12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 109 



Tergites of segments 2 and 3 not of full width or length. Caudo- 

 lateral corners of paranota rather sharply rounded. Paranotal 

 sweUmgs present. 



Tergite of segment 4 of normal width but slightly shorter than 

 succeeding ones. Paranota and paranotal swellings like those of 

 segements 2 and 3. 



Tergites of segments 5-16 similar to each other in both length and 

 width. Caudolateral corners of paranota becoming increasingly pro- 

 duced caudad, this condition marked at level of 9th segment. Poste- 

 rior edges of paranota of segment 13 and aU succeeding segments 

 noticeably directed caudad. Paranotal swellings strong. 



Paranota of segments 17 and 18 rather sharply triangular. Para- 

 notal swellings very strong. 



Anal segment sub triangular in dorsel aspect, apex truncate; two 

 small subterminal lateral tubercles present. 



Anal valves inflated, unsculptured, with prominent mesial ridges; 

 the usual setiferous tubercles present. 



Preanal scale variable in shape, sometimes subtriangular with the 

 two lateral tubercles well below level of terminal protuberance and 

 base of scale almost straight, sometimes subeUipsoidal with the two 

 lateral tubercles on nearly same level as terminal protuberance and 

 base of scale strongl}'^ curved. 



Vertigial sulcus of head distinct, ending little above upper level of 

 antennal sockets. Occipital foveolae 2+2, moderately distinct; 

 antennal foveolae 1 + 1, very indistinct; clypeal foveolae 1 + 1, very 

 distinct. Antennal article 2 the longest, 3-6 subequal; articles 1-4 

 only sparsely hirsute, 5-6 heavilj^ hirsute; antennal sensory cones 4. 

 Mouthparts typical of the family Xystodesmidae. 



Sternum of 3d pair of legs with prominent pair of somewhat fused 

 processes; sterna of 4th and 5th legs each with a pair of small, separate 

 processes; sternum of 6th legs smooth. 



Second pair of legs with usually clyindrical, distally truncate, 

 seminal lobes. Pregenital limbs heavUy hirsute, without spines on 

 prefemora. 



Coxae and prefemora of postgenital legs small, their combined 

 length subequal to that of 3d podomere; 4th and 5th podomeres 

 shorter than 3d, subequal; 6th podomere slightly longer than 4th 

 and 5th. Strong, gently curved claws present. Prefemora of post- 

 genital legs heavily armed. Coxal armature weak to moderate. 



Gonopod aperture ovoid, cephalic side slightly indented, caudal 

 margin with prominent flange. Male gonopods small (about 1 .58-1 .74 

 mm. in telopodite arc length and 0.90-1.04 mm. in arc width); simple 

 in form; curved mesiad, distal end bent very sharply dorsad; tip 



