106 



BRITISH ORTHOPTEKA. 



Magnitude et statnra B. americanse. Caput atrura, margine baseos 

 albo. Thorax ater, iiitens, annnlo rnagno albo. Margo tamen 

 omnis ater. Elytra ferruginea, striata, Tinea longitudinal! alba ad 

 marginem exteriorem baseos. 



(J. C. Fabricius, ' Syst. Ent.' p. 271, 1775.) 



MALE IMAGO (PL IX, fig. 2). --General colour rich 

 sienna-brown. Length some 27 mm. Head with a 

 yellow ring round the insertion of the antennas, and a 

 great part of the face yellowish-brown; antennae 

 exceeding the body in length. Pronotum with a bright, 

 distinct, yellow ring within the margin, broader pos- 

 teriorly ; disc and margin of pronotum dark. Elytra 

 with the mediastinal area yellow, reaching (as well as 



?,M_ C 



FIG. 17. Periplaneta australasix Fabricius. Dorsal and ventral aspect 



( x 1-5). c, coxae. 



the wings) beyond the tip of the abdomen. Legs (fig. 11) 

 with the femora somewhat paler, strongly spined. 

 Supra-anal plate notched. Cerci rather dark brown, 

 lanceolate, nearly straight. 



FEMALE IMAGO (fig. 17).- -Female closely resembling 

 the male ; but slightly darker, a little broader and less 

 graceful in outline, wing-tips slightly less pointed, 

 and the supra-anal plate notched and strongly arched. 



NYMPH.- -Sienna-brown, rather prettily mottled and 

 spotted with lighter brown. (A very small one, about 

 3 mm. long (which I take to be this species) has two 

 transverse whitish bands, one behind the pronotum 

 and the other across the abdomen.) 



