Vol. 33, pp. 37-40 July 24, 1920 



PROCEEDINGS 



OE THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SPIROBOLOID DIPLOPODS FROM 



AUSTRALIA. 



BY RALPH V. CHAMBERLIN. 



A diplopod collected in California on Stag-Horn Fern from 

 Australia and sent to me for identification by H. L. Sanford, 

 of the Federal Horticultural Board, appears to be an unde- 

 scribed species representative of a new genus. In the same 

 genus apparently falls a second undescribed species repre- 

 sented in the collections of the Museum of Comparative 

 Zoology by a female taken at Southerland, New South Wales, 

 Australia, by Prof. W. M. Wheeler. The new genus is nearest 

 to Spirobolellus, species of which occur commonly in the Aus- 

 tralian and East Indian regions. 



Strophobolus, gen. nov. 



In general resembling Spirobolellus but differing in the structure of the 

 male gonopods. The ventral plate of the anterior pair strongly trian- 

 gularly narrowed distad, the distal end subacutely rounded, not incised 

 as in Spirobolellus. The coxal pieces of anterior gonopods broad at base, 

 narrowing to middle and with distal part of nearly uniform width or a 

 little clavately widening, truncate. Telopodite narrowest at middle, 

 distally much broader than coxa beyond which it much extends, bent 

 mesad, the two members in contact at median line in genotype, the dis- 

 tal edges being long and straight. Posterior gonopod plate-like, narrow- 

 est at middle above which subclavate and at end truncate; two short, 

 spinous projections close together and just proximad of the distomesal 

 angle. Each segment with encircling furrows as in Spirobolellus, lacking 

 a true sulcus, the pore on metazonal region. Clypeal foveolae 4 + 4 or 

 5 + 5. 



Genotype. — Strophobolus immigrans, sp. nov. 



7— Proc. Biol. Soc. Wash., Vol. 33, 1920. (37) 



