54' ILLINOIS BIOLOGICAL MONOGRAPHS [264 



resemblance to one another, and it has been usual to relegate them all to the 

 species Stenophora juli Frantzius. . . . The Julidae of this region are infected 

 with certainly two and possibly three species of Stenophora, while the classic 

 5". juli apparently does not occur. Of these species, one is unquestionably the 

 form described by Leidy (1853) as Gregarina julipusilli. As indicated by the 

 specific name, Leidy considered its host to be Julus pusillus Say. According to 

 Bollman (1887) this milliped, correctly Julus minutus Brandt does not occur in 

 Pennsylvania, and it may be that Leidy was mistaken in his identification. This 

 matter is not, however, of any great importance, and the specific name of the 

 gregarine must stand. Leidy spelled the specific name of the host pusullus, 

 whereas Say's memoir (1821) renders it pusillus, which spelling will be used for 

 the name of the gregarine." 



Leidy 's original spelling of the host name (1853 :238) pusillus is the 

 correct one and the last remark of Crawley is uncalled for. The correct 

 name of the diplopod, according to Bollman (1893), is now Nemasoma 

 minutum (Brandt). 



Since Leidy 's description and figures are so inadequate and even 

 his determination of the host possibly in error, there was no valid rea- 

 son for Crawley 's having retained the specific name julipusilli when he 

 redescribed the species (1903a: 634-5). 



Leger and Duboscq in the citation just given mention (1904) 8. 

 iulipusilli (Leidy) Crawley as a distinct species (note the last quotation). 



In the specific diagnosis, given at the beginning of this species, 

 Leidy 's description was excluded. It is as follows : 



"Gregarina Juli pusilli. White, translucent, oval. Cephalic sac hexahedral, 

 with the sides rounded or forming a double cone, base to base, with the upper 

 apex subacute or truncated in younger individuals. Posterior sac robust, oval; 

 granular contents, fine, translucent; interior corpuscle, globular, transparent; 

 nucleus transparent, without nucleolus. Whole length from i 1500 in. to I 275 in. 

 Breadth of largest I 500 in. Diameter of head of largest I 1500 in. Hab. Intes- 

 tine Julus pusillus." 



The name of this species must be a binominal and since Labbe was 

 the first to give such a name to the particular species here designated, 

 the species name becomes Stenophora julipusilli (Labbe) Crawley. 



