DYNASTIN.E 171 



and Iowa. Very abundant and variable in size. [ Chalepus 



trachypygus Burm.] trachypygus Burm. 



A Similar but rather more elongate, the elytra of the female very 

 much less prominent at the sides submedially and with the punc- 

 tures limiting the costules widely separated in the series, the 

 punctures of the intervals also larger and less numerous; pygidium 

 similar, except that the intricate smooth area extends throughout 

 the apical part medially. Length (9) 14.7 mm.; width 8.0 mm. 



Pennsylvania discedens n. subsp. 



Form much narrower, more elongate and more oval than in trachypygus, 

 the surface rather more convex and more highly polished, somewhat 

 pitchy-black; head distinctly more than half as wide a? the prothorax, 

 strongly, sparsely punctate, the clypeus nearly similar but a little 

 shorter and still more declivous antero-laterad, the suture obliterated 

 or lost in some confused punctuation medially; prothorax shorter 

 and narrower, the sides more converging from base to apex and more 

 strongly arcuate, the basal angles similar; sparse punctures even 

 coarser and deeper, conspicuous; scutellum very acutely ogival; 

 elytra more elongate, a third longer than wide, circularly rounded 

 behind, fully a fourth wider than the prothorax, the sides as in the 

 preceding species, the sculpture nearly similar but with the surface 

 much more polished; pygidium similar and likewise with excessively 

 minute, sparse and erect hairs; anterior tarsi of the male with the 

 claw-joint slightly less inflated. Length (d 1 ) 14.5 mm.; width 7.3 



mm. New York borealis n. sp. 



Form nearly as in trachypygus but rather more elongate, with more de- 

 veloped head and larger, more prominent eyes; head much more than 

 half as wide as the prothorax, with rather strong sparse punctures 

 throughout; clypeus nearly similar but somewhat impressed trans- 

 versely at base; prothorax scarcely three-fourths wider than long, 

 the sides evenly and moderately converging and feebly, evenly 

 arcuate from the rather broadly rounded basal angles to the apex; 

 punctures everywhere uniform and rather coarse and deep, well 

 separated; scutellum ogival, almost punctureless; elytra about a fifth 

 longer than wide and fully a fourth wider than the prothorax, cir- 

 cularly rounded behind, the sides distinctly more arcuate and 

 prominent very near the middle; sculpture as in trachypygus but 

 with the punctures smaller and relatively still sparser, those of the 

 series bounding the very feebly convex costules similarly extremely 

 close-set; pygidium very densely and finely scabriculate and opaque 

 throughout, having near the apex two widely separated tumors, 

 which are irregularly and intricately smooth nearly as in trachypygus 

 but much less extendedly, the tumors more abruptly formed than in 

 that species. Length (9) 19.0 mm.; width 9.8 mm. Guatemala 



(Toyahaj) *bitumorosus n. sp. 



II Prosternal process dilated, oval and flattened at apex: that is, of the 

 usual form in the genus. Body oblong, strongly convex, moderately 

 shining, black throughout; head short, the eyes small, the front with 

 fine, transversely interlacing rugulae; clypeus very short, unusually 

 declivous antero-laterad, smooth and sculptureless, biobliquely, 



