68 THE BLATTIDAE OF PANAMA 



exposed when at rest are translucent prout's brown in a broad transverse band, 

 beyond this the tips are transparent, very faintly tinged with brown; portion of 

 dextral tegmen concealed when at rest, faintly tinged with brown, the transverse 

 dark band there fading out rapidly. Wings transparent, faintly tinged with brown, 

 except in area of enlarged portions of costal veins which is prout's brown, this area, 

 when tegmina and wings are at rest, lying beneath the dark transverse tegminal 

 band. Dorsal surface of abdomen buffy, supra-anal plate with all borders washed 

 with prout's brown. Cerci buffy, except first and last joints, which are prout's 

 brown. 



Length of body, 9.5; length of pronotum, 2.8; width of pronotum, 3.8; length of 

 tegmen, 12. i ; width of tegmen, 3.75; length of caudal femur, 4.45; length of caudal 

 tibia, 5.7; length of caudal tarsal joints, 3.3; length of cercus, 3.1 mm. 



In the immature condition the coloration is very similar, except that the dorsal 

 surface of the abdomen is prout's brown laterad in the distal half, this increasing to 

 the supra-anal plate and cerci which are entirely of that color. 



In addition to the type we have two immature examples, taken 

 by A. H. Jennings on the upper Rio Pequeni, Chagres Basin, 

 Panama. 



Blattella germanica (Linnaeus) (Plate V, figure 16.) 



1767. [Blatta] germanica Linnaeus, Syst. Nat., ed. XH, p. 668. [Denmark.] 



Gatun, Canal Zone, Panama, VIII, 6 to 22, 1916, (Harrower),i 9 ; (Jennings), 

 Id". 



Tabernilla, C. Z., Pan., V, 9, 1907, (Busck), i 9. 



Ancon, C. Z., Pan., I, 12, 191 1, (Busck), i 9 ; (Jennings), i 9. 



Ischnoptera nox new species (Plate IV, figure 7.) 



The present species shows a somewhat intermediate condition 

 between the known forms of the Morio and Rufa Groups. The 

 black coloration suggests the known species of the former, while 

 the subchitinous area of the male supra-anal plate is more extensive 

 than in any of the known species of the Rufa Group, though by 

 no means as large or as highly developed as in the known species 

 of the Morio Group. 



From the sum of the characters observed we place nox in the 

 Rufa Group, after vulpina Hebard and before rufa rufa (De Geer). 

 The tegmina and wings are somewhat more elongate than in rufa 

 rufa, much as are frequently found in rufa occidentalis Saussure, 

 but proportionately not as elongate as in vulpina. The distinctive 

 male supra-anal plate is clearly a further development of the type 

 found in rufa rufa, the subgenital plate in this sex closely resembles 



