124 PROCEEDINGS' OF THE NATIONAL MUSEUM. vol. xxix. 



B. Fiftli tarsal joint broadly dilated and greatly lengthened beyond the fourth 

 pair of lateral spines; fore tibia^ armed on posterior border, 

 very large black teeth or a few heavy spines; fifth tarsal 

 article on forelegs as long as rest of tarsus, on all the legs with 

 the claws nearly as long as the fifth joint; fore cox;e nearly 



nude, with but few long spines Malacopsyllid^. 



BB. Fifth tarsal joint never greatly enlarged, never as long as the rest of tar- 

 sus, the claws shorter; fore tibise armed on posterior border 

 with slender spines; fore coxse always clothed on outer side 

 with several to numerous oblique rows of bristles. 

 C. Gena with a large recurved process on lower margin extended downward and 

 backward; labial palpus five-jointed; mandibles not distinctly 

 serrate; maxilhe long, rather narrow, and obtuse at apex; 

 eye distinct; ctenidia absent; antepygidial bristles absent; 



anal style of female absent Lycopsvllid^ 



CC. Gena never with a recurved process; mandibles usually distinctly serrate; 

 anal style present in female. 

 I). Maxilla' triangular, acute at apex. 



E. Posterior tibial spines in pairs and few in number, not in a very close-set 



row PULICID.E 



EE. Posterior til)ial sjiine? numerous, mostly single and in a close-set 



row Ctenopsyllid.e 



EEPl Posterior tibial spines in numerous, short, close-set transverse rows 

 on posterior border with about four spines in each row. 



Hysteichopsyllid^ 

 DD. Maxillae clavate or subquadrangular; face strongly sloping forward and 

 recurved just above the mouth, where there are two tooth- 

 like plates on each side; eyes absent; pronotum and usually 

 abdomen with ctenidia; confined to bats .. .Ceratopsyllid^ 



Family RHYNCHOPRIONID^E. 



1880. tSarcop.viUvhr Taschenberg, Die Fl(")he, p. 43. 



It was suggested in the Revision that the name Rliynchoprion — 

 based as it was upon a well-known species as a type — should be used 

 instead of SaiTOjysylla., though in the body of the text the author did 

 not then have the courage to make the change. Since then no dis- 

 senting voice has been heard. No less than twenty-seven years after 

 S(frr(>jMi/II(/ had been proposed, with the same type, the eminent ento- 

 mologist, Karsten, adhered to Rhiineliopi'lon as the correct name. It 

 is a pity that his judgment could not have been followed, since we 

 are compelled now, after a considerable literature has accumulated 

 under the name SarcopsyUa^ to use again the older and onl}" correct 

 name. 



Mr. W. el. Rainbow, of the Australian Museum, has recently kindly 

 sent to me sketches made from the t3^pes of Echidnophaga amhulmi.s 

 Olliff, which fortunately are preserved in that museum. These 

 sketches, while they do not enable me to present a diagnosis of the 

 genus, are very important, in that they indicate this form as unmis- 

 takably of the Rhynchoprionidai, a fact wholly impossible to obtain 



