HARPALIN/E 159 



4 Body very stout in form and usually of rather large size, the basal 



thoracic angles broadly rounded 5 



Body much more slender and small in size, never so much as 10 mm. in 



length 



5 Prothorax about as wide at apex as at base .... 6 



Ptothorax distinctly narrower at apex than at base 7 



6 Elytra broader than the prothorax ( 9 ) or equal thereto (cT). Body 

 stout, oblong, strongly convex, shining, black in color and without 

 trace of metallic lustre; under surface and legs nearly black, some- 

 times slightly red-brown from immaturity; head not quite three- 

 fifths as wide as the prothorax, the eyes relatively moderate in size 

 and convexity; prothorax less than two-fifths wider than long, the 

 sides almost evenly arcuate though gradually a little less so pos- 

 teriorly than anteriorly, the base finely margined, broadly, feebly 

 sinuate medially, the basal fovese shallow but evident, feebly 

 punctate, the surface narrowly and feebly subexplanate at the hind 

 angles; elytra about twice as long as the prothorax, obtusely ogival 

 at apex, the sinus very feeble; striae rather coarse and deep, the 

 scutellar rather long S.nd strong, the intervals feebly convex, the 

 setigerous punctures distinct; middle tibiae (cf ) moderately arcuate 

 and granulo-serrate within; basal joint of the hind tarsi long as 

 usual. Length (cf 9 ) 9.0-11.0 mm.; width 3.4-4.2 mm. Arizona 



(southern). Abundant. Ten examples robustus Horn 



A Similar but somewhat narrower, with a slightly smaller head and 

 generally of a pale and uniform red-brown color, occasionally 

 nearly black but always much paler beneath, the legs rufous; pro- 

 thorax slightly narrower than the elytra in both sexes; middle 

 tibiae (cf) nearly similar, the hind tarsi slightly more slender. 

 Length (cf 9 ) 9.0-11.5 mm.; width 3.4-3.9 mm. Arizona (near 

 Benson), Dunn. Abundant. Twelve examples. . .piceusn. subsp. 

 Elytra as wide as the prothorax, apparently in both sexes; size larger. 

 Form robust, convex, piceous, shining, without trace of metallic 

 surface lustre; antennae, palpi and usually the labrum, castaneous; 

 head impunctate, the frontal impressions very short; prothorax 

 quadrate, slightly wider than long, somewhat narrowed at base, 

 widest at one-third from the apex, the sides regularly arcuate, the 

 margin not depressed; surface smooth, convex, the median impression 

 faint and short, the basal impressions broad but shallow and vague; 

 elytra not wider than the prothorax, the sides feebly arcuate, the 

 surface convex, finely striate, the striae impunctate, the intervals 

 smooth, very feebly convex, the inner sides of 3, 6 and 8 with the 

 usual punctures fine and rather indistinct; under surface slightly 

 paler, shining; prosternum not margined at tip but with two usually 

 conspicuous bristles on each side; abdomen very sparsely punctate, 

 with coarser punctures on the intercoxal process, the last segment 

 with two setae on each side at tip. Length 12.5 mm. Arizona 



(southern) crassicollis Horn 



7 Body very stout and convex, deep black and somewhat alutaceous, 

 without trace of metallic lustre; head deep black, with the labrum, 

 palpi and antennae castaneous-red, well developed, rather more than 



