42 Journal New York Entomological Society. [Voi. iv. 



smooth. Elytra at base very slightly v/ider than the thorax, stride 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 mually paler, 

 first ventral segment with a few punctures at sides. Legs rufo-testa- 

 ceous. Length 5-55 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 



