204 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



leg-bearing segment and genital segment 0.59 mm.; greatest width of 

 genital segment 1.07 mm.; length of genital segment spines 0.66 mm. 



Description.- — ^Body of female with large, yellowish blotches in 

 irregular pattern in alcohol ; eye spots yellowish orange. Body of male 

 yellowish in alcohol, with red spots scattered over surface; eyes as in 

 female, 



Cephalothorax of holotype female specimen ovoid, frontal region 

 small, with thin, membranous flange along anterior margin; frontal 

 region separated from cephalothorax by distinct, trilobed groove, 

 median lobe much larger than lateral lobes. Lateral margins of 

 cephalothorax with narrow, membranous flange. Posterior sinuses 

 distinct, U-shaped, with two small, membranous flaps attached along 

 lateral and anterior margins, one extending ventrally, other dorsally. 

 Inner margin of posterior sinuses continuous with posterior lateral and 

 posterior margins of median cephalothoracic region. Median cephalo- 

 thoracic region extending slightly posterior to posterior lateral exten- 

 sions of lateral cephalothoracic regions; middle of posterior margin 

 slightly concave. Dorsal grooves of cephalothorax distinct, H -shaped ; 

 anterior portion of grooves terminating blindly posterior to eyes, 

 cross groove, in middle of cephalothorax, curving anteriorly, not as 

 distinct as longitudinal grooves. Lateral strengthening regions 

 extending from just anterior to junction of cross and longitudinal 

 grooves laterally and posteriorly, terminating just inside lateral 

 margins of cephalothorax. Eyes small, situated in anterior third of 

 cephalothorax, inner margins touching on median longitudinal axis 

 of body (fig. 17a). 



Fourth thoracic leg-bearing segment and genital segment fused in 

 female, covered by single, dorsal plate. Fourth thoracic leg-bearing 

 segment more distinct than in D. curtus, genital segment not be- 

 ginning under posterior portion of cephalothorax as in D. curtus but 

 slightly behind it. Genital segment expanded, lateral areas broadly 

 rounded, middle of posterior margin concave, not convex as in D. 

 curtus, posterior lateral margins without single, small, pointed pro- 

 trusion present in D. curtus (figs. 17 c,d). Fifth legs visible as long, 

 acuminate, unjointed, spinelike projections from ventral posterior 

 lateral surface of genital segment. Spinelike projection with three 

 small, plumose setules, one on proximal lateral surface, one on ventral 

 medial surface, one on ventral distal surface (figs. 17 c,d). 



Abdomen of female one-segmented, attached to posterior surface 

 of genital segment, not ventral surface as in D. curtus. Width of 

 abdomen approximately same as length. Abdomen without pos- 

 terior lateral extensions found in D. curtus (figs. 17 c,d). 



Cephalothorax of allotype male similar to that of female except 

 frontal region with flatter anterior margin. Region of third thoracic 



