NOTES UPON A COLLECTION OF MYRIAPODS BELONGING TO THE 

 U. S. NATIONAL MUSEUM. 



BY CHARLES H. BOLLMAN. 



The following notes are a continuation of the paper which appeared 

 in the Proceedings of the Museum for 1888 (pp. 343-350). In this part 

 is given an account of the foreign material in the same collection. 



The following is a key to the seven species of Spirobolus mentioned 

 in this paper : 



a. Scobina absent (subgenus Spirobolus). 



b. Repugnatorial pore opening on posterior division of segments Gracilis. — 1. 



bb. Repugnatorial pore opening on anterior division of segments, 

 c. Segments divided by a transverse sulcus. 

 d. Sulcus obliterated above ; clypeal foveobe 34-3 or 3-f-4 . . Callipus. — 2. 



dd. Sulcus literated above ; clypeal foveolae 5+5 Bahamensis. — 3. 



cc. Segments not divided by a distinct transverse sulcus ; foveolae 2-J-2. 



Surinamensis. — 4. 

 aa. Scobina present (subgenus ithinocrinus) . 



e. Anal segment produced into a large, flat mucro. 

 /. Anterior part of segments without a transverse sulcus ; segments 51-56 



Caudatus. — 5. 

 ff. Anterior part of segments with a transverse sulcus ; segments 46-48. 



Zonipus. — 6. 

 ee. Anal segments produced into a long, sharp mucro Dugesi. — 7. 



1. Spirobolus gracilis, sp. nov. 



Diagnosis. — Related to Spirobolus brandti Karsch, but the dorsum of 

 each segment smooth and sparsely punctate; anterior part of segments 

 showing concentric striae beneath ; first segment with subacute sides 

 which have three striae. 



Habitat. — Paramaribo, Surinam. 



Type. — Female, U. S. Nat. Museum. 



Description. — Female. Greenish black, posterior border of segments 

 brownish ; legs and antennae dark. Slender, anterior segments scarcely 

 attenuated. Yertex smooth, sulcus short and shallow; a depression 

 between eyes; clypeus rather rough, not deeply excised, foveolse 2+2, 

 close together, above a transverse line. Antennae short and thick, 

 reaching second segment. Ocelli 43-45, the 6 rows forming a suboval 

 patch. Segments smooth, sparsely punctate; posterior part with ob- 

 lique striae beneath; anterior part showing several concentric striae 

 beneath, but which above disappear under the preceding segment. 

 Sides of first segment subacute, with 3 striae ; anterior border slightly 

 excised. Repugnatorial pore moderate, placed about on the anterior 

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