NOVITATKS ZOOLOOICAE XL. l!Kt7. 283 RECORDS AND DESCRIPTIONS OF SIPHONAPTERA. By DR. KARL JORDAN, F.R.S. (With 10 text-figures.) A COLLECTION of fleas sent to me for identification by Dr. J. Bequaert, -'*• Harvard Medical School, Boston, Mass., contains several new species from Africa and Asia, which are here described. Many of the other species are from places whence we have no record of fleas, or were obtained on hosts new for the species. A list of the collection, therefore, is of some value. The new bat-flea is a most interesting insect, upsetting our concept of a bat-flea by possessing three instead of two fully developed preoral spines, suggesting that the bat-fleas have originated from an ancestral form which had a row of spines along the ventral margin of the head. The vestigial third spine of ChiropteropsyUa brockmanni Roths. 1915 points in the same direction. I am much indebted to Dr. J. Bequaert for allowing me to keep the types and other specimens for the N. C. Rothschild (British Museum) collection. In order to facilitate the use of this article, I divide the list into two sections, the first dealing with American species only, and the second with the species from the Eastern Hemisphere. I. AMERICAN SPECIES. 1. Echidnophaga gallinaceus Westw. 1875. Florida : Sebastian, on Spilogale ambarvalis, 3 $$. 2. Pulex irritans L. 1758. Mexico : Monclova, on Indians, 2 $$. Proboscis short. 3. Ctenocephalides felis felis Bouche 1835. Florida : Sebastian, on Spiloyah ambarvalis, 1 $. 4. Ctenocephalides canis Curtis 1826. Mexico : Monclova, on Indians, 2 $$. 5. Hoplopsyllus glacialis glacialis Taschenb. 1880. East Greenland : Franz Josef Fjord, on Polar Hare, 2 J^J, 3 ?$. C. Hoplopsyllus glacialis lynx Baker I'Jol. New Hampshire : on Lijnx canadensis, 3 cJcJ. 7 ??. 7. Cediopsylla simplex Baker iso,"). Massachusetts : on Sylvilagus floridanus Iransitionalis, 2 (J (J, 4 $$.