300 II. C. FALL. 



Thorax less convex, a little longer than wide; color deep blue or black. 

 Length 8-15 nun. Hub. — Pacific Coast region from Washington 



to San Francisco iiifidelis. 



Antennse of 'J, 'very strongly compressed ; joints 5-10 about twice as wide as 

 long; scute.lluni feebly sulcate. Length 8-12 mm. ii"a&.— Cali- 

 fornia (Owen's Valley) coinpressiroriiis. 



Anterior tibise of % without terminal spurs; antericn- femur of %, with sjiine 

 near the base. Length 12 mm. Hah. — Texas, Colorado. 



cunvexa. 

 C |>eniii!iiulariN sp. nov.— Black; head ^except anteriorly) and thorax 

 red, surface feebly shining. Head quadrate, parallel behind the eyes, sparsely 

 finely punctulate. Thorax slightly narrower than the head, subpentagonal with 

 the side angles broadly rounded, disk flattened with four rather feeble impres- 

 sions, the lateral ones usually distinct, the basal and apical ones nearly obsolete; 

 punctures very few and fine. Elytra finely scabrous, a little smoother at base. 

 Lower surface finely, moderately closely punctulate and pubescent, the meta- 

 sternura— except along the median line — and the coxae and basal parts of the 

 femora with denser and longer pubescence than usual. Tarsi slender; hind 

 tibial spurs very unequal, the outer stout, cylindrical, broader at apex, which is 

 obliquely truncate and concave. 



Male. — Antennge longer and more slender, joints 4-10 triangular shorter, 4-7 

 produced a little at the apex on the lower (inner) side, their inferior outline 

 thereby distinctly arcuate; eleventh joint very narrow and pointed, about as 

 long as the seventh ; fifth ventral broadly emarginate, sixth acutely and rather 

 deeply notched; pygidinm rounded at apex. 



Female. — Antennae shorter, relatively stouter, joints 4-7 not modified ; fifth 

 ventral truncate, sixth with a small subtriangular emargination. Length 18- 

 22 mm. 



Hah. — Cape San Lucas, Lower California. 



This species was given me several years ago by Mr. Fuchs as 

 mutilata. The latter has quite different male antennae, the head is 

 widened behind, the pubescence of the lower surface is shorter and 

 the tarsi stouter. In the female the antennal joints are rounded in 

 mutilata, and more elongate and subtriangular in peninsularis. The 

 male ventral characters are also quite different. 



C inargarila sp. nov. — Head and thorax red, labrum and epistoma 

 black, elytra black, coarsely reticulate. Head and thorax sparsely punctate, the 

 latter strongly angulate at sides and with three acute tubercles along the side 

 margin posteriorly. Outer spur of hind tibiae very much broader than the inner 

 one and thinned or laminate from the base. Length 24 mm. 



The single example is a male having the fifth ventral sinuate, and 

 the sixth with a shallow emargination which is very obtusely angu- 

 late at bottom. The antennae are scarcely perceptibly thickened at 

 middle, and for this reason the species would perhaps be more ap- 

 propriately referred to Group II. It is, however, so much like 



