306 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
and are drowned or may be taken out from time to time. In 
order correctly to associate the winged and wingless forms of a 
locality the two methods of capture (trap-lanterns and baited 
jars), should be used together. 
Only one of our native Roaches has been reported as infesting 
houses in numbers. 
Common or Northern Wood-roach. 
Parcoblatta virginica (Brunner). 
Fig. 32. 
Temnopteryx virginica Brunner, Nouv. Syst. Blatt., p. 86 (1865), 9 . 
Ischnoptera borealis Brunner, Nouv. Syst. Blatt., p. 133 (1865), cf. — 
Walden, Bull. Geol. Nat. Hist. Surv. Ct., no. 16, p. 162 (1911). 
Male: pale yellowish brown or tawny above and beneath; the 
disk of the pronotum sometimes showing a darker central spot. 
Female : legs, pronotum, and tegmina brownish yellow or tawny, 
darkest on pronotum and tegmina; abdomen brownish fuscous 
with a yellowish tinge. 
Measurements. 
Total 
Pronotum 
Tegmina 
Antenna 
Length Width 
Length Width 
Length Width 
Male. . 
. 15.5-20 6.5-7 
2.8-3.4 3.7-4.4 
13-15 4-5 
15-18 
Female . 
. 10 -12.5 5 -6 
3.2-3.5 4.2-4.5 
3.8-4.5 3-3.5 
9-10.5 mm 
This is our smallest native Roach. The males fly freely to 
light. Mr. E. J. Smith of Sherborn, Mass., captured more than 
31 
32 
Fig. 30. — Pennsylvania Wood-roach, Parcoblatta pensyhanica. Variation in size of tegmina of 
female. (After Hebard.) 
Fig. 31. — Uhler's Wood-roach, Parcoblatta uhleriana. Outline of female. (After Hebard.) 
Fig. 32. — Common Wood-roach, Parcoblatta virginica. Dorsal outline of female. (After 
Hebard.) 
Fig. 33. — Oriental Roach, Blatta orientalis. Dorsal outline of female. (After Hebard.) 
I 
