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PROCEEDINGS OF THE NATIONAL MUSEUM 



Allotype: Greatest length, excluding caudal setae and fifth legs, 

 4.88 mm. Greatest length of cephalothorax, including frontal region, 

 3.30 mm.; greatest width, excluding marginal flanges, 2.78 mm. Great- 

 est length of genital segment, excluding fifth and sixth legs, 0.83 mm.; 

 greatest width 0.98 mm. Greatest length of abdomen 0.30 mm. 

 Greatest length of fifth leg 1.08 mm. Greatest length of fifth-leg 

 terminal process 0.07 mm. Greatest length of sixth leg 0.29 mm. 

 Greatest length of sixth-leg terminal processes 0.18 mm. 



For measurements of all specimens, see tables 7 and 8. 



Description. — Adult: Body large, female approximately 6-7 mm. 

 in length, excluding setae, male approximately 4.7-5.3 mm. in length, 

 excluding setae. Anterior lateral cephalo thoracic margins forming 

 sharply-angled, posteriorly-directed protrusion. Free fourth pediger- 

 ous segment slightly covered by posteriorly-projecting median cephalo- 

 thoracic region, dorsal cuticle appearing as indistinct, plateHke struc- 

 ture that does not overlap genital segment. Division between fourth 

 pedigerous and genital segments distinct. Genital segment of female 

 large, lateral posterior surfaces extending posteriorly as distinct, 

 lobate projections. Female and male fifth legs long, heavily sclero- 

 tized, extending posteriorly well past posterior end of caudal rami 

 but not past caudal setae, terminating in blunt, scoop-shaped tip 

 bearing plumose setule. Sixth legs of male knob-shaped, with two 

 terminal plumose setules. 



First antennular segment with small, heavily sclerotized, shelflike 

 extension of posterior distal surface. Male antenna with terminal 



> sss: A nodule bearing three hairlLke processes. 



