New species of Pterostichus subgenus Circinatus (Coleoptera: Carabidae: Pterostichini) from Vietnam

Acronyms used are as follows: SIEE — the author’s reference collection at A.N. Severtsov Institute of Ecology & Evolution, Russian Academy of Sciences, Moscow; ZMMU — Zoological Museum of the Moscow State University. The following parameters were analyzed: maximum body length measured between apices of closed mandibles and apex of elytra (BL); length of elytron, measured from the highest point of basal ridge to apex (EL); maximum width of elytra (EW); width of head across eyes (HW); width of pronotum between apical (PA) or basal (PB) angles; length of pronotum along median line (PL); maximum width of pronotum (PW). Measurements were taken using an eyepiece micrometer, to two decimal places. The number of specimens measured (n) is only given for the first ratio in the description. All labels are printed. Data on labels of type specimens are in quotes.