OF WASHINGTON, VOLUME XIV, 1912. 35 



near apex, where it is rather abruptly flattened, strial punc- 

 tures small, elongate, the striae appearing as feebly though 



distinctly impressed lines concavus Casey 



New Mexico (Las Vegas). 



Lasconotus mexicanus, new species. 



Type: No. 14185 U. S. N. M. One specimen from the 

 late Dr. E. Uuges, Guanajuato, Mexico. 



This species resembles L. complex Lee. in many respects, 

 but is readily distinguished by the characters given above. 

 It differs from the other species in the group in having the 

 third interspace not more elevated at the apex than the fifth 

 and by its much smaller size. 



L. flexuosus, new species. 



Type: No. 14186 U. S. N. M. Hopk.; U. S. No. 2289dl. 



A single specimen collected by H. E. Burke, at Hoquiam, 

 Washington. A remarkably distinct species somewhat allied 

 to complex, but very different in prothoracic structure. 



Lasconotus complex Lee. 1859, p. 282. 



One of the larger species and the first representative of the 

 genus to be described. Associated with various scolytids in 

 galleries and beneath bark of Monterey and lodgepole pine and 

 Sitka spruce. Represented by some fifty specimens. 



Hopk. U.S. California: Monterey. Utah: Kamas. Wash- 

 ington: Hoquiam, Satsop. 



U. S. N. M. California: Placer County (Hubbard & 

 Schwarz, Koebele). Oregon: Clatsop. Washington: Spo- 

 kane Falls. Vancouver, British Columbia. Dr. Horn also 

 records Nevada. 



Lasconotus tuberculatus, new species. 



Type: No. 14187 U. S. N. M., Hopk. U. S. No. 989ad, 

 one of the five collected by J. L- Webb, at Elmore, South 

 Dakota. 



Closely allied to complex Lee., but easily distinguished by 

 the fact that the inner pair of costae are interrupted for long 

 distances by flattened areas bearing rather sharp elevations, 

 whereas in the former they are continuous throughout. There 

 is very little variation, except slightly in size. Associated 

 with various scolytids in galleries and beneath bark of Pinus 

 ponderosa, strobiformis, Picea engelmanni, and Pseudotsit^n 

 taxifolia. More than 90 specimens have been examined. 



Hopk. U. S. Arizona: Chiricahua Mountains, Flagstaff, 

 Santa Catalina Mountains. California: Las Animas County. 



