NO. 1417. 



REVISION OF AMERICAN SIPHONAPTERA— BAKER. 129 



BB. Head and prothorax with ctenidia. 



C. Head long and not deep, the genal area gniall and provided along it8 whole 



length with a ctenidinm Ctenocepludas Kolenati 



(type, cavis) 

 CC. Head short and deep, the genal area very large and with an oblique cteni- 

 dinm on its posterior portion only Spilopsyllnn, new genus. 



(type, leporis) 

 AA. Legs more slender; female with two to five antepygidial hristles on either side. 

 B. Head without etenidia; eyes usually well developed; last joint of hind tarsi 

 with four or five spines on either side. 

 C. Inner side of hind cox;e distally with a comb of minute teeth. 



Odout.upKt/Uus, new genus 

 (type, multlsjnnosus) 

 CC. Inner side of hind coxte without a comb of minute teeth. 



Dv Last joint of hind tarsi with five pairs of lateral spines and a supernumerary 



pair at the middle Dasi/psi/llii^i, new genus 



(type, per}) h ina tus ) 

 DD. Last joint of hind tarsi with'hve pairs of lateral spines, all in line or only 



the first pair slightly dislocated Ceratopliyllus Curtis 



(type, gallinx) 

 BB. Head with ctenidia; eyes usually rudimentary. 



C. Last article of hind tarsi with five pairs of normally placed lateral spines, 

 and with two minute subapical ones on the disk. 



Ti/jjliloceras "Wagner 



(type, poppet) 



CC. Last joint of hind tarsi with four pairs of well developed, normally placed 



lateral spines, the fifth pair reduced to hairs. 



D. Last article of hind tarsi with two subbasal and two subapical approximate 



supernumerary spines on the disk. 



E. Third pair of lateral spines normal I'aleopnylla Wagner 



(type, xihirica) 

 EE. Third pair of lateral si)ines reduced to hairs . .Ocnnpldhalmui^ Kolenati 



( type, hisoclodenlalvii) 

 DD. Last article of hind tarsi with only two approximate suj)ernumerary 



si)ines on the disk and these subapical NeuitKijlla Wagner 



(type, hldentatiforinis) 



Genus PULEX Linnasus. 



1893. Pulex Bezzi, Rev. Ital. .Sci. Nat. y Boll. Nat., XIll, j). ]:!7. 



1903. Pulex KoHAUT, Magyar, bolhai, p. 32. 



1903. Pulex Enderlein, Deutsches Tief-see Exped., lcS98-99, 111, p. 259. 



1904. PuZea; TiRABOSCHi, Archiv. de Parasit., VIII, p. 245. 



SYNOPSIS OF SPECIES. 



A. Teeth in coxal comb numerous and in an irregular row. 



B. Labial palpi one-half length of anterior coxte irritam 



BB. Labial palpi three-fourths of anterior cox;e or more dugesii 



AA. Teeth in coxal comb six, and in a regular row brasdiensis 



Genus RHOPALOPSYLLUS, new genus. 



This genus will pro)>til)ly prove one of the g-rcatest interest eco- 

 nomically in the Siphonaptera. It is here that we tiiid most of those 

 American species of tropical rat fleas which may possi])ly be concerned 

 Proc. N. M. vol. xxix— 05 9 



