CERAMBYCIDAE. 281 



Protliorax even (palpi equal). Stromatium. 



Frontal suture faint, acent pores distinct ; 

 Elongate, protliorax even, antennae very long. Osmidus. 



B. Front coxal cavities rounded, or feebly angulated ; 



a. Scutelluni acute, ti'iangular, frontal suture very deep ; autenn;e 



very long, sulcate ; 



Protliorax with lateral spine, but no dorsal callosities, elytra and thighs 



spinose at tip ; episterna of nietathoi'ax wider in front, scent 



pores distinct. Chion. 



6. Scutelluni rounded behind ; 



* Femora not strongly clubbed ; antennae not carinated ; 

 Elytra with ivory spots, protliorax with dorsal callosities, and usually 

 with lateral spines ; elytra and thighs eitlier spinose or unarmed ; scent 

 pores distinct ; antennae unarmed. Eburia. 



Elytra without ivory spots, antennae usually spinose; 



Episterna of metathorax narrower behind, antennae with sensitive 

 spaces. Romaleum. 



Episterna of metathorax parallel ; antennae witliout sensitive spaci's. 



Elaphidion. 

 ** Antennae carinated, femora not strongly clubbed ; 

 Antennae slender. Anefliis. 



Antennae stout, joints excavated beneath. Eustronia. 



*** Femora strongly clubbed. 

 Antennae bisulcate. Tylonotus. 



Antennae not sulcate. Zaniodes. 



Hammaticlicrus is reprosented by H. mexicanus Tliomsoii, 

 which occurs in Lower California. 



Axestiuus is allied to Xcstia, but is clothed with fine gvny 

 pubescence; the species A. obscui-us is of large size (30 mm.), 

 and occurs in New Mexico. . 



To Stromatium may be referred Anoplium puheHcens Hald. ; 

 it belongs to the division of the genus without pubescent spaces 

 on the prothorax of tiie %\ the disk is, however, more finel}^ 

 punctured in that sex than in the 9, just as in Romaleum. 



Osmidus contains an elongate species from Lower California, 

 resembling in appearance IIesperoi)hanes, ami like many of tlie 

 species of that genus, finely and densely pubescent, with rountl 

 denuded slightly elevated spots on the elytra; the al)sence of the 

 deep frontal suture seen in the neighboring genera is a rennirk- 

 able character. 



Komaleum White has distinct sensitive spaces on the anCcnme, 

 especially well marked in the 9, commencing in a small depres- 

 sion on the outer face of the 4th joint. It contains all of our large 



