40 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Lasconotus bitomoides, new species. 



Type: No. 14192, U. S. N. M.; Hopk. U. S., No. 5018c, 

 collected by J. L. Webb at Flagstaff, Arizona. 



A remarkable species resembling in general appearance a 

 Bitoma. This species and the preceding show the beginning 

 of the characters of iht pusillus group, the reduction of inter- 

 spaces 1 and 3, and the strong elevation of 5. The elevated 

 oblique ridge from interspace 5 to the apex is a striking char- 

 acter and very strongly developed. It is broader and stouter 

 than fiskei and at once separated from that species by the con- 

 cave elytra, also the two small but parallel costse extending 

 from the posterior margin together with the more distinct 

 median impression. Two specimens; associated with scolytids 

 in Pinus edulis. 



Hopk. U. S. Arizona: Chiricahua National Forest, Flag- 

 staff, Santa Catalina National Forest. New Mexico: Capitan, 

 Capitan Mountains. 



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



Lasconotus subcostulatus, new species. 



Type: No. 14193, U. S. N. M.; Hopk. U. S. No. 5286b. 

 One of 8 specimens collected by J. L. Webb at Centerville, 

 Idaho. 



This species and pusillus, though closely allied, are distinct 

 and readily separated by the characters outlined in the synop- 

 sis above. The slender form, more elevated first and third in- 

 terspaces, less concave elytra, broad median impression of the 

 prothorax, and its peculiar punctatiou, serve to separate it at 

 once from laqueatus, with which it has been confused. See 

 also under laqueatus below. A series of a hundred speci- 

 mens, all remarkably constant, slight variation in size, a few 

 have the strial punctures more marked, but they are very dis- 

 tinct in all. In Pinus pondorosa, monticola, mttrrayana, and 

 Picea sitchensis, associated with scolytids. 



Hopk. U. S. California: Summerdale, Yosemite Valley. 

 Colorado: Boulder. Idaho: Centerville, Kootenai. Montana: 

 Missoula. Oregon: Grant's Pass. South Dakota: Black Hills, 

 Elmore, Lead. Washington: Buckeye, Hoquiam. 



U. S. N. M. California: Placer County, Sacramento (Hub- 

 bard & Schwarz, Koebele). Nebraska: Pine Ridge (Soltau). 

 Oregon: Hood River. Washington: Spokane Falls (Hubbard 

 & Schwarz). 



Lasconotus pusillus LeConte. 1863, p. 57. 



Closely allied to the preceding, but very distinct, as out- 

 lined under laqueatus. LeConte gives "Southern States, 



