chamberlin: west Indian chilopoda and diplopoda. 185 



mesal margins light. Legs flavous. Antennae either the same or 

 darker and with distal end light. 



Sulcus evident only across vertex. Labral setiferous cones 2 + 2. 

 Antennae short, sixth joint expanded, sensory cones four. Ocelli 

 in each eye in five transverse series; thus, 10, 7, 7, 4, 2 (1). 



Collum with lateral margin straight, corners narrowly rounded. 

 Margined below and in front except dorsally. Above lower border 

 a very deep oblique sulcus. 



Pores beginning on somite six, very small, just caudad of suture. 

 Suture deep and distinct. Segments caudad of suture deeply striate 

 beneath, toward the pore becoming short and extending only a short 

 distance from the sutilre. The overlapped anterior region of somite 

 densely and very finely transversely striolate. 



The anal valves very strongly compressed, the mesal margins being 

 exceptionally elevated. Anal tergite triangularly produced caudally, 

 much exceeded by the valves. 



Number of somites, sixtv and near that number. 



Length up to 85 mm.; width to 5.1 mm. 



89b. Anethoporus gracilior, sp. nov. 



Type.— M. C. Z. 4,339. Paratiipes.— ^. C. Z. 4,340. Tobago: 

 near Richmond and King Bays. H. L. Clark. 



Readily distinguished from the other species in being very much 

 smaller and more slender. General color brown, becoming light ferru- 

 ginous in the anterior region. Each typical somite encircled by a dark 

 band in front of the caudal, overlapping border, this band embracing 

 an irregular light spot on each side, this spot with a network of dark 

 lines and breaking through the stripe anteriorly; anterior border 

 pale; the dark band extended farther forward on dorsum. Collum 

 with dark anterior and posterior transverse stripes as in A. clarki, 

 these within the borders and extended i-n the mid-dorsal region. Head 

 with a fine meshwork of dark lines above; a dark band between the 

 eyes, this band extended in a sagittate mark as in A. clarki, and also 

 with a dark line extending ventrad just mesad of each antennal socket; 

 the remaining portion of face light, much more so than in the other 

 species. The anal valves dark. The anal scutum also of solid dark 

 color excepting across proximal end where it shows a network of dark 

 lines over a paler background. 



Eyes smaller, with fewer ocelli in fewer series: c. g., 5, 6, 3, 2. 



