Comparison of adult field cockroach, Blattella vaga (top), and adult German cockroach, Blattella germanica (below). The black stripe between the eyes (see arrow) distinguishes the field cockroach from the German cockroach.

Field cockroaches can be distinguished from their indoor relatives, German cockroaches, by an olive coloration and a black stripe between the eyes on the front of the head.; Riverside County, CA Credit: Dong-Hwan Choe, UC Riverside — Comparison of adult field cockroach, Blattella vaga (top), and adult German cockroach, Blattella germanica (below). The black stripe between the eyes (see arrow) distinguishes the field cockroach from the German cockroach. Credit: Dong-Hwan Choe, UC Riverside