290 MEMOIRS ON THE COLEOPTERA 



eyes as in Stenolophus and the antennae are shorter and thicker, 

 but otherwise as in that genus. The emargination of the mentum 

 is deep, much more broadly parabolic than in the preceding genus 

 and the bottom of the notch is sometimes subprominently arcuate 

 at its middle, suggesting a rudimentary tooth. The mentum bears 

 two long discal setse near the notch. The ligula is long, distinctly 

 dilated at apex, the paraglossae diverging, rather slender, concave 

 and narrowly rounded or subacute at their apices. The labial 

 palpi are only moderate in length, the second joint with two long 

 anterior and single postero-apical setae, exactly as in Stenolophus, 

 but here the third joint is slender, very gradually and more obtusely 

 pointed and is apparently not quite as long as the second joint. 

 The inner lobe of the maxilla is strongly falciform, the inner fringe 

 long and coarse, the last joint of the outer lobe rather long, very 

 slender and gradually pointed distally and slightly arcuate. Sexual 

 differences are more feebly developed than in any other genus of 

 the tr be, excepting the preceding. The anterior tarsi of the male 

 are barely visibly more swollen than in the female, though usually 

 a little shorter, and they bear beneath two series of long, slender, 

 internally crenate and hyaline squamae, often difficult to observe; 

 the middle tarsi are unmodified. The abdomen bears some sparse 

 pubiferous punctures, analogous to the accessory setae of nearly 

 all the Daptids and some Harpalids a character recurring fre- 

 quently in the subfamily and present also in Stenolophus; the 

 last segment bears four apical setae in both sexes, the apex being 

 slightly more lobiform medially in the male than in the female. 



The components of the genus are numerous but have been scarcely 

 at all studied thus far, except in a rather superficial way by Le- 

 Conte. The species may be arranged as follows: 



Body very stout in form, the pronotum pale but with two central black 

 spots 2 



Body more slender, the pronotum variously colored but never with two 

 black spots 3 



2 Form very stout and convex, oblong-oval, moderately shining, pale 

 flavo-testaceous in color, the vertex with a transverse black chevron, 

 the pronotum with two rounded central spots arranged transversely, 

 the elytra each with a deep black vitta on intervals 2-4 from near 

 the apex to basal third or fourth, bifid anteriorly; under surface and 

 legs pale throughout; head two-thirds as wide as the prothorax; 

 antennae thick, not attaining the thoracic base, testaceous, densely 



