18 GEO. H. HORN, M. D. 



Group D. 



Scutellum small. Anterior tibiae tridentate, serrulate or not above, 

 the anterior face smooth, the first joint of the tarsus shorter than the 

 second. Posterior tibise fimbriate at apex with equal spinules, the 

 first joint of the tarsus variable. Head distinctly tuberculate. 

 Thorax without basal marginal line. 



In this <n'oup are associated two species which seem to have but 

 little in common except the absence of basal thoracic line. 



First joiut of hind tarsus as long as the three following. Anterior tibife not ser- 

 rulate above the teeth ; color yellowish testaceous with the posterior portion 

 of the head, a large thoracic spot and the suture of the elytra brown or piee- 

 ous '. lividiis. 



First joint of hind tarsus barely as long as the next two. Anterior tibise serrate 

 above the teeth; color piceous, the margins and suture paler..vestiarius. 



A. lividus Oliv.— Oblong, convex, luteo-testaceous, the posterior portion of 

 the head and a large thoracic spot brown, elytra with the suture brown and a 

 vague cloud on the disc. Anteunse pale testaceous. Head sparsely punctate, 

 front tuberculate. Clypeus paler in color, emarginate at middle, on each side 

 rounded, .sides of clypeus slightly oblique, the gen» feebly prominent and obtuse. 

 Thorax convex, slightly narrowed in front, sides arcuate, hind angles distinct, 

 but very obtuse, basal marginal line entirely absent, disc with moderately coarse 

 puncturesvery sparsely placed, with finer punctures intermixed, less punctate in 

 male than in female. Scutellum with parallel or slightly sinuate sides, the apex 

 obtuse. Elytra parallel, humeri obtuse, disc .striate, strife finely creuately punc- 

 tate, the intervals very feebly convex with few very minute punctures. Body 

 beneath sparsely, indistinctly punctate. Mesosternum smooth in front, not cari- 

 nate between the coxfe. Hind femora smooth, stout, very sparsely minutely 

 punctate. Length .18-.20 inch: 4.5-5 mm. 



Sexual characters. — These are similar to those of granarius, the frontal tuber- 

 cles are more prominent in the male, especially the middle one, the thorax is 

 relatively larger, more convex and less punctured. The anterior tibial spur is 

 also stouter than in the female, and the U])per .spur of the middle tibia shorter. 



The coloration of this species is a little variable, especially in the 

 size of the dark discal spot of the thorax and the distinctness of the 

 elytral cloud. The head is always bicolored, the frontal suture di- 

 viding the pale clypeus from the darker portion posteriorly. 



This species is widely distributed in the eastern hemisphei-e, and 

 has been introduced in the West Indies, whence it has probably spread 

 to our Southern States, extending as far west as New Mexico. 



A. vestiariiis Horn. — Moderately elongate, convex, piceous, the entire 

 margin of head and body and the sutui-e of the elytra reddish brown, surface 

 shining. ATitennte rufo-testaceous. Head sparsely punctate, front trituberculate. 

 Clypeus subtruncate at middle, very feebly emarginate, the sides feebly arcuate, 

 genje scarcely prominent, obtuse. Thorax convex, narrower in front, sides ar- 



