166 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



thoracic area extending posteriorly past posterior ends of lateral regions ; 

 posterior margin convex, protruding slightly at junction of fourth 

 thoracic leg-bearing segment. Cephalothoracic grooves distinct; 

 major grooves in shape of irregular H with anterior and posterior 

 end flared. Cross groove in middle of cephalothorax continuous 

 with posterior longitudinal grooves, broadly curved anteriorly, apex 

 with additional slight, anteriorly directed curve. Anterior longi- 

 tudinal grooves extending anteriorly and laterally, terminating 

 blindly posterior to eyes, in region of lateral margin. Light median 

 groove present, extending from apex of cross groove posteriorly to 

 posterior margin of cephalothorax. Eyes small, contiguous on 

 median longitudinal axis of body, located in anterior fourth of 

 cephalothorax between pair of indistinct, longitudinal grooves (fig. 8a). 



Cephalothorax of immatm-e female ovoid, frontal region similar to 

 that of male, lunules slightly smaller, not extending on ventral surface 

 past division between frontal region and cephalothorax. Posterior 

 sinuses as in male. Median cephalothoracic area extending poste- 

 riorly slightly past lateral areas, not protruding at junction of fourth 

 thoracic leg-bearing segment. Cross groove connecting longitudinal 

 cephalothoracic grooves evenly curved, without slight anterior median 

 curve present in male. Character of remaining cephalothoracic 

 grooves as in male. Eyes slightly larger than those of male; grooves 

 bounding eyes in male terminating anterior to eyes in immature 

 female (fig. 86). 



Division between cephalothorax and fourth thoracic leg-bearing 

 segment distinct in male and immature female. Fourth thoracic 

 leg-bearing segment wider anteriorly, at region of fourth thoracic leg 

 attachment, than posteriorly. Fourth thoracic leg-bearing segment 

 fused to genital segment, posterior lateral margins lobed, constrictions 

 between lobes appearing as fine, discontinuous lines; lobed condition 

 more distinct in male than in immature female. 



Genital segment of male small, ovoid, posterior margin slightly 

 convex. Fifth legs appearing as two minute, plumose setae from 

 posterior ventral lateral surface. Sixth legs present as three minute, 

 plumose setae from slight protrusion on posterior ventral surface 

 (fig. 8c). 



Genital segment of immatm'e female irregular, longer than wide; 

 posterior margin irregular. Fifth legs visible on posterior lateral 

 margin as group of three small, plumose setae, two projecting from 

 single, slight protrusion of segment, third from second slight pro- 

 trusion just anterior to first (fig. 8d). 



Abdomen of male two-segmented, attached to posterior surface of 

 genital segment. First segment short, bell-shaped, second segment 



