42 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Hopk. U. S. Colorado: Boulder. New Mexico: Capitan, 

 Meeks. Texas: Davis Mountains. 



U. S. N. M. Nebraska: Pine Ridge (Soltau). 



Lasconotus concavus Casey. 1890, pp. 315-316. 



A robust species showing the extreme development of the 

 characters of the pusillns group. Interspace 1 is just visibly 

 elevated, 3 elevated at base for about one-sixth its length, and 

 5 very strongly elevated from base to near apex; the strial 

 punctures are just traceable. The prothoracic impression is 

 very broad, with punctures fine and simple. A series of about 

 125 specimens. Commonly associated with scolytids in Pinus 

 ponderosa and strobiformis . 



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

 staff, San Francisco Mountains, Williams. Colorado: Mancos. 

 New Mexico: Capitan, Capitan Mountains, Meeks, Vermejo. 



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

 &Schwarz), Bright Angel, Williams (Schwarz & Barber). 

 New Mexico: L,as Vegas Hot Springs (Schwarz & Barber). 



Lasconotus atomus Grouvelle. 1908, p. 49. 



I have not seen a specimen, but it is apparently distinct 

 from any of the species occurring in the United States. I 

 quote the following from Grouvelle's description: 



Elongate, parallel, moderately convex, feebly shining, ferruginous, 

 a little smoky; antennas, except the club, and the legs more reddish. 

 Antennal club smoky, first segment narrower than the two following. 

 Head granulate, wider than long at the level of the eyes, sides 

 straight, converging anteriorly, anterior margin rounded, on the disc 

 five impressions somewhat confluent, two anteriorly and three in line 

 on the summit of the head. Prothorax granulate, the form of an in- 

 verted trapezoid, just about as long as wide anteriorly, anterior mar- 

 gin rounded, feebly sinuous at the extremities, sides nearly straight, 

 finely margined and crenulate; base truncate, strongly excavated at the 

 extremities; anterior angles feebly produced anteriorly, rounded, 

 posterior almost right, well marked; at the middle of the disc a longi- 

 tudinal furrow well marked anteriorly, and at each side of the furrow, 

 two longitudinal carinaa; the internal less accentuated, divided anter- 

 iorly and posteriorly into two short carinse, the external well marked, 

 entire, flexuose. Scutellum puncture-iike. Elytra parallel, a little 

 less than 3 times as long as wide, when taken together; each with 

 three sensibly equal discoidal carinse, the first attaining the apical 

 margin of the elytra, the two others united before attaining that 

 margin, intervals between the carinas with two lines of large punc- 

 tures. 



