AMERICAN COLEOPTERA. 167 



wide, quadrate, densely clothed on the flanks with decumbent white 

 hairs, sparsely hairy above, not protuberant at base ; elytra oblong, 

 sides moderately arcuate, apex oblique, slightly sinuate $ , eraargi- 

 nate laterally $ , the subapical angles rectangular; surface even, 

 except for the slight subhumeral impressions, punctate, except in 

 the white markings, with closely placed punctures, which, when 

 microscopically examined, are themselves most minutely punctulate 

 with metallic green or cupreous points, which cause a changing 

 color as the insect is moved ; beneath densely clothed with decum- 

 bent hair, except the middle of the abdomen, even the sides of the 

 head below the eyes being covered. 



This species resembles sperata, but is shorter and broader and 

 much more heavily marked. The emargination of female elytral 

 apex is similar to that of spercda, but the subapical angle is less acute. 



This species was discovered by Mr. Warren Knaus of MacPher- 

 son, Kansas, and was mentioned by him as a variety of sperata 

 (Can. Ent., p. 114) a year ago. It is with pleasure that I dedicate 

 it to him as a testimonial of the high appreciation in which I hold 

 the painstaking work he has done among the Kansas tiger beetles. 



C. inquisitor Casey, 1897, /. c, p. 298. 

 Length 12-14 mm.^.48-.56 inch. 



Habitat. — Austin, Texas. 



"Closely allied to sperata, but stouter, with a broader head, still 

 " more prominent eyes and more protuberant sides of the prothorax 

 "at the basal angles. The female has the external angulation near 

 " the apex of the elytra rounded, while in sperata this angle is 

 "acute, even inclining slightly backward at the extreme apex." 

 (Casey). 



My specimens are from Austin and correspond exactly with the 

 description. The protuberant basal angles of the thorax are nota- 

 bly evident in the female and are a remarkable character on the 

 existence of which I retain this species as distinct. Otherwise it 

 would be difficult to separate it from sperata. 



C. sperata lW., 1856, Trans. Am. Phil. Soc, xi, 50 ; Horn, I. c, p. 239 ; Schaupp, 

 Lc. p) 102, pi. 4, fig. 87. 

 Length 10-13.5 mm.=.40-.54 inch. 



Habitat— R\o Grande, N. Mex., Tex., Ariz., Cal. (Yuma), June 

 and July. 



TEANS. AM. ENT. SOC, XXVIII. JUNE, 1902. 



