chamberlin: west Indian chilopoda and diplopoda. 207 



Anal segment long. 



Anal scutum exceeded by the valves, which bulge convexly caudad 

 and are evenly convex, not margined or compressed, smooth. 

 Number of somites, forty-four. 

 Length, 45 mm.; width, 4 mm., nearly. 



141. MiCROSPiROBOLUS MARMORATUS Silvestri. 

 Bull. Amer. mus. nat. hist., 1908, 24, p. 10, f. VI (l-6).i 

 Habitat— ToRTO Rico: Utuado (W. M. Wheeler).^ 



142. MiCROSPiROBOLUS iNSULARis Silvestri. 

 Bull. Amer. mus. nat. hist., 1908, 24, p. 572, f. VII (l-2).i 



Habitat — ToRTO Rico: Utuado (W. M. Wheeler) .i 



143. MiCROSPiROBOLUS BELONANUS, sp. nOV. 



Tijpe— M. C. Z. 4,423. Paratypes— M. C. Z. 4,424, 4,425. Cuba : 

 Belona Oriente. C. T. Ramsden. 



Most of the somites are black above in a band at middle extending 

 from anterior nearly to caudal border but narrowing down the side 

 to level of pore; the caudal region at middle yellow but just above 

 pore on each side reddish; region immediately below pore dark, the 

 sides below this light, dominantly yellowish or dilute orange. First 

 tergite 3'ellow in a band across anterior border and in a narrower 

 band along caudal border. Head black above level of antennae, the 

 dark above eyes and in a smaller area mesoventrad of each eye in a 

 close network over a yellow gi'ound, elsewhere solid; below antennae 

 yellowish. 



Ocelli strongly developed; arranged in five transverse series, e. g., 

 8, 8, 7, 5, 4, a total of thirty-two. Antennae short, articles short, the 

 second and third longest, the sixth much thickened above a slender 

 base; sensory cones four. Labial pits 4 + 4. 



^ Collum or first tergite narrowed considerably at each side but much 

 less so than in Trigoniulus, the lower end strongly rounded; margined 

 laterallv and in front. 



