NATURAL SCIENCES OF PHILADELPHIA. 373 



remarkable ; in the female the punctures are large and deep, and about as 

 closely placed as on the elytra ; in the male the punctures are replaced by 

 elevated smooth granules, and the disc is very broadly depressed, or slightly 

 concave. The antenna? in both sexes are longer than the head and thorax, 

 moderately thickened externally, brown, with the basal joints reddish. The 

 head is black shining, coarsely punctured each side, and smooth in the middle ; 

 it is but slightly narrowed behind. The thorax is transverse, about one-half 

 wider than the head, rather flat, with all the angles rounded ; the dorsal chan- 

 nel is well marked. The elytra are coarsely and deeply punctured. The ab- 

 domen is moderately strongly but sparsely punctured ; the punctures are evenly 

 distributed in the female, leaving only a narrow apical margin of the segments 

 smooth ; but in the male they are accumulated at the base and sides of the 

 segments, leaving a wide apical margin and medial space smooth. 



In one specimen the elytra are blackish only at the sides and tip, the rest of 

 their surface being ferruginous. 



EURYUSA Er. 



Eu. obtusa, linearis, depressa, punctulata subtiliter pubescens, picea, 

 pedibus, thorace elytrisque fusco-ferrugineis, his versus latera et ad scutellum 

 infuscatis ; thorace latitudine fere duplo breviore, coleopteris hand latiore, ante 

 medium rotundatim angustato, basi late rotundata, angulis posticis obtusis, 

 ante basin transversim leviter foveato ; abdomine versus apicem pilosello, ano 

 pallidiore, segmentis ventralibus margine postico testaceo ; antennis fuscis, 

 basi vix pallidioribus. Long. 3-5 mm. 



Pennsylvania ; a specimen found at Columbia was given to me by Professor 

 S. S. Haldeman. The antennae are longer than the head and thorax, and not 

 much thickened externally; the joints 1 3 are nearly equal in length ; 4 10 

 somewhat shorter and gradually thicker, the outer ones but slightly wider than 

 their length ; eleventh twice as long as the tenth, pointed at the end when 

 viewed laterally. The thorax is much wider than the head, flattened, nearly 

 twice as wide as its length, very feebly channelled, rounded on the sides, es- 

 pecially before the middle, broadly rounded at the base. Hind angles obtuse, 

 not rounded, but not very well marked ; a feeble transverse impression is seen 

 near the middle of the base. The elytra are as long as the thorax. The dorsal 

 ventral segments are more finely punctulate than the thorax and elytra, nearly 

 smooth towards the extremity, and furnished with erect long hairs ; ventral 

 segments finely punctured, margined behind with testaceous. Feet and palpi 

 uniform reddish testaceous. 



Another specimen from the same locality is paler, the abdomen being of the 

 same color as the head and thorax, with a fuscous cloud on the fourth sixth 

 dorsal segments ; the hind angles of the thorax are less obtuse and very well 

 marked, the base being feebly sinuate near the sides. There is no conspicuous 

 difference otherwise, and I am disposed to regard it as the male of the type. 



H0M(EUSA Kraatz. 



H. expansa, lata, postice sensim attenuata, parnm convexa, testacea 

 nitida fortiter punctulata, subtiliter pubescens, thorace latitudine duplo breviore 

 antrorsum angustato, lateribus valde rotundatis, basi bisinuata angulis posticis 

 acutis productis ; elytris thorace paulo brevioribus, angulo apicali externo acute 

 producto ; abdomine capite thoraceque vix longiore, vix punctulato, longe pilo- 

 so ; antennis fuscis, basi apiceque testaceis, thorace haud longioribus, extror- 

 sum valde incrassatis. Long. 1-5 mm. 



Two specimens found near Washington, D. C, in ants' nests, by Mr. Ulke, 

 who has liberally placed one of them in my collection. The dorsal surface of 

 the abdomen is a little darker than the thorax and elytra. This species is 

 Dinarda pedicula ria Dej., Cat. 



GYMNUSA Grav. 



G. b r e v i c o 1 1 is Mannh. A specimen was collected at Ottawa, C. W., and 

 1866.] 



