June, 1920.] ChAMBERLIX : WoOD-BoRING BEETLES. 151 



NOTES ON TWO LITTLE-KNOWN WOOD-BORING 



BEETLES. CHRYSOBOTHRIS SYLVANIA FALL 



AND MELASIS RUFIPENNIS HORN. 



(BUPRESTIDiE, ELATERID^.) 



By W. J. Chamberlin, 

 Forest Entomologist? Oregon Agricultural College. 



Chrysobothris sylvania Fall. 



This buprestid was described by Prof. H. C. Fall (1)1 as follows: Original 

 Description : 



" C. sylvania new species. Closely allied to trinervia, but rather broader 

 and heavier, the color beneath bright green in the male, dark green with 

 cupreous reflections in the female; prothorax as abruptly or even -more ab- 

 ruptly narrowed behind than in front ; elytral costs not as distinctly elevated 

 as in typical trinervia, the smooth spaces sharply defined, the punctured areas 

 more densely punctate than in trinerz-ia; sexual characters as in trinervia. 

 Length 11. 5-1 1.8 mm.; width 5-5.1 mm." 



The type material consisted of four specimens, two of each sex, 

 taken by Mr. Ricksecker at Sylvania, Calif. 



The next reference to this species is in Dr. Woodworth's '' Guide 

 to California Insects" (2) where he merely lists C. sylvania as oc- 

 curring- in California. 



In 1916 Dr. E. C. Van Dyke (3) mentions that the type material 

 was taken in Sonoma Co., and that ]\Ir. Nunenmacher had taken a 

 specimen in Del Norte Co., also that specimens had been taken in 

 Oregon by Mr. J. C. Bridwell and myself. In 191 7 (4) I summarized 

 the foregoing information and added some Oregon localities to the 

 distribution and gave Douglas fir as a host tree. 



Aside from the brief notes mentioned there has been nothing con- 

 cerning this species published. 



Adult. Length 12 mm.; width 5 mm. 



Antennae green, lobes of joints 4 to 1 1 purplish, joints i to 3 more slender 

 than 4, joints 4 to 1 1 gradually narrowing, third joint as long as the next two. 

 L'pper front brassy green, lower portion brilliant green, densely, coarsely 

 punctate with two smooth callosities. Clypeus broadly emarginate. acute at 



1 Numbers refer to the bibliography. 



