74 MEMOIRS ON THE COLEOPTERA 



narrower than the elytra in both sexes, fully a third to two-fifths 

 wider than long, nearly similar in outline and surface and with 

 similarly notably converging sides toward base, where however 

 they become straight and not feebly arcuate as in all the preceding 

 species, the angle obtuse but sharp and generally slightly prominent 

 externally; diffused latero-basal punctures distinct, the foveae large 

 and feeble as usual; elytra three-fifths to two-thirds longer than wide, 

 parallel and broadly rounded at the sides, barely at all less shining 

 in the female than in the male, the surface throughout nearly as in 

 acomanus, the tarsi nearly similar. Length (cT 9 ) 12.0-16.0 mm.; 

 width 4.0-5.8 mm. New Mexico and Arizona. Thirteen examples. 



[Harpalus impiger \\ Lee.] retractus Lee. 



Sides of the prothorax conspicuously sinuate posteriorly, becoming 

 parallel and straight for a considerable distance before the angles, 

 which are absolutely right and sharply marked, not at all prominent 

 externally. Body (cf) unusually narrow in form, moderately 

 convex, shining, piceous-black, red-brown beneath, the legs tes- 

 taceous; head nearly as in the preceding and similarly with the 

 shallow concavity surrounding the small deep punctiform frontal 

 foveae obsolete; prothorax only about a fourth wider than long, the 

 sides broadly rounded anteriorly, the base fully as wide as the apex 

 and distinctly sinuato-truncate, finely but deeply margined; latero- 

 basal punctures strong and close-set; elytra not quite a fourth wider 

 than the prothorax, nearly three-fourths longer than wide, parallel, 

 with broadly rounded sides, the apical sinus broadly curved exter- 

 nally, with the obtuse angle rounded; striae deeply impressed, the 

 intervals strongly convex and polished; humeri, as usual, not in the 

 least denticulate. Length (c?) 13.3 mm.; width 4.7 mm. Arizona. 

 A single specimen rectangulus n. sp. 



In his original description of retractus (Proc. Acad. Phila., 1854, 

 p. 79), under the name impiger, LeConte states that the elytra 

 are unipunctate. Among the rather numerous examples of the 

 various species before me, I am unable to discover a single discal 

 setigerous puncture and am therefore at a loss to account for the 

 statement quoted. In most of the species there is no great sexual 

 disparity in the size of the body, but in retractus this becomes a very 

 conspicuous character of the species. The mentum usually has a 

 small or very short and more or less obtuse tooth, which in retractus 

 is broadly rounded. 



Group III (viridicBneus) . 

 Subgenus Harpalophonus Gangl. 



Our single representative of this group, which is much more 

 developed in the palsearctic fauna, is a small, parallel and rather 



