8 ARKIV FÖR ZOOLOGI. BAND 10. N:0 3. 



the bristles being placed in oblique rows, and those situ- 

 ated at the dorsal and apical edges of the tibiae not forming 

 a regular comb. 



Modified segments. J*. The clasping organs (textfig. 5) 

 differ from those of S. simsoni in the manubrium being 

 narrower and less curved, the process P of the clasper more 

 pointed, the movable process F slenderer, the bristles placed 

 in and near the centre of the ninth sternite (IX. st.) larger, 

 and the stout subapial bristle of this boomerang-shaped 

 sternite being much longer than in simsoni. The tenth (anal) 

 tergite has on both sides together three rows of three slend- 

 er bristles, one row being dorsal and median, and one plac- 

 ed on each side, the last bristle of each row being apical; 

 the anal sternite bears on each side two long apical bristles 

 and no others. The apical hook of the ejaculatory duct is 

 as strongly curved as in simsoni but somewhat broader, 

 while the large dorsal end-piece of the paramere (Par) is 

 much slenderer than in simsoni. 



One c?. Höst N:o 18 = Epimys sp. (Mus. Stockholm). 

 We now know five species of Stephanocircus, all from 

 Australia. A sixth species (thomasi) has been separated 

 generically in 1911 as Stephanopsylla, and the American fJeas 

 originally placed in Stephanocircus are now placed under 

 Craneopsylla Roths. (1911). 



We tabulate the species of Stephanocircus as follows: ~ 



A. Pronotum with three rows of bristles; outer dorsal 



and apical bristles of all the tibiae forming a continuous 



comb. S. pectinipes Roths. (1915), from Emerald, Victoria; 



höst Epimys assimilis. 



B. Pronotum with two rows of bristles; outer dorsal and 

 apical bristles of the före and mid tibiae only forming a 

 regular comb; abdomen with a comb of long black spines 

 on first three segments. S. jarvisi Roths. (1908), from Eme- 

 rald, Victoria; höst Fhascologale sivainsoni. 



C. Pronotum with 2 rows of bristles; the outer dor- 

 sal and apical bristles not forming a regular comb; abdo- 

 minal segments with only a small number of short apical 

 spines. 



a. Anterior edge of helmet rounded. 

 a^ Occiput thrice as long as the helmet (plus comb) 

 is wide, measured from the apex of the fourth spine; anal 



