(542) 



2. Ceratophyllus columbae (Walcken. & Gerv.),* figs. 3. 9. S 11. 14. 18. ?. 

 Pulex culwmbae (Walckeu. & Gerv.), Hist. Nat. Ins., AptLves III. p. 375 (1844). 



Slightly smaller than C. gallinae, measuring 3 mm. in length. The palpi in the 

 female are shorter than the rostrum. The prothoracic comb consists of twenty-eight 

 teeth. 



In the Tnale the area of the eighth tergite bearing the short hairs is reduced to a 

 narrow submarginal strip. The tergite externally (fig. 9) is similar to that of (jaUinae, 

 but has fewer hairs on the margin. The eighth stemite bears at the end on each side 

 three short stout bristles, but there is no distal membraneous process. The process 

 p of the ninth tergite is club-shaped, and bears two very short and one long hair. 

 The " movable finger " (fig. 3. f.) is slenderer than in gallinae, its ventral edge bearing 

 five hairs, of which the first and fourth are the shortest. The distal portion of the 

 ninth sternite is likewise slenderer than in gallinae and bears a fringe of hairs 

 proximally. 



In the/e?)i,o/e the sinus of the seventh sternite (fig. 14) is much deeper than in 

 gallinae. The difference between the outlines of this stemite in gallinae and 

 columbae is plainly visible, even when the segments are in situ, as in figs. 17 and 18. 

 The hairs on the seventh stemite are similarly distributed to those in gallinae, but 

 are fewer in number. 



The eighth tergite (fig. 11) is more angulated below the stigma than in gallinae. 

 The distal margin is not emarginate. There is a row of short hairs above the stigma 

 with a few hairs a httle further back. There are three hairs below the stigma and 

 a few more, chiefly marginal or submarginal, placed ventro-apically, of these latter 

 hairs five are short and very .stout. The abdominal gland resembles that of gallinae. 



This species is parasitic on Cohimba livia. I have specimens from the domestic 

 variety, and am indebted to Mr. W. R. Ogilvie Grant for a nice set from the wild 

 bird from the Stacks of Cromarty, in Scotland. 



3. Ceratophyllus hirundinis Curtis f figs. 4. S 12. 15. 20. ?. 

 Ceratophyllus hirundinis Curtis, Brit. Ent. IX. 1832. No. 417. 



A very pale species, measuring 2 3 mm. in length. The palpi in the female are 

 shorter than the rostrum. 



The eighth tergite in the male resembles that o{ gallinae especially with regard 

 to the internal area covered with short bristles. There are more long hairs on the 

 apical margin in the present species than in gallinae. The eight sternite is wider 

 apically in G. hirundinis than in the other three species, sub-truncate, and produced 

 obliquely dorsad. It further bears a membraneous flap on each side, the flaps being 

 fused together and surrounded by a large number of apical hairs. 



The process p of the ninth tergite is shaped as in columbae, but is thinner. 

 The " movable finger " (fig. 4. f.) is boot-shaped, the sole directed distad ; it bears 

 one stout and rather long hair at the toe and two similar hairs at the heel. 



The ninth sternite (fig. 4. IX. v.) is similar to that of gallinae, but the ajiical 

 portion is slenderer. 



• Stephen's name of columhof, Britith Entomnl. IX. (1832) No. 417, must be rejected as a "nomen 

 nudum." 



t Possibly Pulrx hirundinit, Kiihler, Uehenicht d. Arh. u. Veriind. d. ScliU-t. Geselltch. f. vaterl. 

 JiuUvr. p. 75, 1831, may refer to this species. 



