172 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Measurements. — Length from anterior end of body to posterior 

 end of caudal rami, excluding setae, 2.94 mm. Greatest length of 

 cephalothorax, including frontal region, 1.75 mm.; greatest width, 

 excluding marginal flange, 1.75 mm. Greatest length of genital seg- 

 ment 0.90 mm.; greatest width 1.11 mm. Greatest length of abdo- 

 men 0.25 mm. 



Description. — Body with light brown background coloration in 

 alcohol, mottled with yellow and with few scattered red and blue 

 pigment spots over cephalothorax, fourth thoracic leg-bearing seg- 

 ment, genital and abdominal segments. Eyes reddish. 



Cephalothorax orbicular; frontal region well developed, with narrow 

 anterior marginal flange. Lunules distinct, extending to division 

 between frontal region and cephalothorax (fig. 10c). Groove between 

 frontal region and cephalothorax distinct, continuous, curving 

 anteriorly in smooth, flat curve in middle. Lateral margins of 

 cephalothorax with membranous flange. Posterior sinuses distinct, 

 U-shaped. Median cephalothoracic area extending posteriorly slightly 

 past posterior extensions of lateral regions; posterior margin of 

 area flattened. Lateral corners of protruding median cephalo- 

 thoracic area rounded, lateral margins continuous with inner margin 

 of posterior sinuses. Major cephalothoracic grooves distinct, forming 

 irregular H ; cross groove continuous with posterior longitudinal 

 grooves. Middle of cross groove forming flat anteriorly directed 

 point though apex with slight depression. Posterior longitudinal 

 grooves slightly convex; anterior longitudinal grooves extending 

 anteriorly and laterally from junction with cross and posterior longi- 

 tudinal grooves, terminating blindly posterior to eyes, medial to lateral 

 margin. Lateral strengthening regions extending laterally from origin 

 just anterior to junction of longitudinal and cross grooves, curving 

 posteriorly and tapering out in region of posterior lateral margins. 

 Two minor grooves present, extending posteriorly from either side 

 of anterior curvature of groove between frontal region and cephalo- 

 thorax, terminating just anterior to eyes. Light median longitudinal 

 groove present extending posteriorly from slight median depression 

 of major cross groove to posterior margin of thoracic area. Eyes 

 small, contiguous on median longitudinal axis of body in anterior 

 fourth of cephalothorax (fig. 10a). 



Fourth thoracic leg-bearing segment, genital segment, and abdomen 

 fused. Region of fourth thoracic leg-bearing segment tapered out- 

 ward sharply from junction of cephalothorax to region of fourth 

 thoracic leg attachment, adjacent to anterior lateral surface of genital 

 segment. Fourth thoracic leg-bearing segment tapered inward 

 slightly from widest point to beginning of genital segment. Division 

 between fourth thoracic leg-bearing segment and genital segment 



