66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



From the descriptions of /. jamaicensis and /. caraibicus the fol- 

 lowing inferences are possible : /. peduncularis differs from both in 

 having stalked pores, the first of which is adjacent to the front margin 



Fig. 2i~- — Inodcsiiuis peduncularis. First 5 segments, lateral view. 



of segment 5 ; it differs further from /. caraibicus, as shown in Sil- 

 vestri's illustration, in the shape of the second segment, which overlaps 

 the posterior-lateral part of the first segment and which also has a 

 produced lobe or tubercle on the posterior angle (fig. 32). 



Family CYRTODESMIDAE 

 CYLIOCYRTUS OCREATUS, n. sp. 



Plate 3, fig. 7 



About 15 specimens were collected in the Maracas Valley and the 

 Arena Forest, Trinidad, February 13, 1932. 



Diagnosis. — Apparently differing from C. asper (Peters) in having 

 the first segment entirely concealed from the side by the expanded 

 sides of segment 2 ; and there are no large tubercles on the dorsum 

 of the segments as shown in Cook's drawing." It is possible that 

 the radiating lines seen on the lateral lobes of segment 2 in this species 

 also are present in C. asper, in which case they are a generic char- 

 acter ; otherwise they constitute a specific difference. 



Description. — Length 10 mm, width 2 mm. 



Living aniinals dull black ; the anterior subsegments black pos- 

 teriorly, white anteriorly, the dividing line very definite, biarcuate. 

 Head black to between the antennae, which, with the anterior part of 

 the head, are white. Legs, anal valves, and preanal scale also white. 



Head with the vertex eroded-granular, not hispid ; two ridges above 

 the antennae and most prominent near them ; vertex and front joined 

 at the same level ; antennae strongly geniculate at the fourth joint 

 (%. 33,a)- 

 "Proc. U.S. Nat. Mus., vol. 21. pp. 451-468, 1898. 



