REVISION OF THE SARCOPSYLLIDAE 
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former two genera into a patch of eight grooves on each side, while Echidnophaga 
agrees with the Pulicidae in having a larger number of grooves (as many as thirteen 
or fourteen on each side). The anal (or tenth) segment is in so far of interest in the 
Sarcopsyllids as the stylet is missing in the $ $ of Hectopsylla and Dermatophilus, while 
it is present in Echidnophaga. The absence of the stylet is, however, not confined to 
those two genera of Siphonaplera, the genera Lycopsylla and Chaetopsylla among the 
Pulicidae being also without a stylet. 
The number of stigmata is the same in the Sarcopsyllids as in other Siphonaplera, 
with the exception of Dermatophilus. In this genus the second and third segments 
of the abdomen have lost the stigmata in the female, doubtless in connexion with the 
peculiar mode of expansion referred to above. The stigmata or rather the cavities in 
which they are situated, are often different in the sexes of Sarcopsyl/idae. The stigma 
of the eighth segment is always large. There is a peculiar difference in respect to 
this stigma between the three genera. In Echidnophaga the cavity of this stigma is 
hairy as in other Siphonaptera. In Dermatophilus the hairs are few in number, and 
in Hectoysylla there are no hairs in the cavity. The female has only one bursa copu- 
latrix. 
List of genera and species mentioned in the introduction : — 
Ceratophyllus Curtis, Brit. Ent. IX. no. 417 (1832). 
Ceratophyllus charlottensis Baker, Journ. N. 1 ork Ent. Soe. VI. p. 56 (1898). 
Ceratophyllus hilli Rothschild, Nov. ZooI. IX. p. 622. n. 15. t. 11. fig. 43, 44 (1904). 
Chaetopsylla Kohaut, Al/att. Kozlem. II. p. 37 (1903). 
Ctenoeephalus canis Curtis, Brit. Ent. III. no. 1 14. fig. A — E, and 8 (1826). 
Ctenocephalus felis Bouche, Nov. Act. Acad. Leap. Carol. Nat. Cur. XVII. 1. p. 505 (1835). 
Ctenophthalmus Kolenati, Paras. Chiropt. p. 33 (1857). 
Ctenophthalmus wenmanni Rothschild, Nov. Zool. IX. p. 642. n. 31 t. 14. fig. 75, 77, 79 (1904). 
Ischnopsylla Westwood, Intr. Classif. Ins., Synops. Gen. p. 125 (1840). 
Lycopsylla novus Rothschild, I.e. p. 602. 11. 1 . t. 7. fig. 1-4 (1904). 
Malacopsylla Weyenbergh, Period. Zool. III. p. 271 (1881). 
Pulex australis Rothschild, I.e. IX. p. 613. n. 8. t. 9. 10. fig. 29, 34, 36 (1904). 
Pulex bohlsi Wagner, Hor. Sec Ent. Ross. XXXV. p. 5 (1900). 
Pulex cleopatrae Rothschild, Ent. Mo. Mag. (2). XIV. p. 84. t. 1, 2. fig. 4, 8, 13, 17 (1903). 
Pulex eleophontis id., Nov. Zool. IX. p. 614, n. 9. t. 10. fig. 32 (1904). 
Pulex eocy u id., I.e. p. 617. n. 12. t. 9, 10. fig. 26, 31 (1904). 
Putcx irritans Linne, Syst. Nat. ed. X. p. 614. n. 1 (1758), 
Pulex leporis Curtis, Brit. Ent. IX. n. 417 (1832). 
Pulex paltidus Taschenberg, Die F/b'hc p. 65. t. 1. fig. 9 (1880). 
Pulex nubicus Rothschild, Ent. Mo. Mag. (2). XIV. p. 84. t. 11. fig. 10, 16 (1903). 
Pulex riggenbachi id., Nov. Zool. IX. p. 61 1. n. 7. t. 8, 9. fig. 19, 20, 24 (1904). 
Pulex simonsi id., I.e. IX. p. 616. n. 11. t. 9, 10. fig. 30, 37 (1904). 
Vermipsylla Schimkewitsch, Zool. Anz. VIII. p. 75 (1885). 
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