422 PROCEEDINGS OF THE ACADEMY OF [April, 



Remarks. — Mr. A. N. Caudell has compared one of the female 

 specimens before me with Scudder's type and his notes show them to 

 be the same. The correlation of the sexes is made with a considerable 

 degree of certainty, chiefly, however, on account of the absence of any 

 other species of native roach belonging to this subfamily in a good 

 portion of the territory over which this species is distributed. From 

 the material in hand the species appears to decrease in size southward, 

 as a male from Lower California is considerably smaller than individuals 

 of the same sex from the Los Angeles region and much inferior in size 

 to Ormsby County, Nevada, and one of two Oregon specimens. This, 

 however, may not be more than individual variation, as the other 

 Oregon male has the tegmina but little longer than the Lower Cali- 

 fornia specimen, although the pronotum is very appreciably larger. 

 Specimens examined. — Thirteen; ten males, three females: 

 Oregon. Two males. (Bruner Collection.) 

 Ormsby County, New One male. (Morse Collection.) 

 Bair's Ranch, Redwood Creek, Humboldt County, Cal. One female. 

 (U. S. X. M.) 

 San Jose, Cal. One male. (U. S. N. M.) 

 Los Angeles, Cal. One male. (U. S. N. M.) 

 Los Angeles County, Cal. One male. (U. S. N. M.) 

 Pasadena, Cal. One male. (A. N. S. P.) 

 California. Two males, two females. (U. S. N. M.) 

 Lower California. One male. (Bruner Collection.) 



Ischnoptera pensylvanica (De Geer). 



1773. Blatta pensylvanica De Geer, Mem. l'Hist. Ins., Ill, p. 537, pi. 14, 



fig. 4. [Penns} r lvania.] 

 1835. Blatta pensylvanica Harris, in Hitchcock, Rep. Geol. Mass., 2d ed., 



p. 576. [Massachusetts.] 

 1862. Bl[atta] borealis Saussure, Revue et Magasin de Zoologie, 2e Scr., 



XIV, p. 166. [North America.] 

 1862. I[schnoptera] nortoniana Saussure, ibid., p. 169. [North America.] 

 1862. Platamodes pennsylvanica Scudder, Boston Journ. Nat. Hist., VII. 



p. 417. (Part.) [Indiana; Maryland.] 

 1862. Ectobia flavocincta Scudder, ibid., p., 419. (Part.) [Massachusetts; 



western States; Lake Superior.] 

 1864. Ischnoptera translucida Saussure, Mem. l'Hist. Nat. Mex., Ill, p. 85. 



[North America.] 



1864. Blatta borealis Saussure, ibid., p. 96, pi. 1, fig. 13. [North America.] 



1865. Ph[yllodromia] borealis Brunner, Nouv. Syst. Blatt., p. 101. [North 

 America.] 



1865. I[schnoptera] pensylvanica Brunner, ibid., p. 135. (Part.) [Col- 

 ombia; North America; Indiana; Maryland.] 



1868. Ischnoptera pennsylvanica Walker, Catal. Blatt. Brit. Mus., p. 113. 

 [Canada; North America.] 



1870. Blatta (Phyllodromia) borealis Saussure, Miss. Scient. Mex., Rech. 

 Zool., VI, p. 42. [North America.] 



1870. Ischnoptera pennsylvanica Saussure, ibid., p. 63, pi. II, fig. 35. [North 

 America.] 



