A key to species of the genus Pterostichus (Carabidae) from Sakhalin Island

1  Metatrochanter without a seta ..................................................
  - Metatrochanter with 1 seta .. (See Fig. 1) ..................................

2  Mesofemur with 5-7 setae along hind margin .........................
  - Mesofemur with 2 (rarely 3) setae along hind margin ...........

3  Metepisternum short .................................................................
  - Metepisternum elongated .........................................................

4  Sides of pronotum deeply sinuate ...........................................
  - Sides of pronotum without sinuation .......................................

5  Metacoxa with 2 setae ...............................................................
  - Metacoxa with 3 (rarely 4-5) setae ...........................................

6  Metepisternum short ..................................................................
  - Metepisternum elongated .........................................................

7  Elytral sculpture irregular .........................................................
  - Elytral sculpture regular ...........................................................

8  Elytra with metallic iridescense ................................................
  - Elytra black, without iridescense ..............................................

9  Elytra without scutellar pore .....................................................
  - Elytra with scutellar pore ...........................................................

10 Smaller, less than 6,5 mm. Eyes normal ..................................
  - Larger, greater than 6,5 mm. Eyes flat .....................................

11 Pronotum without latero-basal carina .....................................
  - Pronotum with latero-basal carina ............................................

12 Dorsal pores nearer to third stria of elytra .............................
  - Dorsal pores nearer to second stria ........................................

13 Last tarsal segment setose underneath .................................
  - Last tarsal segment glabrous underneath ..............................

2
5

P. leptis
3

P. sachalinensis
4

P. subovatus
P. abasarukini

6
P. kurosawai

7
9

P. wellschmiedi
8

P. alacer
P. abudarini

10
11

P. diligens
P. morawitzianus

12
P. nigrita

13
P. microcephalus

P. haptoderoides
P. laticollis