119 



Horn.] 1 - L - J [Feb. 21, 



Female. Fifth ventral broadly truncate, sixth slightly emarginate at 

 tip. Hind tibial spurs as in moerens. 



This species occurs in Texas and Mexico and is not rare. 



0. cardinalis, Chev. Col. Mex. Centur, I, 1833, No. 13 ; Lee. Proc. 

 Acad. 1853, p. 447 ; fulvipennis, Lee. loc. cit. p. 331. 



Head black, punctate, shining. Thorax broader than long, sides 

 moderately arcuate and obliquely narrowing to the front, disc feebly con- 

 vex, densely punctate, sparsely pubescent, color black, moderately shining. 

 Elytra opaque, orange red, or fulvous, finely scabro-punctate. 



Body beneath and legs black, moderately shining. Length .60-1.00 

 inch ; 15-25 mm. 



Male. Fifth ventral broadly emarginate, sixth elevated along its middle 

 and acutely notched at tip. 



Female. Fifth ventral truncate, sixth oval at tip. 



Hind tibial spurs as in mcerens. 



Occurs in Colorado, Texas and Mexico. 



0. mtidioollis, Lee. Ann. Lye V, p. 160; Proc. Acad. 1853, p. 332. 



Plead reddish yellow, shining, with few distant punctures. Thorax 

 longer than wide, sides moderately arcuate, gradually narrowed to apex 

 and base, disc moderately convex, smooth shining, color similar to the 

 head. Elytra fulvous, sub-opaque, scabrous. Body beneath and legs 

 black, moderately shining. Length .50-. 70 inch ; 13-18 mm. 



Male. Fifth ventral very slightly emarginate, sixth with slight cres- 

 centic notch, lateral lobes feebly prominent. 



Female. Unknown. 



Inner spur of hind tibia} slender acute, outer cylindric compressed, 

 longer than the inner and concave at apex. 



By their elongate form this and the two following species resemble 

 Epicauta. 



Occurs at San Diego, California. 



0. lugens, Lee. Ann. Lye. V, p. 161 ; Proc. Acad. 1853, p. 335. 



Black, moderately shining. Head sparsely coarsely punctate. Thorax 

 black, longer than wide, sides in front moderately arcuate, behind nearly 

 parallel, disc moderately convex with coarse punctures sparsely placed. 

 Elytra elongate black, less shining than the head and thorax, surface 

 coarsely scabrous. Body beneath and legs black, moderately shining. 



Length .40-.54 inch ; 10-14 mm. 



Male. Fifth ventral broadly truncate, sixth slightly emarginate at tip. 



Female. Fifth ventral truncate, sixth oval at tip. Spurs of hind tibia' 

 slender, outer scarcely thicker. 



Occurs at San Diego, California. 



0. Kathvoni, Lee. Proc. Acad. 1856, p. 335. 



Head brilliant metallic green, sparsely punctured. Thorax longer than 

 wide, sides in front arcuate, .behind slightly converging to base, disc con- 

 vex, very sparsely punctate, color as the head. Elytra elongate parallel, 



