102 lULLKTIN 16, rXITED STATES NATIONAL Ml'SElM. 



Spinthohts caUipuH is descrihetl Ciuia two speciiiKMis, malt' ;iinl ftMiiah'. 

 This spiM'ies, iiltlMni^h aj^rccinji' \\'\i\\ Ww .Mazatlaii siMM'ies in many 

 purticiilur points, possesses » copulation foot which is very ditlerent. 



3. SpiroboluB bahameusis, s|i. imv. 



Diagnosis. — Related t^» Spirohohis multiforns Karscli, hut larjjcr and 

 more robust; segments 18; above blackish, beneath ycMow. 



JIahiUtt. — San Sahador, lialianias; U. S. Fish Commission. 



Type. — Male, V . S. Nat. Museum. 



Description. — Male. A))ov«^ shining black-biown, slightly greenish 

 anteriorly; beneath yellow ish, the yellow extending up along jjosterior 

 border of segments, the black along anteri«>r; vertex greenish; anten- 

 nie dark, legs i)aler. Robust, anterior segments attenuated. Vertex 

 smooth, sidcus subcontinuous with <'lyi)eal; clypeus not deep'y exised, 

 foveohe ")-[-,■». Antenna', subclavate, reaching second segment. Ocelli 

 48, in 7 series, ])atcli subtriangular. Segments visibly divided below 

 repugnatorial i»ores, abo\e which the divi«ling line fades out; smooth, 

 sparsely and lightly imnctate;obli»iuely striate beneath. Sides of Mrst 

 segment narrowed, subacute, a marginal sulcus. Repugnatorial ])ore 

 moderate, opening on anterior i)art, touching sulcus, which is bent. 

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

 gined, imnctate; anal scale rounded, transverse. L«'gs moderate, 

 scarcely extending beyond sides of body. Segments 4S. 



Male: Coxa' of third and fourth pairs of legs slightly produced, thelat- 

 ter longer and more pointed; coxa' of fifth pair nnich longer, Hattened 

 and curved over the (^oxa? of sixth pair which are shorter and blunt; 

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

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

 70"""; width, 8.5°"". 



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 multiforus ni>t 

 much resemblance will be found between the two. 



3. Spirobolus surinameusis, sp. iiov. 



Diagnosis. — Related to Spifohoins dominica' Pocock. Segments with- 

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

 depressions. 



Type. — INfale and female, U. S. Nat. Museum. , 



Habitat. — Paramaribo, Surinam. 



Description. — Reddish brown, antennie, 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, foveohe 2+2, distant. An- 

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

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



