1908.] NEW SPECIES OF FLEAS. 623 



7. Stephanocircus jarvist, sp. n. (Plate XXIX. fig. 12; Plate 

 XXXI. fig. 16.) 



Head. — The helmet is rounded, resembling that of S. simsoni 

 Roths. (1905), but being broader and bearing on each side 17 or 

 18 spines. The genal comb consists of 11 or 12 spines, which are 

 obtuse, like those of the helmet, not being pointed as in *S'. dasyuri 

 Skuse (1890). The occiput is shorter than in all the other species, 

 its bristles being thick. The mouth-parts are shoi't, the maxillary 

 palpus as well as the rostrum being only twice the length of the 

 spines of the genal comb. The last segment of the rostrum is 

 broader than it is long. The maxilla is pointed. 



Thorax. — The pronotum bears a comb of 30 to 40 spines and 

 two regular rows of thick bristles. The mesonotum has about 

 7 rows of bristles, the anterior bristles being small. On the pleura 

 of the mesothorax there are about 24 bristles, some being short. 

 The metanotum has three rows of l^ristles and in front of them a 

 few additional shorter hairs. The episternum of the metathorax 

 bears about 6 bristles, while the epimerum has two rows, the first 

 being irregular and containing 6 or 7 bristles and the second 

 containing 5. 



Abdomen. — The abdominal tergites 1 to 7 bear each two rows 

 of bristles, the seventh tergite having 2 apical bristles in the 

 male, and 4 of neai-ly equal size in the female. On the first 

 tergite there is a comb of 27 spines in the S ■, which are only a 

 little shorter than those of the pronotal comb, the comb of the $ 

 containing 34 spines ; the second tergite has a comb of 17 shorter 

 spines in the c? and of 22 in the $ , the comb of the third tergite 

 ■consisting of 15 spines in both sexes. The fourth tergite bears 

 ■on each side 2 or 3 shorter and paler apical spines and the fifth 

 and sixth tergite one spine. 



Legs. — Resembling most those of /S. mars. The hind coxa is 

 longer than in that species. The hind femur bears posteriorly 3 

 subventral bristles and between these and the dorsal edge several 

 more bristles, there being also one or two bristles near the base 

 on the outer surface. The tibiae are very characteristic. In the 

 fore and mid tibise the outer bristles of the dorsal pairs are shifted 

 towards the lateral surface, forming a close-set row of thick and 

 equal-sized bi-istles. In the hind tibia these bristles are in their 

 normal position close to the long dorsal bristles. The dorsal 

 bristles are very long, the fifth being of the length of the tibia. 

 The hind tibia bears niimerous bristles scattered over the outer 

 surface. The first mid-tarsal segment is twice the length of the 

 second. The first hind-tarsal segment is only one-sixth shorter 

 than the hind tibia, its longest apical bristle nearly reaching to 

 the tip of the second segment, which latter is twice the length of 

 the fifth segment (claws excluded). 



Modified segments.— S • The clasper (PI. XXIX. fig. 12, 01.) is 

 produced into a broad, leaf-shaped apical lobe, which bears three 

 large bristles placed on the lateral surface. A number of small 



Prog. Zool. Soc— 1908, No. XL. 40 



