36 JOHN HAMILTON, M. D, 



570. Hylastes nigrinus ISIanu., C 143, — Sitkha, Washington, Oregon, California. 



571. H. cavernosas Ziiiim. — Loring (Alaska), Michigan, Canada. "The At- 



lantic States" (Zimniermann). 



572. Hylurgops (Hylastes) rugipennis Mann., A 258, D 218, two varieties. — 



Kadjak, Sitkha, Loring, Washington to southern California, Colorado, 

 Wisconsin, Michigan. 



573. H. subcostulatus Mann., D 219. — Kenai, Oregon. Sierra Nevada Moun- 



tains, California through the coast range. New Mexico. 



574. Hylastes cristatus Mann., D 220. — Interior of Kenai. Eeferred doubt- 



fully to Hylurgops by Dr. LeConte. 



su]V[m:a.ry. 



Number of families, 47; genera, 256; species, 574. 



Number of species common to both hemispheres, 138. 



Number of species occurring in Alaska and other parts of North America, but 

 not recorded from the eastern hemisphere, 241. 



Number of species occurring in Alaska and not recorded from elsewhere, except 

 some from Queen Charlotte Island, 175. 



Number of species imported through commerce, 17. 



Doubtfully Alaskan, 3. 



Species common to northern Asia and Alaska not recorded from other parts of 

 North America, 33. 



Species found in continental Alaska, 61. 



Some of. these likewise occur on the Alaskan islands and peninsulas; also else- 

 where in northern America and Asia. 



Number of species taken on the coast of Behring Strait and along the Yukon, 28. 



The valley of the Yukon is probably rich in Coleoptera. Mr. Wm. H. Dall, 

 in his "Alaska and its Eesources" mentions (p. 67) having taken at Nulato, on 

 April 10th, a large number of a small musk-beetle of a steel-greeu color and 

 strong odor [probably an Acmxops] ; and several other species were obtained 

 from stumps and mossy hillocks which projected above the level of the melting 

 snow. These seem to have been lost to science as well as those said to have been 

 taken at Point Barrow during the cruise of the "Corwin." This is to be re- 

 gretted, as there is no record of any named species of Coleoptera having been 

 taken in North America within the Arctic Circle, except Quedius fulgidus at 

 Discovery Bay, beyond the 82° of latitude. 



