—132- 



A. linearis Lee. True. Acad. 1859, p. So. Rufo-testaceous, sparsely clothed 

 w nil whitish pubescence. Thorax longer than wide, sides arcuate, disc < oarsely dense- 

 ly punctate, a slight smooth space at middle p >steriorly. Elytra coarsely punctured, 

 the punctures somewhat liner near the apex, the apices separately emarginate- 

 iruncate, not spinose. Length .40 — 42 inch: 10—10.5111111. 



The outer joints of the antennae are distinctly carinate on their flat 

 sides, the third, fourth and fifth joints with a short apical spine. The 

 living- hairs of the tibiae are long but not very numerous. 



Occurs at Tejon, California. 

 A. protensus, Lee. (Proc. Acad. 1658, p. 82.) Brownish piceous, clothed 

 w.th grayish-white pubescence. Thorax longer than wide, scarcely peiceptibly 

 narrower at apex than at base, sides feebly arcuate, sl.ghtly obliquely impressed near 

 the base, disc convex, very coarsely and roughly punctate-granu.ate with four d.stinct 

 elevations arranged in a quadrangle and a narrow median smooth callosity. Llyira 

 coarsely not closely punctate, the punctures gradually finer toward the apex, the 

 apices bispinous (j 1 or with the suture above spiniform O. Length 1 06 rf , 1.20 Q 

 inch. 26.5—30 mm. 



The pubescence of this species is nearly as abundant as in Elaph. 

 atomarium but more regularly placed. The joints three to six of the 

 antennae are distinctly spinous, the spines gradually shorter. The outer 

 joints are distinctly carinate on their fiat sides. 



Occurs in Arizona and northern Sonora. 

 A. prohxus, Lee. n. sp. 1873, p. 203. Piceous, moderately densely clothed with 

 cinereous pubescence with a few longer hairs intermixed. Thorax longer than wide, 

 nearly cylindrical, coarsely and closely punctured, disc moderately convex with two 

 slightly elevated tubercles near the base and a transverse elevated line slightly in front 

 of the middle. Elytra coarsely not closely punctured, the punctures finer posteriorly, 

 the apices bispinous in both sexes. Length 1.00 inch; 25 mm. 



The outer joints of the antennae are very distinctly carinate, the joints 

 three to six with a short spine at apex. The slight transverse elevated 

 line of the thorax is made more conspicuous by the arrangement of the 

 pubescence. 



Occurs at Cape San Lucas, Lower California. 

 A. calvatus, n. sp. Brownish piceous, moderately shining, surface with very 

 tine, sparse and inconspicuous pubescence. Head coarsely punctured. Thorax 

 lunger than wide, base one-half wider than apex, sides feebly arcuate, disc coarsely 

 and roughly punctured with a tendency in the punctures to become transversely con- 

 fluent. Elytra double the width of apex of thorax, parallel, coarsely and deeply, not 

 closely punctate, the punctures finer near the sides and toward the apex, apices bi- 

 spinous in the emargination between the spines and distinct tooth. Body beneath 

 sparsely punctate. Length 1.16 inch.; 29 mm. 



The outer joints ol the antennae are very distinctly carinate on their 

 flat sides, joints three to six distinctly spinous at tip. The legs are feebly 

 pubescent without flying hairs. It is conspicuous among the larger 

 species by the very feeble pubescence of the surface. 



One specimen <J\ Arizona. 



