1931 ] Carabidse from North Carolina and Tennessee 157 
Pterostichus, subgenus or section Monoferonia Csy. 
Casey 1918, p. 363 
Excellent series, including all previously described and 
several new forms in this subgenus, are before me, so that 
it seems desirable to publish a complete review of the 
species. The treatment of Monoferonia as a group of full 
generic rank seems to me to be unjustified. I prefer 
to treat it merely as a natural subgenus or section of Ptero- 
stichus, as is done in the Junk Catalogue (Csiki 1930, p. 
674). Among the other Pterostichini, Monoferonia may 
be characterized as follows: 
Body slender, convex, black or piceous, very highly 
shining; mentum tooth deeply emarginate at apex; two 
bristles over each eye; prothorax never much constricted 
at base, the basal angles obtuse, often rounded at apex; 
inner basal stria of pronotum deep and linear, outer 
shorter, often deeply obliterated ; elytral striation complete 
except that the scutellar stria is nearly or quite obsolete; 
a single dorsal puncture on inner edge of third elytral inter- 
val behind the middle (two punctures on one or both sides 
in rare individuals) ; inner wings atrophied; met-epister- 
num short; sides of body below with or without (variation 
largely individual) scattered, shallow punctures; anterior 
tarsi of $ dilated, joints not oblique ; $ palpi slender; last 
ventral abdominal segment of $ modified. 
The species are difficult, but I think may be distinguished 
by the following table : 
1. Elytral striae shallow, distinctly punctuate near 
base, intervals perfectly flat near apex; last ven- 
tral of $ only slightly modified 1. primus n. sp. 
Elytral striae more impressed, not distinctly punc- 
tulate, intervals distinctly convex even at apex 
(less so in typical mancus , in which, however, the 
$ last ventral is characteristically modified — see 
description below) 2 
2. Outer basal fovea of pronotum nearly or quite ob- 
solete, basal angles rounded at apex; last ventral 
