192 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Spirobolus callipus is described from two specimens, male and female. 

 This species, although agreeing with the Mazatlan species in many 

 particular points, possesses a copulation foot which is very different. 



3. Spirobolus bahamensis, sp. nov. 



Diagnosis. — Eelated to Spirobolus multiform Karsch, but larger and 

 more robust; segments 48; above blackish, beneath yellow. 



Habitat. — San Salvador, Bahamas; U. S. Fish Commission. 



Type.— Male, TJ. S. Nat. Museum. 



Description. — Male. Above shining black-brown, slightly greenish 

 anteriorly; beneath yellowish, the yellow extending up along posterior 

 border of segments, the black along anterior; vertex greenish ; anten- 

 nae dark, legs paler. Eobust, anterior segments attenuated. Vertex 

 smooth, sulcus subcontinuous with clypeal; clypeus not deeply exised, 

 foveolae 5+5. Antenna) subclavate, reaching second segment. Ocelli 

 48, in 7 series, patch subtriangular. Segments visibly divided below 

 repugnatorial pores, above which the dividing line fades out; smooth, 

 sparsely and lightly punctate ; obliquely striate beneath. Sides of first 

 segment narrowed, subacute, a marginal sulcus. Eepugnatorial pore 

 moderate, opening on anterior part, touching sulcus, which is bent. 

 Anal segment slightly pointed, not passing valves ; anal valves mar- 

 gined, punctate; anal scale rounded, transverse. Legs moderate, 

 scarcely extending beyond sides of body. Segments 48. 



Male: Coxae of third and fourth pairs of legs slightly produced, the lat- 

 ter longer and more pointed; coxae of fifth pair much longer, flattened 

 and curved over the coxae of sixth pair which are shorter and blunt; 

 coxae of seventh pair produced into large and heavy lobes ; tarsi of legs 

 without a pad; sixth and seventh segments swollen beneath. Length, 

 70 mm ; width, 8.5 mm . 



Described from an adult male. In the pattern of coloration this 

 species shows a great variation from the others of the genus. No 

 doubt when it is compared carefully with specimens of multiform not 

 much resemblance will be found between the two. 



3. Spiroboliis surinamensis, sp. nov. 



Diagnosis. — Eelated to Spirobolus dominicce Pocock. Segments with- 

 out a transverse sulcus, their surface with numerous horseshoe-like 

 depressions. 



Type. — Male and female, TJ. S. Nat. Museum. 



Habitat. — Paramaribo, Surin am. 



Description. — Eeddish brown, antennae, legs and posterior border of 

 segments brighter. Moderately slender, anterior segments slightly 

 attenuated; vertex rough, sulcus short, ending in a slight depression; 

 clypeus rather deeply excised, sulcus deep, foveolae 2+2, distant. An- 

 tennae short and thick, reaching past first segment. Ocelli 35-45, in 

 6 or 7 series; patch subtriangular. Segments not distinctly divided, 



