86 FAMILY II. - BLATTID.E. - THE COCKROACHES. 



of subgenital plate, its apex obtusely pointed. Length of body, $ , 13 16, 

 9, 11.514.5; of pronotum, $, 3.13.7, 9, 3.73.9; of tegmina, $, 13.- 

 916.1, $ 6.97.7 mm. Width of pronotum, $, 3.94.7, 9, 4.85.2; of 

 tegmina, $, 4.35.4, 9, 3.63.8 mm. (Fig. 39, D.) 



Knox Co., Ind., June 8 9, one male, two females, taken from 

 beneath a log in a cypress swamp (W. S'. B.}. Known elsewhere 

 only from Havana and Pulaski, 111., Rives, Tenn., Lakeview and 

 Hattiesburg, Miss., West Monroe and Mansura, La., and Dallas 

 and Victoria, Texas; May Sept. Of the 12 specimens known to 

 Hebard one was taken in a cavity of a dead sweet gum, two be- 

 neath a sign on pine tree and one at light. 



25. PARCOBLATTA PENNSYLVANIA (DeGeer), 1773, 537. Pennsylvania 

 Wood-Roach. 



Male Large for the genus, moderately broad. Head chestnut-brown, 

 sides of face pale; pronotum with hind margin and disc dark brown, sides 

 yellowish transparent, as are also the margins of tegmina for three-fourths 

 their length; disc of tegmina reddish-brown; abdomen and cerci chest- 

 nut-brown; legs yellow, the tibipe and tarsi often pale brown. Interocu- 

 lar space flattened, finely rugose, its width one-third less than that be- 

 tween antennal sockets. Pronotum sub-elliptical, widest slightly behind 

 middle, hind margin feebly rounded, oblique impressions distinct. Supra- 

 anal plate concave, its apical half often deflexed. Subgenital plate one 

 half wider than long, convex except near apex where it is narrowed and 

 often concave near the styles. Left style slightly stouter and more de- 

 flexed than right one. Female Large, robust. Color of $ , the disc of tho- 

 rax often paler; dorsal surface of abdomen dark chestnut-brown, its edges 

 paler; middle of abdomen beneath pale. Head larger than in $, the in- 

 terocular space equal to that between antennal sockets. Pronotum widest 

 near base, hind angles more sharply rounded than in male. Tegmina var- 

 iable in length, usually covering two-thirds or more of abdomen, their 

 tips broadly rounded. Supra-anal plate triangular, feebly concave each 

 side near base, its apex usually sharply rounded. Subgenital plate 

 strongly convex, twice as wide as long, broadly rounded at tip. Length 

 of body, $, 16.824.5, 9, 12.718; of pronotum, $, 4.2 5.3, 9, 4.3 5.8; 

 of tegmina, $ , 17.3 25.1, 9 , 6.4 13.9 mm. Width of pronotum, $ , 5.4- 

 6.9; 9, 5.17-2; of tegmina, $, 5.47.7, 9, 4.25.7 mm. (Figs. 41, 42.) 



In Indiana the Pennsylvania wood-roach is the most common 

 of our native species, having been taken in the State wherever 

 collections have been made, beneath the loose bark of logs and old 

 stumps. It is usually seen in the wingless stages, the mature in- 

 dividuals being common only from May 15th to October. The 

 half grown young are of a shining, dark brown color, the dorsal 

 surface of thoracic segments often paler. As the long-winged 

 males are attracted by light, country houses are often badly 



