254 Part III. — Twelfth Annual Report 



Leptopsyllus typicus, sp. n. (PI. IX. figs. 2-11.) 



Description. — Female. Length, -74 mm. (^Vth of an inch). Anterior 

 antennae eight-jointed, short and robust ; the fifth, sixth, and seventh 

 joints are shorter than any of the others. The formula shows the pro- 

 portional lengths of the joints : — 



13 • 10 • 6 • 3 • 2 • 2 • 2 • 5 • 

 1 • 2 • 3 • 4 • 5 • 6 ' 7 • 8 • 



Posterior antennae composed of three moderately long joints ; and the 

 small one-jointed secondary branch springs from near the end of the first 

 joint (fig. 4). The two-jointed branch of the mandible-palp has the first 

 joint elongate, and furnished with a marginal second joint, very short, and 

 provided with three terminal hairs (fig. 5). Maxillae as in Cylindropsyllus. 

 Anterior foot-jaws stout, two (or three) jointed, furnished with three 

 marginal processes, each with two small spinulose terminal setae ; the 

 distal end of the second joint is produced, and supports a stout curved 

 spine. In a notch near the distal end of the second joint there is what 

 looks like a rudimentary third joint, from which spring three small setae 

 (fig. 6). Posterior foot-jaws slender, three-jointed, the end joint small. 

 The terminal claw is very long and slender, and is accompanied by a 

 spiniform seta nearly equal to half the length of the claw (fig 7). Both 

 branches of the first pair of swimming-feet are short and two-jointed, and 

 somewhat widely apart ; the second joint is rather shorter than the first in 

 both branches (fig. 8). The second and third pairs are only one-branched, 

 the inner branches being apparently entirely absent. Each branch consists 

 of three joints, the middle one being shorter than the one on either side. 

 The first two joints are each armed with a moderately stout slightly 

 curved spine on the outer distal angles, while the last joint carries two 

 terminal spines (fig. 9). In the fourth pair the inner branches are 

 slender and two-jointed. The end joint is small, and provided with a 

 moderately stout terminal spine. The outer branches are three-jointed. 

 The joints are sub-equal, and armed similar to those of the second 

 and third pairs (fig. 10). Fifth pair small and foliaceous. Each 

 consists of a basal and a secondary joint. The inner portion is produced 

 into a sub-cylindrical lobe, rounded at the end, and bearing two terminal 

 hairs. The outer portion is also produced, but not so much as the inner 

 portion, and bears one hair. The small secondary joint is situated in the 

 hollow between the two produced portions of the basal joint, and is fur- 

 nished with three terminal hairs (fig. 11). Caudal stylets elongate, and each 

 composed of two distinct joints. The first joint is about one and a half 

 times the length of the last abdominal segment, and about three times 

 longer than broad, and has the inner distal angle produced into a blunt- 

 pointed tooth-like process. The second joint (or appendage to the stylets) 

 is of an elongate oval form, and equal to about one-third the length of 

 the first joint to which it is attached by a narrow hinge-like articulation. 

 Habitat. — West of Queensferry. Washed from lumps of hardened 

 mud composed of the agglutinated tubes of a species of Sabeila. Kare. 

 No males have yet been observed. 



Genus Dactylopus, Claus (1863). 



Dactylopus stromii (Baird). 



1850. Canthocamptus stromii, Baird (2), p. 208, pi. xxvii. fig. 3. 

 1880. Dactylopus stromii, Brady (8), p. 3, pi. lv. figs. 1-13. 



1892. Dactylopus stromii, Canu (11), p. 159. 



1893. Dactylopus stromii, I. C. Thompson (33), p. 27, pi. xxii. 

 fig. 4 a, b. 



