342 SEREICOENIA. 



c. Elytra obsoletely emarginate or rounded at the apex* 

 c' . Antennae with joint 3 nearly twice as long as 2. 

 c". Hind angles of the prothorax carinate above. 

 a"'. Punctures of the prothorax unequal in size. 



of. Elytra rather coarsely punctate-striate Species 6. 



b\ Elytra finely punctate-striate Species 7-11. 



b'". Punctures of the prothorax equal in size Species 12. 



d". Hind angles of the prothorax not carinate above ; prothorax narrow 



and subcylindrical Species 13. 



d! . Antennae with joint 3 not or very little longer than 2. 



e n . Hind angles of the prothorax carinate above and with a sharp carina 



extending along the basal margin inwards Species 14-20. 



/". Hind angles of the prothorax not distinctly carinate along the basal 

 margin. 

 e'". Supra-lateral carina almost parallel with the margin. 

 c 4 . Punctures of the prothorax subequal in size. 



a". Punctures rather coarse Species 21. 



b°. Punctures very fine Species 22. 



d i . Punctures of the prothorax distinctly unequal in size .... Species 23. 

 d'" . Supra-lateral carina not parallel with the margin anteriorly. 

 e 4 . Punctures of the prothorax very fine and equal in size, or with 



slightly coarser ones intermixed Species 24-26. 



/ 4 . Punctures of the prothorax distinctly unequal in size .... Species 27. 

 B. Fourth tarsal joint with a long and very slender lamella beneath, the lamella 

 not visible from above ; antennae with joints 2 and 3 short, subequal ; size 

 small, 3-6 millim. 



d. The outer prosternal suture well defined. 



e'. Prothorax tuberculate in the middle before the base Species 28. 



f. Prothorax not tuberculate in the middle before the base Species 29. 



e. The outer prosternal suture indistinct. 



g'. Punctures of the prothorax unequal in size Species 30. 



h'. Punctures of the prothorax subequal in size ■ . . . . Species 31, 32. 



1. MonocrepidillS rodriguezi. (Tab. XV. figg. 6, <s ; 6 a, antenna.) 



Monocrepidius rodriguezi, Cand. Elat. Nouv. iii. p. 47 \ 



Hab. Mexico, Cordova, Tuxtla {Salle), Jalapa, Oaxaca (Hoge) ; Beitish Hondueas 

 (Blancaneaux) ; Guatemala 1 ; Nicaeagua, Chontales (Belt) ; Costa Rica ( Van Patten), 

 Volcan de Irazu (Rogers) ; Panama, Vol can de Chiriqui (Champion). 



Var. The elytra with a broad marginal stripe, interrupted beyond the middle, obscure testaceous. 

 Monocrepidius decimus, var., Cand. Monogr. Elat. ii. p. 206 2 . 



Hab. Mexico (Klingelhbffer 2 ), Playa Vicente, Tuxtla, Tepansacualco (Salle), Jalapa, 

 Cerro de Plumas, Tapachula (Edge); Beitish Hondueas, R. Hondo (Blancaneaux) ; 



