96 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Female free fourth pedigerous segment distinct from cephalothorax, 

 also from genital segment on ventral but not on dorsal surface. Seg- 

 ment short, expanded medially into small, flaplike projections over 

 place of attachment of fourth thoracic legs. Genital segment (fig. Md) 

 broader posteriorly, tapered regularly from slightly narrower anterior 

 end, lateral posterior surface slightly lobate. Fifth legs (fig. 34/) 

 situated on posterolateral surface, consisting of minute, knoblike 

 swelling, bearing single plumose setule, additional spikelike projection 

 present immediately posterior to swelling, bearing 3 plumose setules, 

 2 on dorsal surface, third on distal inner surface. 



Female abdomen indistinctly 2-segmented, incompletely separable 

 from genital segment. First segment butterfly shaped; second seg- 

 ment subrectangular except for lobate outer distal surfaces, lobes 

 denticulated. Caudal rami slightly narrower proximally than dis- 

 tally, distal half of inner margin plimiose, distal surface with 3 plumose 

 setae medially and 1 laterally in addition to 2 plumose setules, 1 adja- 

 cent to both outer and inner setae. 



Male cephalothorax (fig. 346) similar to that of female. Free fourth 

 pedigerous segment -with smaller lateral projections situated more 

 posteriorly, but still over position of leg attachment. Genital seg- 

 ment (fig. 34e) distinct from both free fomth pedigerous seg- 

 ment and abdomen, lateral surfaces broadly convex, fifth legs (fig. 34/) 

 spikelike, projecting from posterior lateral sm-faces, spike bearing 

 plumose setule from nodule on proximal dorsal surface, plumose 

 setule from distal dorsal surface, and plumose setule from distal 

 surface. Sixth legs (fig. 34^) present medial to fifth, consisting of 

 node bearing 2 plumose setules distaUy. (The condition of the fiftli 

 and sixth legs of the male approaches that of the male of Dentigryps.) 

 Abdomen appearing as 1 segment although indistinct evidence of 

 second segment visible in posterior half. Abdomen broader anteriorly 

 than posteriorly, lateral margins flatly concave, dorsal surface strongly 

 concave. Outer distal surfaces lobate, lobes denticulated. Caudal 

 rami as in female. 



Female and male antennule (fig. 356) 2-segmented, attached to 

 ventral-lateral anterior surface of cephalothorax, just posterior to 

 division between frontal region and remaining cephalothorax. First 

 segment approximately IK times the length of second, distal half of 

 anterior and anterior ventral surface bearing approximately 26 hghtly 

 plumose setae and setules. Second segment elongate, slightly longer 

 in male than in female, with single naked setule from posterior medial 

 surface, 1 1 from distal surface. Female antenna (fig. 35c) 3-segmented, 

 situated slightly medial and posterior to antennule base. First seg- 

 ment short, knoblike, with small, heavily sclerotized subcorneal pro- 

 jection from posterior surface. Second segment short, subrectangular ; 



