HARPALIISLE 133 



surface black, the head and sides of the prothorax slightly rufescent, 

 the under surface piceous, the legs and cephalic appendages pale 

 testaceous; head as in dichrous but with still longer, very slender 

 and filiform antennae and only a little more than half as wide as 

 the prothorax, which is much larger, fully as wide as the elytra, a 

 little more than two-fifths wider than long, more inflated anteriorly 

 and slightly more narrowed basally, the sides rounded, becoming 

 feebly so basally; apex sinuate as in the preceding but with more 

 broadly rounded angles and much less obviously narrower than the 

 base, which is similar and with slightly obtuse and moderately 

 rounded angles; surface nearly similar and with well marked, nearly 

 entire stria and rather distinct anterior transverse impression, but 

 with the sides still more coarsely reflexed, feebly punctulate, the 

 deep gutter becoming obsolete near basal third on the rather flat- 

 tened latero-basal surface, which is sparsely but somewhat strongly 

 punctured from the sides almost to the middle and with two impres- 

 sions, the regular foveae deeper, more linear and more distinct than 

 in dichrous, and, between each and the sides, another feeble discal 

 impression; the punctures are much sparser and less conspicuous 

 toward the sides than in the preceding; elytra nearly as in dichrous 

 throughout, except that they are slightly more elongate and with 

 the puncture at apical third; abdomen similarly smooth and almost 

 punctureless, the basal joint of the hind tarsi not quite so long, 

 being barely as long as the next two combined; mentum tooth 

 rather narrow and strong but obtuse at tip. Length (9 ) n.o mm.; 



width 4.1 mm. Missouri (St. Louis) fluvialis n. sp. 



Body black, elytra iridescent; legs piceous, the antennae and palpi pale; 

 head narrower than the prothorax, impunctate, shining; piothorax 

 about twice as wide as long, the sides evenly arcuate, the hind angles 

 obtuse, rounded; basal impression rather deep ajid linear; surface 

 shining, without punctuation, except a very few punctures between 

 the basal impressions; elytra shining in both sexes and iridescent, 

 the striae deeply impressed, not punctate, the fovea distinct and on 

 the second stria; intervals slightly convex; body beneath smooth, 

 shining, the abdomen without accessory setae, not punctulate basally; 

 mentum with the sinus broadly arcuate at the bottom; anterior and 

 middle tarsi (cf ) dilated and biseriately squamulose. Length n- 

 11.5 mm. Texas (Brownsville) iripennis Schf. 



The description of iripennis is drawn from the original, as I do 

 not know the species in actuality; the prothorax is apparently much 

 more transverse and the mentum tooth more obsolete than in the 

 other species, but it seems to belong to the present genus; the basal 

 joint of the hind tarsi is not described. In a strong light an almost 

 complete solar spectrum is displayed on the elytra of dichrous, 

 where the strigilation producing the play of color is rather stronger 

 than in the others, although it is very distinct and characteristic in 

 all of them. 



