436 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Distribution. — Colorado: Veta Pass; Glenwood Springs, July (Fenyes); 

 Leadville 10,000-11,000 feet, July 7 to 14; Salida, July 6 (Wickham); Grand 

 Lake (type of laevicollis Bowditch in Bowditch Coll.); "Col" (Leng Coll.). 

 New Mexico: Cloudcroft, 9,000 feet, Aug. (Knaus); Las Vegas Range, 11,000 

 feet (Cockerell); Las Vegas Hot Springs, July and Aug. (Snow Coll.), Aug. 2 

 (Nat. Mus. Coll.); Beulah (Beyer Coll.), (Van Dyke CoU.). Arizona: Wil- 

 liams, July (Barber & Schwarz); Huachuca Mountains, 9,000 feet, July 20 

 (Schaeffer). 



The large size, polished surface, generally confused punctuation 

 and yellow legs make this species easily recognizable, although an 

 unusually variable one as regards maculation. This species is 

 undoubtedly the renidens of LeConte, but a specimen from 

 Mexico (Ciudad Durango) which is quite surely identical with 

 my most heavily marked example of renidens (Las Vegas Range, 

 N. Mex.) is labeled varicolor Suffr. by Bowditch, doubtless on 

 the authority of Jacoby, who had seen a Suffrian type. More 

 recently, similar specimens, determined by Jacoby, have been 

 sent me directly from the British Museum by Mr. Gahan. 



In our specimens the legs are pretty uniformly j^ellow but in 

 some Mexican specimens the femora are ringed with blackish — 

 as is stated in Suffrian's description of the species. 



Laevicollis Bowd. is nearly typical renidens Lee. and therefore 

 varicolor Suffr. 



117. Pachybrachys lustrans LeConte 



Black, variegated with bright yellow, the black color usually 

 predominant, integuments polished; eyes separated by fully 

 twice the length of the basal antennal joint in the male; ocular 

 lines wanting, front with more or less evident transverse impres- 

 sion near the upper limit of the eyes; front claws of male not 

 enlarged. Ave. length 4 mm. California. 



Head black with small yellow marks, moderately punctate; eyes separated in 

 the male by slightly more than twice the length of the basal antennal joint as 

 a rule, in the female by about three times the length of the basal joint. An- 

 tennae thin, in the male fully three-fourths and in the female about two- 

 thirds the length of the body, black, more or less rufous toward the base, 

 especially beneath; tenth joint two and one-half times as long as wide. 



Prolhorux strongly transverse, especially in the female, feebly to moderately 

 narrowed in front, slightly contracted at base; pimctuation rather fine, not 

 very close, side margins nearly smooth. The color may be described as yellow 

 with heavily marked M, or black with the front margin very narrowly, side 

 margin more widely, median line anteriorly and two small basal spots, yellow. 



