30 PROCEEDINGS OF THE ACADEMY OP 



unequal sparingl}' and deeply- punctate; elj-tva coarsely and 

 rather sparingly punctate, each with an equally broad fulvous 

 vitta from the shoulder to the apex, where it recurves to meet the 

 suture. L. .21. Kansas (Leconte). 



CRYPTOCEPHALIDES. 



A. Antennae short, dentate received in grooves. Chlamydini. 



B. Antennae v.Mth joints 5-11 dentate. Chlnmyn. 



Bb. Antennae with joints 6-11 dentate. Exeraa. 



Ah. Antennae tolerably long, free. Cryptocephalini. 



B. Thorax not margined or impressed at base. 



C. Antennae thickened, prosternum broader than long. Monachui. 

 Cb. Antennae long, filiform, prosternum long. Cryptocephalus. 

 Bb. Thorax with an impressed margin along the base. 



C. Prosternum flat. Griburius. 



Cb. Prosternum grooved, pointed behind. PacTiybrachyi. 



Chlamys, Knoch. 



A. Legs black, above metallic. plicata. 



B. Legs red, above black. foveolata. 



I am unable to separate C. assimilis, Kl'ig? a"cl C- polycocco, 

 Lac, from G. x>licata. Of C. tuberculata, Klug, I have seen no 

 specimens. 



Exema, Lac. 



A. Metallic, subcupreous. gibber. 



B. Black or varied with fulvous. cojispersa. 



Mannerheim's connpersa is evidently identical with E. dispar., 

 Lac, which is a most variable little species. 



MoNACiius, Chev. 



A. Steel blue ; legs concolorous. i ^"P<''^"*^'>^ 



( seminulum. 

 Ab. Steel blue ; legs red. 



B. Thorax with a basal row of deep punctures. auritus. 



Bb. Thorax red with no basal punctures. , thoracica. 



I am unable to distinguish M. alei; ITald., and 3T. aenmmhim , 

 SufTr. T liave not seen; it is quite small (f lin.), clypeus, basal 

 joint of antennfc, and anterior tibiaj reddish ; the punctuation is 

 much as in sajmiw/m. Suff. Tiinn. Ent. xii. 344, 4. Georgia. 



M. affinis^ llald. is the 9 of M. auritus. 



