OF WASHINGTON, VOLUME XIV, 1912. 39 



Hopk. U. S. California: Yosemite Valley. 



U. S. N. M. Arizona: Williams (Barber &Schwarz). 



Lasconotus simplex LeConte. 1866, p. 378. 



Readily recognizable by its linear form, acute, narrow, equally 

 elevated, odd interspaces of the elytra and the very coarse strial 

 punctures. It is at once separated from planipennis by its 

 smaller size, narrower form, shallower pronotal impression, 

 and less conspicuous pubescence. A series of 11 specimens 

 show more than the usual specific variation. Some specimens 

 have the prouotum more narrowed posteriorly, the median 

 impression deeper and nearly attaining anterior margin, and 

 the sculpture stronger throughout. Associated with Pityoph- 

 tlionis sp. in Pinus pondcrosa and P. strobiformis. 



Hopk. U. S. Arizona: Santa Catalina Mountains, New 

 Mexico: Cloudcroft. 



U. S. N. M. Arizona: Chiricahua Mountains (Hubbard& 

 Schwarz). New Mexico. 



Lasconotus planipennis, new species. 



Type: No. 14190, U. S. N. M.; Hopk. U. S., No. 5097. 

 One of eight specimens collected by J. L. Webb at Grand 

 Canyon, Arizona. 



The main differences between this species and simplex are 

 pointed out under that species. A series of 24 specimens 

 showing some variation, more especially in size and color. 

 Associated with scolytids in Pinns edtilis, murravana, and 

 strobiformis. 



Hopk. U. S. Arizona: Grand Canyon. California: Del- 

 glades. New Mexico: Capitan Mountains. South Dakota: 

 Black Hills, Elmore. Wyoming: Hayden National Forest. 



U. S. N. M. California: Lake Tahoe (Hubbard & Schwarz). 

 New Mexico: Las Vegas Hot Springs (Barber & Schwarz). 



Lasconotus fiskei, new species. 



Type: No. 14191, U. S. N. M.; Hopk. U. S. No. 3868. 

 One of 12 specimens collected by W. F. Fiske at Montell, 

 Texas. Intermediate between the preceding and the next 

 species. It is smaller and stouter than simplex, having elytral 

 characters similar to the following species, but the fifth inter- 

 space is less elevated and the dorsal area of elytra is flat, not 

 concave. Associated with Pityophthorus sp. in Pin us ediili*. 



In naming this species for Mr. W, F. Fiske I wish to ac- 

 knowledge the use of the manuscript notes which he had pre- 

 pared on this genus, and which have been of great assistance 

 on several of the species. 



