[ 58 ] 
Length less than one tenth of an inch. 
Resembles the preceding, but may be distinguished by 
the double thoracic groove, forming an inclined carina. 
9. A. Simplicicollis, Blackish; antennae, feet, inner tip 
of the elytra and posterior margins of the segments of the 
tergiim reddish-brown. 
Inhab. Missouri. 
Body with short prostrate hairs: black: (mtennae 
reddish-bTQwn, transverse joints somewhat darker: elytra 
on the sutaral margin, particularly towards the tip, ol)s- 
cure reddish-brown; common emargination at tip very ob - 
vious: ter gum with, the posterior margins of the segments 
dull reddish feet redish-browm or honey yellows 
Length about one tenth of an inch. 
Distinguished from the two preceding species by tlie 
simplicity of the thorax and the margined segments of 
the tergum. 
10. A. fahificcL Black; with converging hairs; elytra 
and fee t|yello wish. 
In had. Indiana. 
Body black, with rather long, prostrate hairs: head with 
the hairs converging to the inicidle line and directed for- 
ward: blackish, basal joints obscure piceous: 
pi dull yellowish: thorax with the hairs converging o 
the middie line and directed forwards: elytra duli yn- 
lowish, darker on the base, suture and outer margin, tlui 
hairs somewhat arranged so as to resemble striae: feet hon- 
ey yellow 
Length about one tenth of an inch. 
11. A. Black, distinctly punctured; inner tip of 
the elytra dull yellowish. 
Inhab. Missouri. 
JSorfj/ with scattered hairs: head polished, with sparse 
irregnlarlj^ arranged, rather large punctures: antennae ( i 
the basal joints hardly tinged with piceous: thorax pol- 
ished, with numerous, rather large, unequal, and irregr 
larly scattered punctures; rnidle line destitute of punc- 
tures : fed bkck-piceous. 
