148 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 50. 



As in the foregoing species the brief description of the male bursa 

 does not permit at present of a generic determination of this species, 

 but the presence of two uteri in the female indicates that it belongs 

 in the subfamily Trichostrongylinae. 



STRONGYLUS LEPORUM (Moniez, 1880) Moniez, 1889. 



Synonym. — Spiroptera leporum Moniez, 1880. 



Specific diagnosis. — (?) Trichostrongylinae (p. 123): Body red 

 from red coloration of coelomic fluid. Body attenuates anteriorly, 

 then enlarges abruptly in the head region. Cuticle transversely stri- 

 ated, except on the bursa of the male. Head with four simple lips 

 W'ithout appendices. 



Male less than 10 mm. long and with a maximum thickness of 

 270 jx. Bursa with a dorsal and two lateral lobes. The bursa is lon- 

 gitudinally striated. The dorsal ray bifurcates at the proximal 

 third, each branch dividing to form two short terminal forks, of 

 which the external is the shorter. The spicules are deep red, 1.98 to 

 2.03 mm. long and enlarge gently distally. Toward the distal ex- 

 tremity, over a distance of half the spicule length to just the distal 

 part, they are united by a thin chitinous lamella forming a channel. 

 This chitinous lamella projects slightly beyond the spicules, forming 

 a sort of appendage, below which is a hook attachment to the spicule. 

 The free portions of the spicules have a minimum diameter of 22 /x,, 

 while the united distal portions have a maximum diameter of 65 fi. 



Feinole a little more than 10 mm. long, with a maximum thickness 

 of 450 /t. Eggs average 80 by 40 ^ in diameter, thin shelled, and seg- 

 menting at oviposition. 



Hosts. — Oryctolagus cunlculus (Lepus cuniculus), Lepus euro- 

 paeus {Lepus tinfddus). 



Location. — Under the gastric mucosa. 



Locality. — Northern France (Ambleteuse, Pas-de-Calais; Grof- 

 fliers, Pas-de-Calais; Forest of Marchienes). 



This species, originally described by Moniez as a Spiroj)tera, was 

 later described as a Strongyhis, but without the bursa characteristics 

 necessary for present-day generic determination. Moniez indicates 

 that there are five simple rays in each lateral lobe, but gives no fur- 

 ther data. 



SizTDfamily KELIG-JVLOSOIVIIN'^H: Travassos, 1914&. 



Subfamily diagnosis. — Trichostrongylidae (p. 123) : Body fre- 

 quently coiled in a spiral. Females with one ovary. 



Type-genus. — Lleligmosomimi Railliet and Henry, 1909<z. 



