64 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lis 



well developed, length slightly less than three-fifths combined lengths 

 of rest of segments, with irregular areas of heavy sclerotization, 

 grooves and other superficial markings in addition to 6 naked setules 

 on proximal half of anterior ventral surface, 1 naked setule on poste- 

 roventral surface in proximal region and naked setule (not shown 

 in figure) on median dorsal surface. Second segment short, length 

 slightly less than one-fifth that of first segment, with 1 naked setule 

 from distal portion of anterior lateral surface, 3 from ventral surface 

 and 1 from distal portion of dorsal surface. Third segment approx- 

 imately two-thirds the length of second, bearing single naked setule 

 from distal portion of anterolateral surface, 4 from ventral surface 

 and 1 (not shown in figure) from distal portion of dorsal surface. 

 Fourth segment approximately equal in length to combined lengths 

 of second and third segments, bearing single naked setule from dis- 

 tal portion of anterolateral surface and 3 naked setules from ventral 

 surface. Fifth segment slightly more than two-thirds the length of 

 fourth, bearing single naked setule from distal portion of anterolateral 

 surface. Sixth segment slightly more than half the length of fifth, with 

 single naked setule from ventral surface. Seventh or terminal seg- 

 ment slightly less than twice the length of sixth, distal end rounded, 

 bearing approximately 13 naked setules and 1 slender, bluntly tipped 

 process. 



Antenna (figs. 2e, f) 3-segmented (although second segment ap- 

 pears separable into 2 parts), attached posterior and medial to anten- 

 nide base. First segment poorly developed, attached along broad 

 proximal surface to ventral cephalothoracic siu"face, with distinct 

 indentation distally that receives proximal portion of second segment 

 when segment flexed. Second segment 2-parted (note nature of 

 musculature in figs. 2e, f), proximal portion slightly shorter than 

 distal, poorly sclerotized in general although with well scldrotized 

 rib-shaped region providing place of attachment for muscles adducting 

 third segment. Distal portion of segment heavily sclerotized, with 

 clawlike projection of inner distal surface; proximal region with 

 heavily sclerotized surface for attachment of broad muscle adducting 

 third segment. Projection from inner distal surface of segment large, 

 terminating in sharp point with Avinglike lateral extensions forming 

 cup-shaped process for reception of distal end of claw-shaped third 

 segment. Third segment and projection of second forming chela, 

 segment with 2 minute accessoiy processes, appearing as spikelike 

 projections from proximal inner sm-face, adjacent to knoblike swelling. 



Mandible (fig. 2(j) indistinctlj^ 4-parted, first part approximately 

 one-foiu"th the length of appendage. Second part approximately 

 three-foiu-ths the length of first, third part equal to length of first 

 but more slender, with slight taper from proximal to distal regions. 



