176 NORTH AMERICAN BLATTIDAE 



This cosmopolitan, domiciliary pest has been spread by com- 

 merce over all but the most northern portions of the United States. 

 It has been recorded in Canada only from Toronto and Sarnia, 

 Ontario. As is the case with Blattella germanica, its greatest 

 abundance on this Continent appears to be reached in the central 

 latitudes of the United States. In infested houses about Phil- 

 adelphia it appears in swarms during the month of May, coinci- 

 dent with the arrival of the shad in the Delaware River, and in 

 consequence is locally known as the Shad Roach. 



Specimens Examined: loi; 48 males, 45 females and 8 immature individuals. 



New Haven, Connecticut, i 9 , [A. N. S. P.]. 



Camden, New Jersey, VII, 17, 1904, (G. M. Greene), i 9 , [A. N. S. P.]. 



Philadelphia, Pennsylvania, V, 4 to VI, 20, 1896 and 1914, (majority E. R. Casey), 

 7 d^, 8 9, I juv. d', I juv. 9, [A. N. S. P.]. 



Chestnut Hill, Pa., V, 3 to 10, 1914, (Hebard; in kitchen), 21 d", 23 9,1 juv. 

 d, [Hebard Cln.]. 



Harrisburg, Pa., VI, 10 to VII, 6, (at light), 5 o^, 25 9, [Pa. State Dept. Zool. 

 Cln.]; X, 14, 1916, (E. Daecke), i 9 with ootheca, [Daecke Cln.]. 



Erie, Pa., i cf, i juv. 9, [Pa. State Dept. Zool. Cln.]. 



Raleigh, North Carolina, VI, 4 to middle of VIII, (Brimley; Foster), 2 cf , 2 9, 

 [Brimley and Cornell Univ. Clns.]. 



Southern Pines, N. C, VII, 5 and 9, 1915, (A. H. Manee), 2 9 , [Hebard Cln.]. 



Johnson City, Tennessee, VIII, 27, 1903, {A. P. Morse), 3 juv. cf , [Morse Cln.]. 



Decatur, Alabama, (B. Shimek), 3 d^, [Hebard Cln.]. 



Madison, Wisconsin, VI, 16 to VII, 9, 3 d", 3 9 , [Wise. Agr. Exp. Sta. Cln.]. 



St. Anthony Park, Minnesota, IV, 2, 1896, i juv. d", [Hebard Cln.]. 



Iowa City, Iowa, IX, 24 and XI, 19, 1908 and 1915, (M. P. Somes), i d^, I 9, 

 [Somes Cln.]. 



Hamburg, la., IX, 5, 1914, (M. P. Somes), i juv. d^, [Somes Cln.]. 



Mountain Grove, Missouri, VIII, 14, 1916, (for Somes), i d', [Somes Cln.]. 



Lincoln, Nebraska, VI and VIII, {d at light), i d", i 9, [Hebard Cln.]. 



Denver, Colorado, HI, 21, (Beale), i 9, [Hebard Cln.]. 



Denton, Texas, V, 28, 1906, (F. C. Bishopp), i d, [U. S. N. M.]. 



Marathon, Tex., 3940 feet, VIII, 26, 1912, (Rehn and Hebard), i 9, [Hebard 

 Cln.]. 



Alamogordo, New Mexico, (von Krockow), 2 d, [A. M. N. H.]. 



Grand Canyon, Arizona, i d, [Bklyn. Inst.]. 



Prescott, Ariz., VII, 14, 1904, (R. E. Kunze), i d", i 9, [Hebard Cln.]. 



Nogales, Ariz., VI, 20, 1903, (E. J. Oslar), i d, [U. S. N. M.]. 



Redlands, California, I, 20, 1899, 2 d, [U. S. N. M.]. 



Los Angeles, Cal., VII, 1886, i c^, [Hebard Cln.]. 



