42 Journal New York Entomological Society. fVoi. iv. 
smooth. Elytra at base very slightly wider than the thorax, striae mod¬ 
erately deep, finely crenately punctured, intervals convex. Beneath 
paler, sides of metasternum and the met-epimera with coarse punctures. 
Ventral segments coarsely sparsely punctate at sides of the first four. 
Legs pale rufo-testaceous. Length 6-7 mm. = .24-. 28 in. 
Habitat: Middle States region to Texas and Colorado. 
A. musculus Say .—Oblong oval, rufo-piceous or piceous, shin¬ 
ing, sometimes faintly aeneous. Antennae pale. Thorax rather more 
than half wider than long, distinctly narrowed anteriorly, sides arcuate, 
hind angles usually obtuse, sometimes nearly rectangular, basal impres¬ 
sions almost obliterated, surface near hind angles sparsely indistinctly 
punctured or entirely smooth. Elytra at base not wider than the tho¬ 
rax, striae moderately deep, finely crenately punctured, intervals slightly 
convex. Beneath of nearly same color as above, abdomen usually paler, 
first ventral segment with a few punctures at sides. Legs rufo-testa- 
ceous. Length 5-5.5 mm. = .20-.22 in. 
Habitat: Pennsylvania, Ohio, Illinois, District of Columbia, 
North Carolina, Wisconsin, Nebraska, Arizona. 
Loxandrus Lee. 
Differs from Pterostichus and allied genera by the anterior tarsi 
being obliquely dilated in the males. The species included are usually 
black, shining, iridescent beetles, rarely with any color-markings be¬ 
yond the tendency to piceous or yellow shades of the appendages. They 
occur chiefly in the Southern States, and are difficult of separation be¬ 
sides being quite rare in collections. A tabular arrangement of the 
characters regarded as of specific value by previous writers will allow us 
to separate them as follows: the species from the region under consid¬ 
eration all belonging to Dr. LeConte’s division in which the side margin 
of the prothorax is not explanate posteriorly, and the hind angles 
rounded or rarely rectangular. 
Synopsis of Species. 
Elytra with a post-median ferruginous spot. celer. 
Elytra immaculate. 
Smaller (.20-.18 in.). Color of legs variable, hind angles of prothorax 
with the tip rounded. agilis. 
Larger (.38-.40 in.). 
Hind angles of prothorax rounded at tip. minor. 
Hind angles of prothorax rectangular. erraticus. 
L. celer Dej. —Black, moderately brilliant, antennae and legs 
