222 bulletin: MUSEUM 01 COlfPAJUTTVI lOdLOOl 



ubeireular, narrower in the antero-poBteriof direction than b 

 larated \>\ rather more than twiee thru- diameter Antennae 

 abort. Setigerouf foveolae 2 + 2. 

 Collum leei strongly narrowed down the -nit- than, t. g., in 7'. rvbrc 



the anterior Bide of the lower, narrower, part being convex while the corre- 

 sponding caudal sale is ooneaye, further dorsad beeoming convex. 



Segmental sutures distinct throughout, not at all or scarcely wavy at level 

 of pore. Segments not at all constricted, proaonite and metaionite 1 >*in^ at 

 the same level. Both prozonites and metazonites smooth. 



In the gonopods the median plate the proximal arms are widely divergent, 

 mesally nearly horizontal, curving more dorsad of ectal distallv. each arm 

 extending out about the base of the gonopod to its ectal sale; median division 

 short, distallv rounded, curved forwards between the gonopods. 



Number of segments uncertain since the caudal end of the body is missing; 

 thirty segments are present. 



Diameter (male), 2.6 mm. 



638. Trigoniulus caeruleocinctus, sp. now 



Type.— M. C. Z. 4,779. Ternate (Thomas Barbour). 



The free part of prozonites are bluish, this color also extending a little 

 caudad of the segmental suture, the covered zone fulvous; remaining part of 

 metazonites ferruginous or somewhat reddish; in the caudal region an appear- 

 ance of darker spots along the pore-level. Legs light ferruginous. Anal 

 segment dark. 



Antennae short. Eyes small, about two and a half times their diameter 

 apart. Setigerous foveolae as usual. 



CoUum narrowed down side a little less than usual, the lower end well 

 rounded ventrally, the anterior margin convex, the posterior straight or for 

 a short distance slightly concave. 



Transverse sutures very distinct throughout; only slightly waved at level 

 of pore. Segments not constricted. Metazonites smooth; prozonites striate 

 laterally and beneath, above with some coarse puncta in front of the suture. 



Anal scutum about equalling valves, rounded behind, smooth. Valves 

 smooth, not marginate. 



The median plate of the male gonopods resembles that of T. eurabdotus, the 

 arms extending out widely about the bases of the gonopods as in that species; 

 but the distal part is much shorter, distally truncate and not bent caudad at 

 tip; the coxal plates of the anterior gonopods shorter, not surpassing the 

 median plate, truncate across distal ends. 



Diameter (male), 2.5 mm. 



639. Trigoniulus rubrocinctus, sp. now 

 Type. — M. C. Z. 4,777. Amboina (Thomas Barbour). 





