260 Part III. — Tenth Annual Report 



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Cylindropsyllus minor. ij (PI. XL figs. 17-24). 



Female. — In the female the body is cylindrical and elongate. Length, 

 exclusive of tail setae, 1 mm., the first thoracic segment nearly as long 

 as the next three together, rostrum short with a rounded apex. Anterior 

 antennae about as long as the first thoracic segment, seven-jointed \ the 

 comparative length of the joints are as shown in the formula 



7 ' 18 • 9 • 4 • 5 • 4 • 8 



1 . 2.3.4.5.6.7 



Sparingly setiferous. An olfactory filament springs from the end of the 

 fourth joint, which is produced to form a base for the filament. The 

 posterior antennae, mandibles, maxillae, and anterior foot-jaws as in Tetra- 

 goniceps incertus. Posterior foot-jaw two-jointed and armed with a long, 

 stout, terminal claw which is ciliate on the inner margin of the distal half. 

 A spine springs from the end of the first joint and projects forward so as to 

 be opposed to the extremity of the terminal claw. The outer branch of the 

 first four pairs of swimming feet three-jointed, the inner branch of the first 

 and fourth pairs two-jointed, of the second and third one-jointed, the inner 

 and outer branches of first pair nearly equal, but the inner rather longer, 

 sparingly setiferous. The one-jointed inner branch of the second and 

 third pairs shorter than the first joint of the outer branch, and terminating 

 in a short stout spine ; a moderately long slender bair springs from near 

 the middle of the one-jointed inner branch of the third pair. The outer 

 branch of the fourth pair is nearly twice as long as that of any of the 

 preceding pairs. The two first joints are about equal in length ; the last 

 is rather shorter, and furnished with one very short and three long setae. 

 The inner branch, which is two-jointed, is scarcely longer than the first 

 joint of the outer branch, and provided with a short terminal plumose spine 

 or stout setae. Fifth pair foliaceous, small, one-branched, the posterior 

 margin armed with six plain setae, and, exteriorly, with a stout spine. 

 Abdomen four-jointed, first segment rather longer than any of the other 

 three. Caudal stylets about as long as the last abdominal segment, 

 slightly divergent, and bearing a lanceolate spiniform terminal process and 

 a few very small hairs. Ovisacs two, each with four ova placed end to 

 end as shown in the figure. 



CP5 ill Odes (?) lasbeme^ss littoralis* n. sp. (PI. X. figs. 1-9). 



Male. — Length about 1*12 mm. (exclusive of tail setae). In form some- 

 what like Lichomolgus arenicolus. Anterior antennae short, seven-jointed, 

 the proportional length of the joints as shown by the formula t 



16 • 24 • 12 • 23 • 15 • 18 • 16 

 1 • 2' 3- 4- 5 • 6- 7" 

 All the joints more or less setiferous ; the second joint is furnished with a 

 number of moderately short, and two long setae. Posterior antennae stout, 

 four-jointed, the length of the joints gradually decreasing, the last about 

 as broad as long, quadrangular, and bearing about six long, unequal, and 

 plain terminal hairs and one plumose seta, the exterior margin of the 

 second and third joints ciliated. Two spines, one of which is stout and 

 strongly curved, and two setae, spring from the exterior distal angle of the 

 third joint as shown in the figure. There is no secondary ap- 

 pendage to the posterior antennae. Mandible stout, consisting of a broad 



* Of or belonging to the shore. 



t When first examined the three last joints of the anterior antennae were observed 

 to be nearly equal in length, but the last one became detached before the joints were 

 measured. The length stated, though closely approximate, may therefore not be quite 

 correct. 



