\ 



1879.J OOO [Horn. 



Anterior tarsi not thickened, more slender at tip. 

 Disc of thorax trilobed. 



Clypeus carinate at middle ; tibiae slender at base saucius Lee. 



Clypeus not carinate, broader than the head ; middle and posterior 

 tibiae broad and flat ; middle coxae contiguous . . . Wheeleri Lee. 

 Disc of thorax simple, not trilobed. 



Hind angles of thorax rounded, the margin posteriorly acute ; tarsi 



very short and flat above leucostictus Burm. 



Hind angles of thorax more or less prominent. 



Legs and tarsi short, the former decidedly fossorial, the latter 

 much compressed. 

 Tarsi very short, less than half the tibiae, hind angles continu- 

 ous -with the disc '. Schaumii Lee. 



Tarsi longer than half the tibiae. 



Hind angles continuous with the disc Westwoodi Horn. 



Hind angles limited by an oblique groove angularis Lee. 



Legs ambulatorial, tarsi as long as the tibiae. 

 Hind angles continuous with the side margin. 



Front angles smooth, limited behind by a transverse impres- 

 sion pilosicollis Horn. 



Front angles continuous with the disc, punctured. 



Clypeus wider than the head crinitus Lee. 



Clypeus not expanded Knochii Lee. 



Hind angles strongly retracted. Surface shining . . .nitens Lee. 

 Mentum plate with a small acute incisure behind, 



Hind angles of thorax much retracted, anterior angles prominent and 



distinct from the disc variolosus Kby. 



Hind angles feebly retracted, anterior angles continuous with the disc. . 



squamulosus Lee. 

 Mentum plate with a deep emargination at the middle of the posterior 

 margin. 

 Disc of thorax coarsely and densely punctured. Surface opaque. 

 Anterior angles of thorax continuous with the disc. 



Hind angles feebly retracted, continuous at the outer margin with 



the disc canaliculars Kby. 



Hind angles strongly retracted, depressed below the surface of the 



thorax retractus Lee. 



Anterior angles separated from the disc by a transverse impression, 

 hind angles feebly retracted but depressed beneath the surface of 



the disc castaneee Kn. 



Disc of thorax sparsely and irregularly punctured. 



Anterior angles short, obtuse, hind angles moderately retracted and 



slightly depressed Harrisii Kby. 



In the above table Wheeleri is placed in the series with entire mentum, 

 although that organ is usually, but not always incised posteriorly. It 

 would be decidedly out of place anywhere else, when the aggregate of its 

 construction is taken into account. 



