OF WASHINGTON, VOLUME XVII, 1915 



103 





rounded caudad, but apparently united, actually separated, like rest of 

 pygidial posterior margin enveloped in a filmy membrane, intervening 

 space at base roundly emarginate, 

 project but 10 n caudad of main 

 marginal line. Second pair but 

 slight, triangular elevations on 

 marginal line. Incisions: None. 

 Paraphyses: Fairly distinct at 



sutures of two last segments, / I 



somewhat clavate c e p h a 1 a d . 

 Plates: None. Spines: One each 

 side of median lobes, on dorsum 

 and ventrum; also one dorsal at 

 anterior end of segmental margin. 

 Anal opening: Rather small, 

 evidently posteriorly directed, 

 circular, central within chitinized 

 longitudinally oval area, about 

 one-fourth length from base of 

 pygidium. Paragenitals: 3 groups, 

 the laterals elongate, apparently 



anterior and posterior group united. Anterior 12-17 glands; lateral 29-33. 

 IIU-CK: Very numerous, especially on more chitinized portions of 



Fig. 1. Odonaspis ruthae. 

 tour of female. 



Con- 



Fig. 2. Odonaspis ruthae. Pygidium of female. 



abdominal segments, arranged in more or less regular rows longitudi- 

 nally. Basal thickenings: None. }'< i/lrnl thickenings: None. Second 

 stage described by author in paper above referred to. 



Type: Material and slide in U. S. coccid collection No. 14089, 

 from which this description is made. 



