Lxix] ENTOMOLOGICAL NEWS 161 Mexican Jungle and Desert Fleas with Three new Descriptions By C. ANDRESEN HUBBARD, Tigard 23, Oregon I have before me at this time the results of two collections of fleas from Mexico. Dr. Murray Johnson, physician and sur-geon, and well known west coast mammologist of Tacoma, Washington, collecting 35 miles north of Los Mochis on the border between Sinoloa and Sonora, Mexico on March 23, 1954, removed Orchopeas s. fireman! Hubbard, 4 males and 5 females off Tcanopits phcnax (woodrat), and on March 12-14, 1956 at Alamos, Sonora ; Echidnophaga gallinacea (Westwood), 4 males, 12 females off Brassariscus astulus (ringtail cat) ; off Didelphis m. mesa-mericamts (opossum), 61 males, 353 females; Pulex simulans Baker, 10 males, 8 females off Brassariscus austulus; 31 males, 35 females off Didelphis m. mesaincri-canus and off Citcllus y. rupestis (ground squirrel), 10 males, 12 females; Ctenocephalides f. felis (Bouche), 1 male and 2 females off Didelphis m. mcsarnericanus. It is to be noted in the above that for the first time in over 50 years the determination of Pulex simulans Baker has been used. Mr. Frans Smit of the British Museum, who studied the fleas involved, thinks he has found the characteristics upon which Baker made the original description in 1895. Practically all investigators to date have considered P. simulans a synonym of P. irritans. Smit is quite serious in his contention that P. simulans is a good species and has determined Pulex from cen-tral California for the writer as P. simulans. The second collection before me was made by Mr. C. Hayden formerly of Riverdale, California but whose present whereabouts is unknown to the writer. During December of 1955 and Janu-ary and February of 1956 Mr. Hayden was collecting about Mexico City. Six areas were visited, 14 different hosts ex-
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