346 MEMOIRS ON THE COLEOPTERA 



Mr. Schaeffer as occurring at Palmerlee, Arizona (Bull. Bk. Inst., 

 I, p. 162) and with the usual great color variability, which, in the 

 light of the above statements, is probably in large part sexual in 

 origin. 



Stenosphenus Hald. 



An extensive genus in the warmer parts of North America and 

 having rather mixed affinities; the spinose antennae suggest some 

 of the next tribe, and other features recall Elaphidion, but, on the 

 whole, it is very isolated and without close allies. The two fol- 

 lowing species have not yet been described : 







Stenosphenus lucanus n. sp. Rather stout, less parallel than dolosus 



Horn, shining, deep black, the prothorax above and beneath bright red, 

 the femora piceo-rufous, the anterior brighter than the others, the outer 

 face of all the tibiae with a fine strong entire carina, abbreviated apically 

 only on the anterior; head strongly, densely punctate, with the usual 

 fine raised median line; antennae (cf ) not quite one-half longer than the 

 body, very slender, of the usual structure, the spines small and slender; 

 prothorax widest rather behind the middle, not quite as long as wide, 

 the sides evenly rounded, more converging anteriorly, the apex three- 

 fourths as wide as the base, the basal constriction moderate; punctures 

 rather small but perforate, sparse, very irregular in distribution; elytra 

 wider than the prothorax, rather strongly narrowed from base to apex, 

 not quite two and one-half times as long as wide, rather coarsely, strongly 

 punctate, the punctures closer medially and externally on each elytron, 

 sparse toward the suture, the apices obliquely truncate and strongly 

 bispinose. Length (cf) 10.0 mm.; width 2.5 mm. Lower California. 



Not closely allied to any other and differs from rufipes Bates in 

 its less coarsely punctate pronotum, shorter antennae and other 

 features. The prosternum of the male has a depressed and very 

 isolated, transversely oval and coarsely, densely punctate areola 

 midway between each coxa and the anterior margin. 



Stenosphenus pruddeni n. sp. More elongate than lucanus, not 

 parallel, shining, pale rufous, the elytra and abdomen piceous; head 

 rufous, black basally, coarsely, closely punctate between the median 

 line and the eyes; antennae ( 9 ) at least a fifth shorter than the body, 

 joints three to seven spinose; prothorax as long as wide, the sides feebly 

 converging and broadly, feebly arcuate between the distinct basal and 

 apical constrictions, the punctures coarse and conspicuous, rather sparse 

 but very uneven in size and distribution, with a broad impunctate median 

 line; scutellum semicircular, densely pubescent; elytra much wider than 

 the prothorax, but little narrowed from the base, two and two-thirds 

 times as long as wide, transversely truncate and very minutely bidentate 

 at apex, the punctures strong, only moderately sparse, closer on the flanks, 



