288 



B. Clypeus of both sexes conspicuously 

 reflexed in front. 

 C. Clypeus of male truncate in front. 



Elj'tra unicolorous ... ... ... OUiffi, Blackh. 



CC. Clypeus of male distinctly and 

 widely emarginat« in front. 

 Elytra red towards apex ... ... grisea, Burm. 



BB. Clypeus in both sexes not reflect- 

 ed, only narrowly margined ... debilis, Blackh. 



CAUJ.OBIUS. 



I have already discussed the genus (vide Automolus, 

 supra), and will here merely repeat that I cannot see my way 

 to a better treatment of the species than I attribute to it. I 

 am afraid the genus as here regarded is little better than a 

 receptacle for somewhat diverse species associated on the 

 ground of their belonging to the Liyaretrus group without 

 bein^ attributable to any other of its genera than this one. 

 The first four species (in the following tabulation) are really 

 very close to Automolus, but have their propygidium quite (or 

 largely) covered by the elytra ; the remaining four species (in 

 the tabulation) differ much in fades from the first four, but 

 I cannot find satisfactory structural differences for the crea- 

 tion of a new genus. As in Liyaretrus and Automolus, the 

 number of antennal joints varies in Caulohius. The first four 

 species and the last in the tabulation (which follows and shows 

 characters differentiating the species that I place in Caulo- 

 hius) have 9-jointed antennae, while there are only 8 joints 

 in the antennae of the other three species. 



A. Less elongate species. Length of 

 elytra exceeding width by about ^ (or 

 le.ss) of the width. 

 B. The lateral margins of the clypeus 

 strongly sinuate-emarginate. 

 C. The pronotum Avith very coarse 

 sparse sculpture. 

 D. Elytra very coarsely sculptured. 



Tarsi robust ... ... ... discedens, Blackh. 



DD. Elytra much less coarsely 



sculptured. Tarsi slender ... immitis, Blackh. 

 CC. Pronotum much more closely and 



less coarsely sculptured ... ... rotundus, Blackh. 



BB. Lateral margins of clypeus not 



emarginate ... maechidioides, Mad. 



AA. More elongate species. Length of 

 elytra exceeding width by about I 

 of the width. 

 B. Pronotum densely clothed with long, 



erect pilosity ... ... ... ... villiger, Homhr. and 



BB. Pronotum not as B. J acq. 



C. Club of antennae dark. 



D. Elytra opaque ... ... ... rufesoens. Blanch. (?J 



DD. Elytra subnitid ... ... advena, Blackh. 



CC. Antennae entirely pale testaceous punctulatus, Blackh. 



