226 NEW AUSTRALASIAN BLATTIDAE, 



Plattzosteria cingulata^ n.sp. 



Black, banded with bright yellow, smooth, nitid. Head rufo-fuseous, ocelli- 

 form spots minute, yellow; eyes black; antennae rufo-fuscous, basal segments 

 darker. Thoracic tergites with some scattered, shallow, impressed dots, and with 

 all their visible margins broadly yellow on both dorsal and ventral aspects; the 

 black discs of these tergites with their posterior margins sinuate, that of the 

 pronotum showing anteriorly a sinuate margin, from the centre of which two 

 small dashes extend forward about 1 mm. into the yellow margin, and showing 

 posteriorly on each side of the middle line an outwardly curving, rounded black 

 process extending into the posterior yellow margin; no tegminal vestiges. Abdo- 

 minal tergites, except 8th and 9th, broadly margined yellow posteriorly and 

 laterally; postero-lateral angles of 5th, 6th and 7th tergites backwardly pro- 

 duced; posterior margin of 7th tergite subsinuate, lateral margins entire. 

 Abdominal sternites black, or dark castaneous, broadly margined yellow. Supra- 

 anal lamina of 3 subquadrate, angles rounded, emarginate, with a medial longi- 

 tudinal sulcus, posterior margin more or less spined, black, with the posterior 

 two-thirds yellow. Cerci flattened, black, tips fuscous. Supra-anal lamina of 

 2 rounded, subtectiform, posterior margin strongly denticulate, dentieulations 

 tipped fuscous. Subgenital lamina of d subquadrate, posterior margin straight; 

 styles black, situate at the angles. Legs rufo-fuscous, coxal borders on both 

 aspects broadly pale yellow; all the coxal processes yellow; posterior metatarsus 

 nearlj' as long as the remaining tarsal segments combined, its pulvillus occupying 

 almost its entire length; arolia moderate in size. Length, c? 17 mm., ? 18 mm. 



Type, specimen No. 130 {<S) ; allotype, specimen No. 131 (5), Coll. 

 Shaw. Paratypes, 4 c?, 3 ?. 



Hab.—Queensland: Spring Bluff, 1500 ft. (Miss Brigit Shaw, Jan., 1919), 

 Bunya Mts., 3300 ft. (R. Illidge, Oct., 1919), Stanthorpe district, 2700 ft. (H. 

 Jarvis, Nov., 1919). 



Notes. — This beautiful species closely resembles P. balteata Tepper, but it 

 is larger, broader, the yellow margins are relatively wider, and it is apterous 

 whilst P. balteata possesses tegminal vestiges. It appears to be widely distri- 

 buted on the Darling Downs, but has not hitherto been observed on the coastal 

 belt. 



In some specimens the supra-anal lamina of c? is furnished with several 

 stout spines, though in the Type these are merely indicated; and in one paratype 

 the lamina is spined on one side and practically entire on the other. 



The Type shows the "titillator" and several of the other chitinized portions 

 of the genital membrane protruding from the cloaca, and it may be useful to 

 draw attention to the fact that cockroaches killed by immersion in alcohol exert 

 in dying a strong expulsive effort, and the usually concealed 8th and 9th tergites 

 may become visible (vide Cutilia feriarum, infra) and a considerable part of the 

 genital membrane may be extruded. 



Platyzostebia spatiosa, n.sp. 



? Islack, nitid. Head with the vertex castaneous, the frons black, margins 

 of the clypeus and labrum yellowish-brown, the oeelliform spots large, quad- 

 rangular and yellow; the antennae as long as the body, brown, with the proximal 

 segments darker, the second segment about as long as two, and the third segment 

 about as long as four of the distal segments. Pronotum anteriorly parabolic, 

 posterior margin nearly straight, and together with the mesonotum and metano- 

 tum showing some crumplings of the surface and some impressed dots; lateral 



