ECOLOGY OF ISLE ROYALE, 199 



Lainpyridac. 



54. Podahrius diadcmu Fab. A. Found about the camp at the Light- 

 house (I, 7) on July 23 (G. 133), and among beach drift at the head of 

 Tonkin Bay (I, 1) on JuIy 7 (A. 7). Two specimens. 



(jeographic Range. Ottawa, CJanada; Mt. Washington, >v'. .H; Ver- 

 mont; New York; New Jersey; W. Penna.; Mich.; Wisconsin; Iowa. 



.55. Podahnit^ tomcntoms Sar. A. Taken at the camp on Siskowit 

 Bay (V, 3) on August 4 (G. 20i). 



Geographic Range. W. Penna.; Mich.; Illinois (Wolcott) ; ('olorado. 



56. Malthodes nlger T^ec. Found in a small rock pool on the Lake 

 shore (I, 1) on July 12 (G. 75). 



Geographic Range. Isle Eoyale, Jfarquette, Mich.; Lake Superior 

 region; Mt. Washington, N. H. 



Scaraljaeidae. 



57. Geotrupcs Uaclcbitrtiii Fab. A. Two of these beetles were taken 

 about horse dung on the Desor trail (III, '04) on August 21 (A. 143). 



Geographic Range. Ottawa, Canada; New York; New Jersey; Dist. 

 Columbia; Ohio; Mich.; Wis. 



58. Serica vespertina Gyll. A. One specimen found on the gravelly 

 beach near the Lighthouse (I, 1) on July 10 (G. 43). 



Geographic Range. Ottawa, Canada; Nova Scotia; Saskatchewan 

 basin; Vermont; New York; N. J.; Dist. Columbia; Fla. ; W. Penna.; 

 Ohio; Mich.; No. Illinois and Indiana (Wolcott); Wisconsin; Iowa; 

 Nebraska ; Kansas ; Colorado ; New Mexico. 



59. Diplotaceis liberta Germ. A. A single dead specimen (G. 102) was 

 found under a flat rock on a jack pine ridge (I, 5). 



Geographic Range. Isle Royale, Mich ; W. Penna. ; New Jersey ; Dist. 

 of Col. 



60. Lachnosterna arcuata Smith. A. Taken at the Light-house camp 

 (I, 7), on July 26 (G. 166). 



Geographic Range. W. Penna.; Dist. Columbia; Michigan; Elliot arid 

 Carbondale, 111. (Wolcott). 



61. Trichius affinis Gory. Very abundant in the flowers of the Cow 

 Parsnip (Heracleum lanatum) in the clearing at the Light-house (I, 7) 

 during July (G. 26, 45, 49, 105, 133, 136, 137). 



Geographic Range. Saskatchewan basin; Ottawa, Canada; Nova 

 Scotia ; N. H. ; New I'^ork ; New Jersey ; Virginia ; W. Penna. : Ohio. 

 Mich.; No. Illinois (Wolcott); Wisconsin; Iowa; Colorado; New 

 Mexico. 



Ceramhycidae. 



62. Phymatodes variaMlis Fab. A. Two specimens were taken on Sis- 

 kowit Bay (V, 3) on August 15 (G. 239) and August 16 (A. 152). 



Food plants. Larva feeds on the inner bark of dead and dying oaks 

 and hickory. Probably has other food plant as hickory was not found 

 on the island and oak is of very rare occm'rence. (Felt, '06, p. 433.) 



Geographic Range. Mass. to Alabama; W. Penna.; Ohio (Dury) ; New 

 York; Mich.; Wisconsin; Kansas; Colorado; Arizona. Hamilton, '97a, 

 p. 395. Probably introduced. 



63. Xylotrechus undulatus Say. This active beetle was exceedingly 



