228 bulletin: museum of comparative zoology. 



G51. Phagostrophus hemmorhantes (Pocock). 



Spirobolus haemorrhantes Pocock, Ann. mag. nat. hist., 1893, ser. 6, 11 p. 141, 



pi. 9, fig. 12, 12a.i 

 Trigoniulus haemorrhantes Carl, Abhandl. Senckenb. gesellsch., 1912, 34, p. 



272, pi. 11, fig. 5-9.2 



Localities. — ^ Kei Islands: Great Kei, Langgur,- Kei-Dulah,^ ' ^ 

 Elat.2 



Arostrophus, gen. nov. 



Very close to Phagostrophus but mesal distal process of telopodite 

 of anterior gonopods much exceeding the outer part over which it 

 may bend ectad, and distally subclavately expanded, the distal end 

 oblique. Anterior median plate long, in length equalling or approach- 

 ing coxoid of anterior gonopods. 



Genotype. — A. mertoni (Carl). 



652. Arostrophus mertoni (Carl). 



Trigoniulus merloni Carl, Abhandl. Senckenb. gesellsch., 1912, 34, p. 273, pi. 

 11, fig. 10-13.1 



Localities. — Aru Islands : Dabo-Wangil forest, Wammer, Warda- 

 kau, Maikoor.^ 



653. Arostrophus klossi (Hirst). 

 Trigoniulus klossi Hirst, Trans. Zool. soc. London, 1914, 20, p. 332, fig. 19A.i 

 Locality. — Dutch New Guinea: Utakwa River.^ 



Zygostrophus, gen. nov. 



Differing from Spirostrophus, e. g. in the gonopods of the male. In 

 the anterior gonopods the anterior or coxal piece is elongate and nar- 

 rowed distally to a slender cornuate process, whereas the distal or 

 caudal division, also elongate, is distally broad and erect. In Spiro- 

 strophus the coxal plate is distally much broader, exceeding in width 

 the telopodite which, on the contrary, narrows to a slender cornuate 

 process which curves mesad. The median plate has the distal or 

 middle part much more elongate, not trapeziform, and distally acute. 



Genotype. — Z. ferruginopes, sp. nov. 



