Mr. R. Shelford's Studies of the Blattidac. 271 



stigmatic dots are more prominent, the coxae are not 

 bordered with testaceous, and the size is much larger. 



Victoria, Melbourne (Geneva Mus., type), Western 

 districts (Adelaide Mus.); S. Australia, Adelaide (Oxford 

 Mus.). 



2. P. melanaria, Er. (PI. VII, figs. 3a, 35, 4.) 



Periplaneta melanaria, Erichson, Arch. Naturg., viii, 

 p. 247 (1842.) 



There has been some confusion over this and the follow- 

 ing species. I am much indebted to Dr. Th. Kuhlgatz 

 for comparing specimens with Erichson's type in the 

 Berlin Museum; the following is a description of the 

 species : — 



Piceous, nitid, impiinctate. Body depressed and rather narrow. 

 Antero-lateral margins of pronotum very slightly incrassated. 

 Antennae piceous in basal third, remainder rnlb-castaneous. Teg- 

 minal rudiments absent. Supra-anal lamina, ((J) trigonal with 

 3-4 pairs of lateral spines, apex slightly emarginate and more or 

 less rufo-fimbriate, ( 5 ) triangular, cucullate, broader at base than 

 its length, apex emarginate, the notch being rounded, margins 

 dentate. Sub-genital lamina (,^) quadrate, posteriorly widely 

 emarginate, a minute spine at the base of the genital styles which 

 are slender and acuminate. Cerci longer than the supra-anal lamina 

 in (J , of equal length in $ . Coxse bordered with testaceous. 

 Tibiae and tarsi dark castaneous or piceous. 



Length ( (J types) 25-30-5 mm., ( $ types) 28-28'5 mm. ; pro- 

 notum 7 mm. X 10 mm. 



Tasmania (Berlin Mus., types ; Oxford Mus.). 



3. P. analis, Sauss. 



Polyzosteria analis, Saussure, Rev. Zool. (2), xvi, p. 



306 (1864). 

 Polyzosteria melanaria, Brunner von Wattenwyl, Nouv. 



Syst. Blatt., p. 210 (1865). 

 Peri'planeta invisa, Walker, Cat. Blatt. Brit. Mus., 



p. 137 (1868) {$ only). 

 Peri'planeta ruficornis, Walker, Cat. Derm. Salt. Brit. 



Mus. V. Suppl. Blatt., p. 38 (1871). 



This is the mainland representative of melanaria and 

 it may be necessary eventually to merge it in that species. 



