Numbers
3 spp. (all adventive) in our area, >50 spp. total
(1)Identification
among our spp.,
B. germanica:
♂

♀
B. asahinai has a more slender body and more grey tones to its wing color. The pronotum colors more contrasting than in B. germanica, and the lateral edges of the abdomen are pale:
B. vaga, unlike B. germanica, is not afraid of light, flies readily, and has dark frons:
Print References
Roth LM. 1985. A taxonomic revision of the genus Blattella Caudell (Dictyoptera, Blattaria: Blattellidae). Entomologica Scandinavica, Supplement 22: 1–221.