the fleas of north america 85 



Key to North American Genera of Hystrichopsyllinae 



1. Coxa III with a row or patch of spinelets on inner surface; genal 



comb with only 2 spines which overlap each other 2 



Coxa III without a row or patch of spinelets on inner surface 3 



2. Labial palpus reaching to apex of coxa I ; anterior abdominal tergal 



plates with apical spines Phalacropsylla Rothschild. 



Labial palpus not reaching beyond three-fourths the distance to apex 



of coxa I : anterior abdominal tergal plates without apical spines 



Hernials Jordan. 



3. Abdomen with 1 complete comb of long spines in addition to small 



apical spines; segment V of each tarsus with only 4 pairs of lateral 

 plantar bristles ; labial palpus with only 2 segments ; female with 1 



receptaculum seminis Stenoponia Jordan and Rothschild. 



Abdomen without a comb of long spines, but with combs of short apical 

 spines; segment of V of each tarsus with 5 pairs of lateral plantar 

 bristles ; labial palpus with 5 segments ; female with 2 receptacula 

 seminis Hystricliopsylla Taschenberg. 



The Genus Phalacropsylla Rothschild 



Phalacropsylla Rothschild, 1915. Ectoparasites 1: 39. Monotypic. Type, Phala- 

 cropsylla paradisea Rothschild. 



No species belonging to this genus has been available to the authors 

 for study. The following redescription is compiled from the litera- 

 ture. 



Genal comb consisting of 2 spines so arranged that 1 crosses the other. Eyes 

 vestigial. Labial palpus reaching to apex of coxa I. Pronotum with a comb. 

 Anterior abdominal tergal plates with apical spines. Three antepygidial bristles 

 present on a side. Coxa III with a patch of small bristles and spinelets on 

 the inner surface. Fifth tarsal segment of each leg with 4 pairs of lateral plantar 

 hristles and a basal, submedian, ventral pair. Ventral arm of sternal plate IX 

 with a row of several stout, spinelike setae, below which are several longer ones. 



This genus includes but two species, both from North America. 



Phalacropsylla allos Wagner 



Phalacropsylla alios Wagner, 1936, Ztschr. f. Parasitenk. 8: 657, fig. 6. 



Type host. — Neotoma cinerea Ord (wood rat). 



Type locality, — Logan. Utah. 



Range. — Known only from the type locality. 



The original description of this species is accompanied by a figure 

 of the apical end of the ventral arm of sternal plate IX of the male. 

 In 1939 Wagner (80, p. 88) published a figure of the male head. 



Phalacropsylla paradisea Rothschild 



Phalacropsylla paradisea Rothschild, 1915, Ectoparasites 1: 39, figs. 42-43. 



Cotype hosts. — Epimys sp. and Mus. sp. (mice). 

 Type locality. — Paradise, Ariz. 

 Range. — Known only from Arizona. 



The original description of this species is accompanied by illustra- 

 tions of the male and female terminalia. 



