130 CUECDLIOKID.i:. 



to split i;p the genus Astycns ; for the latter has recognised as 

 valid genera every one ot" the names which are here treated as 

 synonvms. The examination of a considerable amount of addi- 

 tional material (for there are here enumerated 16 species which 

 were unknown to Faust) shows that the characters upon which he 

 relied for liis genera are all liable to such serious exceptions that 

 they must be treated merely as specific, and not generic distinc- 

 tions. The principal characters that lie utilised were the curvature 

 of the scrobe, the tibial furrows, the relative length of the mela- 

 sternum., tlie proportions of the two basal joints of the fuuicle, 

 and the sliape of the elytra. 



Schouherr actually cited as the ty]ie of Astijcns, Curculio adultns, 

 Oliv., a species which he had only doubtfully identified ; but the 

 insect he had before him is imquestionably conspecific with 

 A. chri/sochlorus, Wied. 



Ke)/ to the Species. 



1 (18) Tibiae with a longitudinal furrow 



on the upper surface, especially 

 in tiie anterior pairs. 



2 (17) Front coxte contiouoiis or siibeon- 



tiguous ; metasternum and ab- 

 domen finely granulate. 



3 (8) Intervals on elytra smooth and 



without conspicuous granules on 

 the disk. 

 1 (7) Basal margin of elytra deeply and 



continuously sinuate ; posterior , 



angles of prothorax only slightly 



prominent. 



5 (6) Elytra with uniform pale metallic 



green, blue-green or grey scaling; 

 joint 2 of funicle not, or very 

 slightly, longer than 1 chri/socJiloms, Wied., p. 133. 



6 (5) Elytra with metallic green scaling 



and each with a broad discal and 

 lateral yellow stripe, the stripes 

 uniting at the base and apex; 

 joint 2 of funicle evidently longer 

 than 1 Jiavovittatus, Pasc, p. 134. 



7 (4) Basal margin of elytra shallowly 



sinuate in the middle only, sub- 

 truncate laterally ; posterior 

 angles of prothorax very promi- 

 nent ; colour uniform metallic 

 oTeen adamsoni, sp. n., p. 135. 



8 (3) Intervals on elytra rugose or 



granulate. 



9 (16) Striffi on the elytra not punctate, 



but with rows of granules ; the 

 two basal joints of the funicle 

 equal. 

 10 (11) Forehead aud base of rostrum 



