54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io8 



tures of C. a. affinis see Darskaya (1950) and Smit (1956). The 

 polytypic species C. affinis appears to be related to Ceratophyllus idius 

 Jordan and Rothschild and, more distantly, to C. niger C. Fox. 



Description: Head with a moderately developed frontal tubercle; 

 preantennal region with a frontal row of six or seven setae in the male, 

 in the female the frontal row is vestigial and consists of only a few 

 minute setae; ocular row with three setae in both sexes; postantennal 

 region of head with three or four setae above the antennal fossa and a 

 posterior row of five or six setae each side. The long setae of the 

 antennal pedicel reach to about the seventh segment of the club in 

 the male, and well beyond the apex of the club in the female. Labial 

 palp not quite reaching the apex of the fore coxa. 



Pronotum with a ctenidium of 31-33 spines, the most dorsal of 

 which are about as long as the pronotum anterior to the upper spines 

 (as in C. idius; in C. niger the pronotum is dorsally much longer than 

 the pronotal spines). Mesepimeron with one or two setae on the 

 middle of the surface though fairly close to the mesopleural rod, apart 

 from the few ventral and posterior setae (these median setae are 

 usually also present in C. idius, but absent in C. niger). Pleural arch 

 of metathorax well developed ; squamulum of metasternum short and 

 broad. Fifth tarsal segment of all legs with numerous minute setae 

 scattered over the plantar surface. 



Terga i-v in the male with the following numbers of marginal 

 spinelets per side: 2, 3 (4), 2 or 3, 2, 1 (2); in the female: 2 or 3, 

 3 or 4, 2 (3), 1 or 2, and respectively. Spiracular fossae of terga 

 ii-vii usually with large postspiracular areas, the largest for any 

 species in the genus (figs. 1, 2; cf. figs. 3, 4), although there is 

 considerable variation in the size of these areas on individual segments. 



In other respects the structure and chaetotaxy of the head, thorax, 

 legs, and unmodified abdominal segments are as in related species. 



Male (figs. 5-8): Tergum viii (fig. 7) with a wealdy developed 

 and rather narrow spiculose area, a row of 9-13 strong setae along the 

 dorsal margin and two or three setae on the lateral surface. Sternum 

 viii (fig. 5) long and narrow, distinctly curved upwards, with a 

 triangular basal portion, two slender apical setae, and a long and nar- 

 row apical membranous process which bears a posteriorly directed, 

 rather narrow, spiculose basal lobe, as in the nominate subspecies. 

 Manubrimn of clasper fairly broad basally; fixed process almost quad- 

 rangular, with a broadly rounded apex; the two acetabular setae are 

 situated not far below the middle of the posterior margin of the 

 clasper (fig. 5). Movable process (figs. 5, 8) elongate, its smoothly 

 convex posterior margin bearing several slender setae along the upper 

 half, while the anterior margin is angulate at about the middle. 

 Apical lobe of the distal arm of sternum ix (fig. 5) narrowing very 



