136 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



Family CTENOPSYLLID^E, new family. 



1904. TjiphlnptiijWvn' jiart Tiraboschi, Archiv. de Parasit., VIII, p. 242, 275. 



Attention had been previously called to the close relationship of 

 Ctenojm/llf/s and Stephmiocircus as indicated by the most essential 

 characters. They form a group equivalent to the other families of 

 flea"S. A name for the group drawn from the wholly untenable 

 " Typhlopsylla^ could not be used in any event. 



Genus CTENOPSYLLUS Kolenati. 



1893. Typhlopsylla part Bezzi, Kev. Ital. Soc. Nat. y Bull. Nat., XIII, p. 137. 



1903. Clenopsylla Wagner, Hone Soo. Eiit. Ross., XXXVI, p. 149. 



1903. TypJdopsylla part and Cteuojisylla Kohaut, Mag\'ar. bolhai, pp. 53, 58. 



1904. Ctenopsyllus Tiraboschi, Archiv. de Parasit., VIII, p. 276. 



SYNOPSIS OF AMP]RICAN SPECIES. 



A. Head without ctenidia alpinus 



AA. Head with ctenidia. 



B. Head ctenidia of two .spines.each hesperomys 



BB. Head (;tenidia of four spines )iiusculi 



BBB. Head ctenidia of five spines. 



C. Pronotal ctenidium of thirty to forty spines (female) or fifty to fifty-six spines 

 (male); ei^ihtii tergite in female with ventral group of numerous 



bristles hrooksi 



CC. Pronotal ctenidium in female of twenty-four spines. 



D. Pronotal ctenidium in male of twenty-eight spines; eighth tergite in female 



with ventral grou}) of two bristles hyglni 



DD. Pronotal ctenidium in male of thirty-four spines; eighth tergite in female 

 with ventral group of four 1 jristles liyrlaci 



Genus STEPH ANOCIRCUS Skuse. 



1903. Slephanocircus Rainbow, Records of Australian Museum, V, No. 1, p. 53. 



Rothschild has worked out the anatomy of the females of several 

 species of this genus most thoroughly. The males still remain undis- 

 covered. The tangle in connection with the original t3^pes of the 

 genus has been unraveled b}" Mr. Rainbow. 



Family HYSTRICHOPSYLLID.E, new family. 



1904. IlystricJiopsyllitin Tiraboschi, Archiv. de Parasit., VIII, pp. 242, 296. 



Tiraboschi rightly appreciated the wide distinctness of the genus 

 llijHtrlchopsylla., but it is here given the full standing of a family, 

 which it deserves. 



