DYNASTIN.E 249 



obtusely rounded clypeal apex with a moderate median nodule; it 

 differs, however, in having the median mandibular tooth broad at 

 base and very much less elevated than usual, being in fact but little 

 higher than the basal width; frontal ridge obscurely evident medially; 

 antennal club shorter than in any other species; prothorax more than 

 one-half wider than long, the longitudinally divided cavity limited 

 postero-externally by obtuse elevations, the apical horn short but 

 longer than the posterior prominences; each of the two cavities is 

 rugose except posteriorly, but otherwise there is no trace of rugosity 

 even at base, excepting occasionally a little on the outer slopes of the 

 posterior processes; oblique sides anteriorly broadly and very feebly 

 sinuate; scutellum smooth, punctured at the extreme base only; 

 elytra nearly as wide as long, distinctly wider than the prothorax 

 and three-fourths longer, the sides unusually arcuate, the apex 

 rounded from the middle; surface smooth; pygidium not three times 

 as wide as long, convex, punctured and with coarse hairs basally as 

 usual, elsewhere with minute scattered punctulation. Female much 

 smaller and narrower than in either of the two preceding species, 

 oblong, moderately convex, castaneous; head nearly as in the male, 

 the clypeus similarly broadly rounded at apex, but the mandibular 

 teeth are still more reduced in size as usual; prothorax shorter, two- 

 thirds wider than long, the oblique sides anteriorly straight, the 

 cavity very deep, more abruptly denned posteriorly than in the pre- 

 ceding species, a third as wide as the disk and extending rather 

 behind the middle, the tubercle very obtuse, not binodose; surface 

 much less rugose than in either of the preceding, smooth, rugose in 

 the cavity and thence more narrowly externally to the apical angles; 

 along the basal bead there are some irregular punctures in approxi- 

 mately single line; elytra relatively much longer than in antceus or 

 pinorum, distinctly longer than wide, equal in width to the prothorax 

 and not quite twice as long, rounded behind the middle; pygidium 

 very short and transverse. Length (4 cf, I 9) 24.0-26.0 mm.; 

 width 12.8-14.8 mm. Length and width of the single female 24.8 by 



13.8 mm. New Jersey septentrionis n. sp. 



7 Male in the fully developed stage elongate, oblong-oval, narrower than 

 in antcetis, black, the elytra dark castaneo-rufous, the under surface 

 paler; surface highly polished; head a third as wide as the prothorax, 

 very coarsely, unevenly rugose, smooth at base, the region of the 

 transverse ridge somewhat more convex, the clypeal apex throughout 

 finely and sparsely punctate, not in the least reflexed even apically, 

 the apex evenly, circularly rounded and, on the surface, having a 

 short slender carina; middle mandibular tooth long, rather acuminate 

 and almost twice as high as wide; prothorax a little more than one-half 

 wider than long, the apex almost tubulate, half as wide as the base, 

 the three horns unusually slender, the apical feebly, evenly arcuate 

 and barely longer than the posterior; median smooth ridge as 

 usual; surface completely smooth and polished, excepting a small 

 area of rugosity at each side of the base of the apical horn and a very 

 slight amount externally at the base of the posterior horns, also two 

 or three punctures along the basal bead laterad; elytra barely longer 



