c. 



cc. 



SUBFAMILY IV. BLATTIN^E. 



Tegmina without basal sub-marginal yellow stripe; thorax yel- 

 low, more or less tinged with brown (Fig. 32, F.) 32. BRUNNEA. 



oa. 



Tegmina with a yellow sub-marginal stripe along basal third; 

 pronotum yellow, with base and one or two large discal spots 

 black (Fig. 48.) 33. AUSTRALASIA. 



Color a uniform shining blackish-brown. 34. FULIGINOSA. 



31. PERIPLANETA AMERICANA (Linnaeus), 1758, 424. American Roach. 



Male Head chestnut-brown; tegmina shining reddish-brown; prono- 

 tum broadly margined on sides and base, and narrowly in front with yel- 

 low, this enclosing a large, bilobed brown spot which is usually sharply 

 defined, though sometimes much suffused; legs and under surface pale 

 brownish-yellow, middle of abdomen darker. Pronotum sub-elliptical, 

 widest at middle, narrowed in front, its angles all broadly rounded; discal 

 oblique impressions broad, feeble. Supra-anal plate of male with apical 

 half membranous, otherwise as described in key. Cerci 15-jointed, very 

 long (6 7 mm.) and strongly tapering. Female Stouter, head and pro- 

 notum broader, the latter with discal impressions less obvious; tegmina 



Fig. 47. Pcriplaiicta aincricana (Linn.); a, view from above: b, from beneath; both 

 enlarged one-third. (After Howard & Marlatt.) 



and wings shorter. Supra-anal plate weakly keeled above, not membran- 

 ous. Subgenital plate as in other Blattinse. Ootheca 5.2x7.8 mm., its 

 sutural ridge narrow, with a row of circular discs. Length of body. $ , 

 29.734.2, $, 27.834; of pronotum, $ and $, 7.G 9.G; of tegmina, $, 

 29.635.6, 5, 23.928.4 mm. Width of pronotum, $, 9.1 11.3, $, 9.7 

 11.8; of tegmina, $, 9.411.1, $, 8.310.6 mm (Fig. 47.) 



