230 GEO. H. HORN, M. D. 



convex with scarcely a trace of the anterior sinuous line, surface smooth, a few- 

 scattered punctures at the margin only, color orange-red, the flat margin black. 

 Scutellum i3at. Elytra as wide as the thorax, about one-half longer than wide, 

 sides slightly arcuate, broadest a little behind the middle, then a little narrower 

 to apex which is sinuately truncate, lateral margin acute, moderately promi- 

 nent, epipleural fold wide, disc broadly transversely impressed behind the 

 scutellum, then a little more convex and slightly declivous to apex, surface 

 sparsely indistinctly punctate: color black, epipleural fold entirely red, a post- 

 humeral broad red fascia interrupted at the suture and an apical fascia con- 

 sisting on each elytron of three confluent spots. Abdomen above sparsely 

 punctate, moderately shining. Body beneath black, shining, metasternum 

 with short yellowish hairs. The middle and posterior tibife are gradually 

 dilated to tip and slightly arcuate. The spurs of the anterior tibia are nearly 

 equal, the outer apical angle is however prolonged. Length 1.08 — 1.40 inch ; 

 27 — 35 mm. 



The males have the anterior tarsi broadly dilated and the pos- 

 terior femora stout. The posterior trochanters are spiniform in both 

 sexes. 



The color of the head and thorax serve to distinguish this species. 

 By the form of its thorax it is allied to Sayi and orhicoIUs. The 

 elytral markings are nearly constant, showing but little variation. 



Widely distributed in the Atlantic region from the Middle States 

 to Texas. 



N. orbicollis Say. — Form moderately robust, black, shining, elytra with 

 two incomi^Iete fascise and short erect hairs. Head smooth, shining, sparsely 

 finely punctate, lateral impressions moderately deep, rhinarium orange-red. 

 Antennse piceous, club orange-red with the first joint black. Thorax orbicular, 

 wider than long, apex truncate, sides and base nearly equally widely margined, 

 disc convex, median line and anterior sinuous impression moderately deep, the 

 flattened margin coarsely punctate and with a few erect hairs, the disc sparsely 

 minutely punctulate. Scutellum flat, moderately densely punctured. Elytra 

 not wider at base than the thorax, sides arcuate and gradually broader behind 

 the middle then slightly narrowed to apex which is sinuately truncate, disc 

 with vague transverse depression behind the scutellum then the surface is 

 slightly more convex and declivous to tip, surface shining, sparsely punctate 

 and with two vague costse and with erect brownish hairs arising from each 

 puncture; marginal line moderately prominent, epijileural fold moderately 

 wide; color of elytra piceous black, with the post-humeral fascia broadly 

 interrupted by the suture and a subapical transversely oval spot orange-red, 

 epipleural fold piceous or black. Abdomen above sparsely punctate. Body 

 beneath sparsely punctate, metasternum with brownish yellow hairs. Middle 

 and posterior tibise in both sexes gradually broader to tip and straight. 

 Anterior tibiae with equal spurs, the outer apical angle slightly prolonged. 

 Length .80—1.00 inch; 20—25 mm. 



The anterior tarsi of the male are rather broadly dilated. The 

 hind trochanters are prolonged in both sexes. The posterior tibiae 

 are much stouter in the male. 



