36 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Colorado: Beulah, Palmer Lake, San Isabel National Forest. 

 New Mexico: Capitan Mountains, Cloudcroft, Meeks, White 

 Mountains. South Dakota: Black Hills, Custer, Elmore, 

 Lead, Nemo. Utah: Panguitch. Washington: Hoquiam. 

 Wyoming: Hayden National Forest. 



U. S. N. M. Arizona: Chiricahua Mountains. 



Lasconotus borealis Horn. (Proc. Amer. Philos. Soc., xvii, 

 1878, p. 570.) 



Medium-sized, slender species, the pronotal structure very 

 similar to Hnearis Crotch, and the elytral structure allied to 

 flexuosus t being, however, relatively more convex and the 

 odd interspaces equally elevated throughout. I have seen 

 but four specimens, one bred from spruce infested by 

 Pityophthorus, from Grand Island, Michigan. Another 

 taken by Mr. E. A. Schwarz on birch or alder at Marquette, 

 Michigan, which Mr. Schwarz tells me is one of two taken by 

 him at the same time. The other was given to Dr. LeConte. 

 Dr. Horn described it and it is now in the LeConte collection. 

 The fourth is in the Horn collection and is from the White 

 Mountains, New Hampshire. 



Lasconotus intricatus new species. 



Type: No. 14188, U. S. N. M.; Hopk. U. S. No. 4020-1, 

 one of three specimens collected by Mr. H. E. Burke at 

 Hoquiam, Washington, under bark of Picea sitchensis. 



This species is very closely allied to borealis, but is readily 

 distinguished by its relatively more slender prothorax and 

 much darker color. 



Lasconotus nucleatus Casey. 1890, p. 314. 



A most remarkable and distinct species. It differs from 

 every other in the genus by its peculiar elytral structure, hav- 

 ing none of the interspaces elevated throughout, but instead 

 the odd interspaces are broader, flattened, but interrupted at 

 long distances by small tumid elevations bearing a dense tuft 

 of whitish setae. 



A series of 15 specimens shows very little variation, except 

 very slightly in size and a few examples have the anterior 

 margins of the prothorax more broadly rounded. Mr. Schwarz 

 tells me he collected the specimens on twigs of Pinns radiata 

 infested by Pityophthorus sp. 



U. S. N. M. California: Eureka (H. S. Barber), Monterey 

 (E. A. Schwarz). Oregon: Astoria (Hubbard & Schwarz). 



