256 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



43. Abdomen and metasternum finely, sparsely punctate 44 



Abdomen and metasternum coarsely, closely, deeply punctate 45 



44. In dorsal view beak not expanded over antenna! insertion; beak distinctly 



shorter than head and prothorax combined (New England-Florida-Texas- 

 Wisconsin) patruele Smith (p. 341) 



In dorsal view beak distinctly expanded over antenna! insertion; beak about 

 as long as head and prothorax combined (Peru; Amazonas). 



nitidum Kirsch (p. 341) 



45. Mucrones moderately long, slender; elytral intervals not much wider than 



striae (California, Arizona) abdominale Smith (p. 333) 



Mucrones short, blunt; elj'tral intervals nearly twice as wide as striae (Colo- 

 rado, Idaho, Montana; British Columbia, Alberta, Hudson Bay Territory). 



centrale Fall (p. 335) 



46. Beak about as long as prothorax (Illinois, Nebraska, Colorado, Arizona). 



modestum Smith (p. 276) 

 Beak distinctly longer than prothorax 47 



47. Prothorax slightly wider at middle than base; elytral intervals strongly convex, 



slightly wider than striae (Massachusetts-Tennessee-Texas-Iowa). 



porcatum Boheman (p. 344) 



Prothorax at middle not wider than base; elytra! intervals at most slightly 



convex, at least one-half wider than striae 48 



48. Elytra at humeri at least two-lifths wider than prothorax at base; elytra 



more than two and three-fourths times as long as prothorax .... 49 



Elytra at humeri one-third wider than prothorax at base; elytra less than two 



and three-fourths times as long as prothorax 55 



49. In lateral view dorsal surface of head above eyes distinctly declivitous 



(Tamaulipas) nanulum, new species (p. 357) 



In lateral view dorsal surface of head is flat from eyes to base 50 



50. Elytral intervals convex (Tabasco; British Honduras; Guatemala). 



oscillator Sharp (p. 359) 

 Elytral intervals flat 51 



51. Pubescence on side of prothorax about as coarse as that on dorsal surface or 



midline 52 



Pubescence on side of prothorax about twice as coarse as that on dorsal sur- 

 face; in dorsal view beak strongly expanded over antenna! insertion (Ta- 

 basco; Guatemala; Nicaragua) managuense Wagner (p. 354) 



52. Prothorax with uniform, sparse pubescence on dorsal surface 53 



Prothorax with scales along median line coarser than those on lateral portion 



of dorsal surface 54 



53. Prothorax sparsely, finely, shallowly punctured dorsally and laterally; eyes 



acutely prominent; scales in elytral striae minute, not larger than those 



on intervals (Tamaulipas) subsequens, new species (p. 364) 



Prothorax moderately densely, finely, deeply punctured; eyes more rounded; 

 scales in elytral striae distinctly larger than those on intervals (Ontario; 

 New York, Virginia, Tennessee, Texas, Kansas, Iowa, Michigan). 



reconditum Gyllenhal (p. 361) 



54. Beak slightly shorter than head and prothorax combined; prothorax more 



deeply, uniformly punctured (Texas, Tamaulipas). 



sublinctum Fall (p. 365) 



Beak slightly longer than head and prothorax combined; prothorax more 



shallowly, irregularly punctured (Guatemala), subrufimi Sharp (p. 363) 



