140 GEO. H. HORN, M. D. 



ginate witli obtuse angles, sides feebly arcuate margin narrowly depressed, 

 disc smootli median line distinctly impressed, basal impressions double moder- 

 ately deep, the inner longer, not separated at base, between them a few punc- 

 tures. Elytra oval, broadest at middle, base very little wider than the thorax, 

 humeri obtuse, sides moderately arcuate, apex obtuse at sides sinuate; disc 

 moderately convex, striate, strise not punctured. Three dorsal punctures, the 

 posterior two on the second stria the anterior on the third. Prosternum feebly 

 margined at tip. Thorax beneath very sparsely punctulate. Abdomen smooth, 

 sparsely punctulate and wrinkled at the sides. Posterior tarsi with two joints 

 grooved on the outer side. Body apterous. Length .54 inch; 1.3.5 mm. 



On comparison with permnndus this species is totally black without 

 iridescence, thorax more convex not narrowed in front, basal impres- 

 sions deeper, the outer especially more evident, the margin less de- 

 pressed ; the elytra are more oval, more convex, humeri obtuse, striae 

 less deep and intervals less convex. 



Taken abundantly near Allegheny City, Pennsylvania, by Dr. John 

 Hamilton. 



P. agonus n. sp. — Oblong black, feebly shining. Thorax one-third wider 

 than long, apex feebly emarginate with obtuse angles, base truncate with 

 broadly rounded angles, sides regularly arcuate, margin broadly depressed 

 posteriorly including the outer basal impression, inner impression moderate, 

 slender in front, broader behind, a very few obsolete punctures along the base 

 and side margin, disc moderately convex, feebly transversely wrinkled. Elytra 

 oval broader behind the middle, feebly striate, striae finely punctured, intervals 

 flat, alternately with distant interruptions, the third with four deep punctures. 

 Body beneath black, shining obsoletely wrinkled. Femora red, tibise and tarsi 

 black. Length .40 inch; 10 mm. (PI. Ill, fig. 2). 



This species is allied to punctatissimuR from which it differs in its 

 smaller size, form of thorax and many other characters. It is peculiar 

 in having the hind angles of the thorax very broadly rounded. 

 One specimen from Yukon River, Alaska, given by Mr. H. Ulke. 



HARPAI.IJS Latr. 

 H. obliquilS n. sp. — Pitchy black, shining, antennae and legs ferruginous. 

 Head moderate, sparsely punctate. Thorax cordate one-third wider than long, 

 sides in front arcuate, posteriorly oblique margin very narrow, base narrower 

 than the apex, hind angles not prominent, basal angular impressions moder- 

 ately deep, somewhat triangular and punctured, median line distinctly im- 

 pressed, a few punctures along the basal margin, disc moderately convex 

 shining. Elytra oval, humeri obtusely rounded, apex feebly sinuate, surface 

 striate, strise impunctured, intervals slightly convex, a single dorsal puncture 

 at posterior third on the third interval near the second stria. Body beneath 

 pitchy black, smooth, abdomen with a few punctures near the base, and at 

 sides bearing accessory setae. Mentuiu without tooth. Length .40 inch ; 10 mm. 

 (PI. Ill, fig. 3). 



This species is totally unlike any other in our fauna by the form of 

 the thorax, the sides being very oblique posteriorly forming a broad 



