310 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Established Exotic Species. 
German Roach; Croton-bug; Water-bug. 
Blattella germanica (Linn6). 
Fig. 38. 
Blatta germanica Linne, Syst. Nat., ed. 12, p. 668 (1767). — Fernald, Orth. 
N. E., p. 134 (50 of sep.) (1888).— Scudder, Psyche, vol. 9, p. 100 (1900). 
— SctTDDER, Boston Journ. Nat. Hist., vol. 7, p. 418 (1862). 
Ectobia germanica Smith, Proc. Portland Soc. Nat. Hist., vol. 1, p. 144 
(1868); Rept. Ct. Bd. Agric. for 1872, pp. 378, 383 (1873). 
Phyllodromia germanica Scudder, in Hitchcock's Geol. N. H., vol. 1, p. 379 
(1874). — Beutenmuller, BuU. Amer. Mus. Nat. Hist., vol. 6, p. 258 
(1894). 
Blattella germanica Walden, Bull. Geol. Nat. Hist. Surv. Ct., no. 16, p. 56 
(1911). 
Color: light buffy brown, the female nymphs sometimes much 
darker, almost castaneous. The disk of the pronotum with a pair 
of fuscous longitudinal stripes separated by a space a little greater 
than their width. 
Measurements. 
Total length 
12-14 
Tegmina 
10-11 
Antenna 
13-15 mm. 
Male and female are of practically the same size, the female a little broader. 
The German Roach is a native of Europe, but owing to its 
predilection for the society of man as a provider of the necessities 
Fio. 38. — The German Roach, Blattella germanica. a, first stage; b, second stage; c, third 
stage; d, fourth stage; e, adult; /, adult female with egg case; g, egg case, enlarged; h, adult with 
wings spread. jl^AU natural size except g. (After Riley.) 
and luxuries of life, it has become cosmopolitan. It is our smallest 
species but makes up in numbers what it lacks in size — as is 
