CERAMBYC1DAE. 303 



the species mentioned by him in Elaphidion, as the differences in 

 the sternum, upon which the genera were separated, seem to me 

 to be of purely specific importance. 



I have been disposed to retain Anoplium for the second species 

 of Haldeman, A. unicolor, which has been fully described by 

 Lacordaire ; the first species being placed in Stromatium, the 

 name is thus rendered disposable. But it seems to be so slightly 

 different from Elaphidion, that it is more prudent to suppress it. 



Aneflus contains E. protensum with the elytra bispinose, and 

 E. tenue, lineare, etc , with the spines much shorter, or wanting. 



Eustroma is founded upon Elaph. validum Lee, a large, stout 

 species from Texas and Lower California, with short and stout 

 antennae, the intermediate joints of which are concave beneath; 

 the antennal spines are short, and the femora and elytra are 

 unarmed ; the 4th joint of the antennae is conspicuously shorter 

 than the 3d or 5th ; the sides of the prothorax have a large oval 

 patch of dense yellowish pubescence in two specimens from 

 Texas, but in another specimen it is much less distinct, and in 

 one, from Lower California, it is not visible. 



Zamodes contains a black species from Pennsylvania, of the 

 same size and form as Tylonotus, but without callosities on the 

 prothorax; the antennae, legs, and general surface of the body 

 are clothed with long, erect, flying hairs. From its strong 

 resemblance in appearance to Zamiuni Pascoe, which is placed by 

 Lacordaire in his group Saphanides, I have derived the generic 

 name. 



Group III.— Ibidiones. 



The very elongate form, large and coarsely granulated eyes, and 

 clavate thighs will easily distinguish the members of this group 

 from all others in our fauna; in addition, it will be observed, that 

 the front coxae are small, rounded, and either inclosed, or a little 

 open behind, the middle coxae are not open externally and the 

 cavities not at all angulated; the hind tarsi are slender, the 1st 

 joint as long as the two following united. The front is small and 

 perpendicular, the mandibles short, acute, the palpi somewhat 

 unequal, short, dilated. 



The antennae are elongate, slender in the ?, thickened at the 

 base in % ; sparsely punctured, and pubescent, not sericeous. 

 The episterna of the metathorax are narrow, parallel, and have 



