SOME NEW CHINESE FLEAS. 369 



Legs. — The hind margin of tlie hind coxa of the c? is incurved 

 from one-fourth of the margin to its centre. The mid- and 

 hind femora bear on the inside one lateral bristle, placed at the 

 basal third, and on both sides one subapical ventral bristle. Tlie 

 hind tibia has a double row of 13 to 16 bristles on the outer 

 surface and a single row of 5 to 7 on the inside. The outer 

 dorsal biistles, 18 in number inclusive of the apical one, are stout, 

 most of them being less pointed than usually and nearly all being 

 of more or less the same length. The longer bristles have like- 

 wise blunt tips. The longest apical one hardly reaches to the sub- 

 apical notch of the first hind-tarsal segment. The first segment 

 of the mid-tarsus is distinctly shorter than the second. The 

 fourth segment of the fore- and mid-tarsi is only as long as it is 

 broad, that segment of the hind tarsus being one-tenth longer than 

 broad in the $ and about one-fifth in the J • The fifth segment 

 bears in all the tarsi five pairs of lateral bristles. The hind tarsus of 

 the S is remarkable for the peculiar development of the bristles. 

 The bristles on the upper surface and at the hind edge of these 

 segments are thin and those placed in the notches of the hind edge 

 and at the apex are long, the longest bristles, moreover, being wav3^ 

 There are eight bristles each dorsally at the apex of the second 

 and third segments. These bristles radiate in fan-shape, the one 

 placed at the anterior apical corner deviating but little from the 

 general direction of the tarsus and being the shortest of the row, 

 the others gradually increasing in length as one proceeds from 

 the anterior to the posterior side of the segment, the longest 

 about equalling segments 3, 4, and 5 together. The bristles on the 

 tarsi of the $ are all short, the apical ones of the second hind- 

 taisal segment not reaching even to the apex of the third segment. 

 The proportional lengths of the segments are as follows : — 



Mid tarsus: c^ . 18, 20, 11, 7, 19 ; $.17,20,11,7, 19. 

 Hind tarsus: c? • 50, 39, 14, 9, 21 ; $ . 47, 38, 16, 10, 22. 



Modified segments. — c5 . The eighth tergite bears about 20 

 bristles in the upper half of the apical lobe and none in the lower 

 half. The eighth sternite (text-fig. 107, VIII. st.) is narrow and 

 curved, and bears ventrally two bristles. Its distal portion is 

 membranaceous and divided into a large fringed flap and several 

 long filaments as indicated in the figure. The clasper (text-fig. 

 107, 01) is small and is produced into a vertical, slightly club-shaped 

 process (P), wdiich bears two small hairs. The movable process 

 (F), on the other hand, is very large and presents two remarkable 

 structui'es. The upper edge, is, as far as we can make out, 

 widened into a membranous appendage which projects distally 

 and does not bear any hairs. The other peculiarity is the 

 presence of a row of short spine-like bristles on the outer surface 

 of the " finger." The ninth sternite (text-fig. 107, IX. st.) has a 

 broad, curved vertical arm and a long and relatively narrow 

 horizontal arm, both being of a characteristic shape. The distal 

 portion of the horizontal arm narrows almost to a point. — 



