310 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Established Exotic Species. 
German Roach; Croton-bug; Water-bug. 
Blattella germanica (Lirm6). 
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). 
— Scudder, Boston Joum. Nat. Hist., vol. 7, p. 418 (1862). 
Edobia 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). — Beutenmdller, Bull. 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 
Fig. 38. — The German Roach, Blattella germanica. a, first stage; 6, second stage; c, third 
stage; d, fourth stage; e, adult;/, adult female with egg case; g, egg case, enlarged; h, adult with 
wings spread. All 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 
