196 GEORGE H. HORN, M. D. 



various parts, the work of Chapuis in the " Genera des Coleopteres" 

 is recommended. The genera known to me will be found in the 

 annexed table, together with the group to which they should be 

 referred in the works of Chapuis and Lefevre. 



Anterior margiu of prothorax beneath arcuate, forming post-ocular lobes 2- 



Anterior margin of prothorax beneath straight .* 8. 



2. — Body above pubescent or scaly 3. 



Body above glabrous 5. 



3. — Thorax without distinct lateral margin (Adoxites) Adoxus. 



Thorax with distinct lateral margin (Myochroites) 4. 



4. — Presternum much longer than wide, narrowed between the coxse. 



Front tibiae toothed on inner side near the apex ; margin of thorax usually 



dentate ...Iflyocliroiis. 



Front tibiae simple; thorax entire Glyptoseeliiii. 



Prosternum broad, flat, subquadrate ; claws very distinctly bifid. 



Colaspidea. 

 5. — Middle and posterior tibiae emarginate on outer edge near the apex (Typo- 



phorites) Typophorus. 



Tibiae all entire 6. 



6.— Claws simply divergent (Corynodites) Clirysochus. 



Claws divaricate 7. 



7. — Prosternum narrowed between the coxae and convex from apex to base 



(Edusites) Tymiies. 



Prosternum broad, flat, subquadrate (Endocephalites) Colaspoides. 



8. — Thorax without distinct lateral margin 9. 



Thorax margined 10. 



9. — Head without supra-orbital groove ; body above without metallic colors 

 (Leprotites). 

 Thorax transverse; front thighs with a small tooth; third joint of an- 

 tennae not longer than the second Xautliouia. 



Thorax cylindrical; thighs mutic; third joint of antennae longer than 



second Fidia. 



Head with supra-orbital groove (Scelodontites). 



Body above with metallic colors Grapliops. 



10. — Head with distinct supra-orbital groove {Metachromites). 



Middle and posterior tibiae emarginate near the apex...l?Ietacltroiiia. 



Head without supra-orbital grooves 11. 



11. — Claws distinctly bitid { Enmolpites) Eulliolpus. 



Claws append iculate, usually broadly so 12. 



12. — Lateral margin of thorax irregular or undulating (Colaspites). 

 All the tibiae entire. 



Prosternum narrow and contracted between the coxae Colaspis. 



Prosternum wide and nearly parallel-sided Kliabdopterus. 



Middle tibite emarginate near the apex Metaxyouyclia. 



Lateral margin of thorax regular and entire (Jphimeites). 



Third joint of antennae distinctly longer than the third, the outer five 



joints not abruptly wider Nodonota. 



Joints 2 — 5 of antennae very nearly equal in length, the outer five joints 

 rather abruptly wider. 



Form oblong, thorax with basal marginal line 9IetaparJa. 



Form semi-globose, thorax without basal marginal lincClirysodiiia. 



