CONOTRACHELUS., 341 
ad”. Prosternum not tuberculate behind the anterior coxe. 
’, Tarsal claws with a longer or shorter pointed tooth, the two 
teeth divergent at the tip. 
a‘. Elytra with the alternate interstices costate, the two inner 
coste * twice or thrice (rarely once), and often the third 
also more or less, interrupted. 
a’, Prothorax (except in C. impressicollis and C. foveicol.is) 
without conspicuous tubercles or prominences on the disc. 
a°, Anterior femora with a long, inwardly curved tooth . Species 32. 
6°, Anterior femora with a shorter, straight tooth, and 
sometimes a second smaller tooth or prominence 
exterior toit. . . . . . . . . . . . « « Species 33-71. 
6°. Prothorax with two or more tubercles or prominences on 
the disc +, the anterior ones sometimes cariniform and 
separated by a shallow longitudinal groove. . . . . Species 72-98. 
c’. Prothorax gibbous and carinate at the middle of the disc; 
2nd joint of funiculus elongate. . . . . . . . . Species 99. 
ad’. Prothorax with a Y-shaped elevation on the disc, some- 
times divided in the middle, and a depression behind it. Species 100-104. 
b‘. Elytra with the alternate interstices costate, the first costa 
interrupted before the middle. . . . . . . Species 105-108. 
‘, Elytra with the alternate interstices costate, the first costa 
interrupted beyond the middle . . . . . . . . ~ Species 109, 110. 
d‘, Elytra with the alternate interstices uninterruptedly costate. 
e’. Pygidium exposedinthe S$ . . . ... . . . « Species 111, 112. 
f’. Pygidium not visibleinthe ¢ . . . . . . . . « Species 113-121. 
e'. Elytra with the alternate interstices more feebly costate, 
the inner costz sometimes becoming evanescent towards 
the base . . . . ee ee ee ee ee ee) «Species 122, 128. 
f'. Elytra with all the interstices more or less convex . . . Species 124, 125. 
f’. Tarsal claws with a very long curved tooth arising from near 
the base, the two teeth almost meeting at the tip; elytra 
with the alternate interstices costate, the costz interrupted 
orentire. . . - woe ee . . « Species 126-130. 
. Tarsal claws with a long, broad, obliquely truncated tooth, 
the two teeth nearly meeting at the apex; elytra with the 
alternate interstices costate . . . woe . . . Species 181. 
hn’, Tarsal claws rectangularly dilated in their basal half: elytra 
with the alternate interstices feebly costate . . . . . . Species 182. 
d’, Rostrum widening towards the middle, short and stout, the 
antennee inserted towards the apex in both sexes. 
e’’, Elytra with the two inner cost abruptly twice interrupted . . Species 133, 134. 
f’’. Hytra with the first costa once interrupted . . . . . . . Species 135, 136. 
* Uninterrupted in C. continuus. 7 Inconspicuous in C. opacus. 
