36 PROCEEDINGS OF THE ACADEMY OP 



pubescent, but the elytra with the base, margin, suture, and a 

 discal spot clothed with long white hairs; less closely punctate 

 than G. hirtus, and the sides of the tliorax gradually narrowed 

 to the base, L. .40-.41. California (Horn), Oregon (Walsinghara). 



Very distinct by the irregular pubescence. 



J* Last ventral segment with a deep smooth fovea. 



3. G. albidus, Lee, Proc. Acad. 1859, 81. 



Cylindrical, allied to G. hirhis, but rather densely clothed with 

 squamiform, pale hairs ; thOrax and elytra less closely punctate. 

 L. .30-.32. California. 



4. G. barbatus (Say), J. Acad., v. 296. 



Shorter and stouter than the other species ; thorax distinctly 

 narrower tlian the elytra, strongly and closelv })nnctate, as in G. 

 hhius ; surface densely clothed vvith uniform brown hairs. L. ..30. 

 Pennsylvania. 



5. G. squamulatus, sp. n. 



Cylindric; thorax subelongate, sides straiglit; punctuation 

 rather open ; surface densely clothed above and below with whitish 

 elongate scales. L. .30. California (Leconte) ; Oregon (Walsing- 

 ham). 



6. G. crypticus, Say, J. Acad., iii. 449. . 



Form and size of G. hirtiis, more sparinglj'- punctate ; clothed 

 throughout with a whitish subsquamiforra pubescence ; claws much 

 less strongly bifid. L. .30. Atlantic region. 



(^ Elytra mucronate at the apex; last ventral segment with a 

 smooth fovea. 



7. G. alternatus, sp. n. 



Very similar to G. crypticus^ l)ut with the pubescence on the 

 elytra denser on the alternate interstices, so as to give a faint 

 striped appearance. Tliorax with the sides rounded. L. .37. 

 California (Ilorji). 



J* Elytra not mucronate; last ventral segment with a smooth 

 fovea. 



8. G. cuprascens (Lee), Pr. Acad. 1858, 85. 



Sul)quadrate, shining, cupreous, rather sparingU' clothed with 

 short erect hairs; upper surface evidently and not closelj'^ punc- 

 tate, interstices of the punctures shining; thorax subtransverse, 



