62 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



approximately 1% times the length of second, tapered from broad 

 proximal to narrow distal end, bearing approximately 22 lightly 

 plumose setae from anterior ventral and distal ventral surfaces. 

 Second segment elongate, rod shaped, with naked setule from distal 

 posterior surface, approximately 7 from distal surface. Female an- 

 tenna (fig. 236) 3-segmented, situated posterior and medial to anten- 

 nule base. First segment sub triangular, small, with roughened, 

 triangular projection from proximal posterior surface. Second seg- 

 ment almost twice the size of first, with small, lappet-Hke anterior 

 distal projection. Third segment indistinctly separable from clawlike 

 terminal process, with small, knoblike projection proximally, projec- 

 tion bearing setule-like accessory process ; second setule-like accessory 

 process present at junction of segment and terminal process. Male 

 antenna (fig. 23c) 3-segmented, first 2 segments similar to those of 

 female, third with larger accessory processes and bifurcate terminal 

 process. 



Female and male mandible (fig. 23 e) indistinctly 3-partied, rodlike; thu'd 

 part flattened, distal inner surface mth 12 denticulations. Small, 

 bilobed cuticular flap present in female adjacent to mandible base. 

 Postantennal process of figured female (fig. 23d) situated lateral and 

 slightly posterior to base of antenna, consisting of platelike region of 

 heavy sclerotization bearing large spine on lateral posterior surface, 

 smaller spine on inner posterior surface, and bifurcate spinous pro- 

 jection on posterior inner surface. Platelike region also bearing 2 

 nodules on medial surface, each with several hairlike projections; 

 additional nodule present just posterior to process, \\^th several hair- 

 like processes. Other female specimens with, condition similar to that 

 of male or with various combinations of spines (see discussion). 

 Small, spinelike projection present adjacent to anterior inner surface 

 of postantennal process, arising from edge of depression associated 

 with base of antenna. Male postantennal process (fig. 23c) similar to 

 that of figured female although lacking smaller of 2 single spinelike 

 projections. Female postoral process (fig. 2Se) bifurcate, each ramus 

 spinelike; additional, minute, sharply pointed projection present 

 just lateral to bifurcation. Male postoral process (fig. 23/) spinelike, 

 not bifurcate as in female. Possible remnant of postoral adhesion 

 pad present in female as minute, oblong protrusion just posterior to 

 postoral process and medial to maxilla base. Female maxillule 

 (fig. 23e) nodular, bearing single setule and cluster of hairlike processes. 

 Male maxillule (fig. 23/) nodular, with 2 or 3 setules. Female and 

 male maxilla (fig. 23g) 2-segmented, first segment approximately 

 three-fourths the length of second, slender, width varying little 

 throughout length. Second segment narrow proximally and distally, 

 swollen medially, with indistinct membrane on medial inner surface; 



