range. Indo-Malayan Kegion. 



Head with the front and cheeks rather short, the clypeus large, 

 prolonged below the base of the mandibles and membranous 

 towards the end, the inter-antennal ridge slightly concave from 

 side to side. Antennae thick, shorter than the body in both 

 sexes ; joints first and third slightly augulate at the apex in front, 

 fourth to tenth more distinctly angulate or sub-dentate, third 

 nearly twice as long as the fourth, fifth to tenth very slightly 

 diminishing in length, eleventh but slightly longer than the tenth 

 and obtuse at the apex. Prothorax transverse, rounded or 

 slightly protuberant at the middle of each side, constricted at the 

 base. Elytra long, parallel-sided or nearly so, conjointly rounded 

 at the apex. Femora rather stout, gradually thickened from 

 before the middle to within a short distance of the apex, the 

 hind pair not reaching to the apex of the elytra. First joint of 

 the hind tarsus little or not longer than the next two joints 

 united. Prosternuui more or less strongly arched between the 

 coxae, gradually expanded posteriorly and somewhat emarginate 

 at the end, where it reaches almost to the spine. 



