68 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVII. 



probable that Fritz Miiller could have referred his species to the genus 

 Bopyrus had there been any such appendages to the pleon, 



PROBOPYRUS BITHYNIS, new species. 



Body of female with dorsal surface perfectl}^ white, having only 

 three small patches of black on one side at the post-lateral parts of the 



Fig. 46.— Probopyrus bithynis. a, dorsal view of female; h, ventral view of same. + 16. 



second, third, and fourth thoracic segments. Ventral side of the l)ody 

 with the first pair of incubatory lamella? almost entireh^ covered with 



patches of black, and with all the other 

 lamella^ of one side having patches of 

 black, those of the other side being with- 

 out these patches, with the exception in 

 some specimens of the second lamella. 

 Patches of black also on the ventral side 

 of the lateral margins of the second, third, 

 and fourth thoracic segments of one side — 

 the same side on which these markings 

 occur on the dorsal surface and to which 

 the incubatory lamella?, 

 likewise marked with 

 Legs of both sides white and 



Fig. 47.— Peobopyris bithynis, first 

 lamella of marsupium, right side. 

 + 10. 



patches, are attached, 

 without any markings 



Head with antero-lateral corners produced into 

 prominent processes; anterior margin between these 

 processes straight; posterior margin narrowly rounded. 

 Length of head about equal to breadth. Eyes wanting. 



The thoracic segments are distinctly defined. Ova- 

 rian bosses are present on all the segments, occupying only the ante- 

 rior portion of the sublateral margin of the first four segments. The 

 epimera are evident as narrow pieces lateral to the ovarian bosses on 

 all the segments. 



Fig. 48.— P r o b o p y- 

 ris bithynis, leg 

 of sixth pair of 

 adult female. 



+ 39. 



