60 JOHN L. LF, (^ONTE, M. D. 



tera, most, of which have been already described: of these 14 are re- 

 cognised by me as belonging to Alaska, and 54 to California. 



CYCHETJS Fabr. 

 Specimens of C. crisiatus are contained in the collection, and give 

 me the opportunity of adding to the present communication some notes 

 on the species of this genus which have been found in our Pacific pos- 

 sessions. It happens by a fortunate coincidence that I have received 

 from Dr. Horn about the same time, specimens of G. velutinus Men. 

 1 have also seen in the collection of Mr. Ulke a specimen of CJ. ungu- 

 latus Harris ; of the described species, therefore, only C. dissofutiis 

 Schaum and G. subtilis Schaum, remain unknown to me. 



A. Lega and antennae very long and slender; the latter three-fourths the 



length of the body, with the fourth joint but little shorter than 

 the fifth ; color above dull, without lustre ; striae of elytra very 

 fine, punctured ; '^ with joints 1 — 3 of the front tarsi spongy 

 beneath, the 4th with two small tufts of yellow hairs : 



Thorax more strongly narrowed behind, and more strongly margined, in- 

 tervals of elytra equal, margin metallic-green. Ah\ska to Cali- 

 fornia 1. angusticollis Fisclier. 



Jjarger; thorax less narrowed behind, and very narrowly margined ; color 

 dull purplish-black; elytra margined with dark blue, three 

 of the intervals more distinct. Southern Oregon. 2. velutinus Men. 



B. Legs .stouter; antennae not more than two-thirds the length of the body, 



with the second joint about one-half as long as the third ; color 

 above not altogother dull; elytra strongly, or at least, distinct- 

 ly punctate-striate : 

 a. ^ with joints 1 — 3 of the anterior tarsi spongy beneath, the 4th with 

 tufts of hairs and a few papillae; elytra at the sides and apex 

 deeply striate, intervals convex, interrupted, especially at 

 the sides and tip : 

 Tliorax strongly narrowed, but not constricted behind; elytra ajncou.s, 

 with bright metallic margin. Oregon and Alaska. 



3. marginatus Dej. 

 (15 mm. Black, thorax strongly constricted behind. ..4. dissolutus Schaum. 

 h. 'J, with the joints 1—3 of the anterior tarsi spongy beneath : 



Head strongly tricarinate, middle carina high, irregular. California. 



5. cristatus Harris. 

 Head with a moderately elevated medial carina. Vancouver. 



6. angulatas Harris. 

 Head not carinate : 

 Thorax broad, gradually strongly narrowed behind, intervals of ely- 



tral striae somewhat interrupted. California 7. obliquus Lee. 



Thorax narrow, moderately con.stricted behind. Calif.. ..8. striatttS Lee. 

 Thorax broad, suddenly and strongly constricted behind: 



Elytra less convex, strongly margined. California. ..9. cordatus Lee. 

 Pilytra ventricose, narrowly margined : 



Smaller and broader. California 10. interruptus Men. 



Larger, less broad. California 11. ventricosus Dej. 



