204 bulletin: museum of comparative zoology. 



and the shorter one more blade-like, and bearing the seminiferous duct 

 which in Dinematocricus opens between the two branches. 



Antennae short; sensory cones four. 



Collum broad and rounded laterally. 



Pores in front of suture; beginning on sixth somite. Scobina 

 present. 



Genotype. — N. toroanus, sp. nov. 



137. Nesobolus toroanus, sp. nov. 



Type. — M. C. Z. 4,412. Cuba: Guantanamo. C. T. Ramsden. 

 Paratijpes.— M. C. Z. 4,413, 4,420-^,422. Cuba: Mt. Toro, Nim- 

 filas, Ramona el Mono, San Felipe, Los Hondones, Belona. C. T. 

 Ramsden. 



Color behind suture on a typical somite is dark brown, the color 

 near and below the level of the pore is lighter from the inclusion of 

 aggregations of numerous light dots as seen under the lens, a narrow 

 marginal light stripe also often evident across the dorsum. Collum 

 with a blackish stripe across anterior border and a narrower one along 

 the caudal, the median area of the plate being covered with a network 

 of dark lines. Anal scutum and valves black, the former narrowly 

 margined with flavous or light ferruginous and embracing minute light 

 dots proximally. Legs flavous or light ferruginous. 



Eyes in a subcircular to somewhat triangular area, about twenty-five 

 in number in five series. 



Collum margined laterally and around and just above the anterior 

 corner. Second tergite extending below it but more or less flattened 

 beneath. Suture of segments strongly marked throughout, single, 

 gently sinuate at level of pore. 



Anal valves much exceeding the last tergite; strongly convex, not 

 compressed, nor margined. 



In this species the median plate of the male gonopods is inversely 

 T-shaped, the median piece being long, slender, and parallel; sides 

 distally subacutely narrowed, and in the type-species constricted 

 proximally; the paired outer (anterior) gonopods are almost wholly 

 exposed in front view. The posterior (inner) gonopods are slender, 

 and distally bifurcate with the prongs long and slender, the upper 

 seminiferous one short and slenderly blade-like, distally curved and 

 subacute, the other very much longer and running out to a fine point. 



Number of segments, forty-seven to forty-nine. 



Length up to about 43 mm.; width, to 3 mm. 



