17 



20 (21) \>rtex of head dull, appearing very densely, minutely 



punctate or shagreened all over C. herbaruni. 



21 (20) \'ertex shining, almost smooth C. xestocephaius. 



22 ( I ) Pronotum in dorsal aspect not conspicuously divided 



into a transverse anterior and an elevated posterior 

 lobe, at most with a feeble or obsolete impressed line 

 dividing these ; in strict lateral view the dorsal outline 

 is at most only faintly indented at that point, or in 

 some species it even forms a regular curve throughout. 



23 (24) Posterior femora darkened at tips; 6 apical joints of 



antennae dark, black or blackish C. itiiicus. 



24 ( 2;^ ) Posterior femora not dark at tips ; antennae not color- 



ed as above. 

 23 (26) Antennae pale, joints 7 and 8 dark, the two apical ones 



clear yellowish-testaceous C. kocbelei. 



26 ('25) Antennae pale, but with the four apical joints black, 



or sufifused with black C. simulator. 



I. C/ialcogonatopiis Icpfias sp. nov. 



Black, the mandibles except the teeth, the face below the an- 

 tennae, a line along the inner orbits above these, and the scape 

 in front, yellow. The antennae, except the apical three joints 

 and sometimes more or less of the one preceding these, v/hich are 

 black, clear yellowish testaceous. Front legs with the apex of 

 the coxae, the trochanters, apex of femora, tibiae and tarsi yellow 

 or brownish yellow, some parts being darker than others, the 

 femora dark brown or piceous ; middle femora, tibiae and tarsi 

 yellow, or in parts light brownish yellow-, the incrassate part of 

 the femora dark, their extreme tips slightly darkened. 



Head strongly concave above, .'smoother and more shining in 

 front of the anterior ocellus, behind which it is quite dull, with 

 densely roughened surface. Antennae quite slender, the third 

 joint one and a half times the length of the fonrth, the latter nearly 

 six times as long as its width at apex. Pronotum with well 

 marked transverse furrow, the front division smooth and shining, 

 distinctly emarginate in the middle in front, the posterior division 

 very densely punctate ; mesonotal constriction narrow, longer than 

 wide, densely sculptured and with a tendency to a median carina- 

 tion ; propodeum distinctly pilose, narrow, elongate-ovate, smooth 

 and shining on the disc, finely transversely rugose posteriorly. 

 Front legs'verv slender and elongate, as compared with C. fre- 

 quens and others, the femora being relatively much less strongly 



