MORSE: ORTHOPTERA OF NEW ENGLAND. 313 
gin fuscous, and usually a castaneous or fuscous bilobed spot in 
the center, but sometimes nearly solid-colored in the female. 
Measurements. 
Total 
Tegmina 
Pronotum 
Length Width 
Hind tibia 
Antenna 
Male 
. 34-37 
28-32 
8-10 9.5-10.5 
11-13 
40-57 
Female. . . 
. 30-33 
25-26 
8- 9 10 -11.5 
12-12.5 
35-38 mm 
This is our largest common Roach and it finds a congenial 
abiding-place wherever organic debris accumulates in quantity 
accompanied by heat and moisture. Consequently it sometimes 
exists in enormous numbers in slaughter-houses, sugar-refineries, 
breweries, and restaurants of the lower class, where it is frequently 
Fig. 39. — The American Roach, Periplaneta americana. a, view from above; 6, from beneath. 
Both enlarged one-third. (After Marlatt.) 
associated with the Oriental Roach and the German Roach or 
Croton-bug. In such places it hides in cracks and dark filthy 
corners, in closets and under floors, often gathering in large 
groups, surrounded at times by the new-born young and the 
