1911.] NATURAL SCIENCES OP PHILADELPHIA. 335 



Metathorax equal to three-fourths the mesothoracic length; median 

 segment transverse, cephalic margin arcuate. Abdomen with the 

 median segments very strongly longitudinal; anal segment but 

 slightly longer than the preceding abdominal segment, meso-carinate, 

 caudal margin acute-angulate ; supra-anal plate small, tapering 

 subdigitiform, horizontal; cerci about twice the length of the anal 

 segment, subcompressed, terete; operculum elongate lanceolate, 

 falling but little short of the tips of the cerci, carinate proximo-laterad ; 

 seventh ventral abdominal segment slightly produced distad into a 

 pair of divergent acute triangular looes, the interspace being V-shaped 

 emarginate, surface of segment not carinate mesad. Cephalic femora 

 slightly exceeding the mesothoracic and twice the prothoracic length; 

 tibiae exceeding the femora by about the prothoracic length. Median 

 femora unarmed and non-lobate, nearly equal to the pro- and meso" 

 thoracic length; tibiae slightly exceeding the femora. Caudal femora 

 very slightly shorter than the median pair ; tibiae exceeding the femora 

 by more than the prothoracic length. 



Natural color destroyed by immersion in spirits. Present coloration 

 pale yellowish. 



Measurements. 



Length of body, 79.0 mm 



Length of prothorax, 2.5 



Length of mesothor ax, 16.0 



Length of metathorax (inch med. segm.), 12.5 



Length of cephalic femur, 22 2 



Length of median femur, 18.5 



Length of caudal femur, 18.2 



Length of operculum, 9.8 



The type is the only representative of the species seen by us. 



PHIBALOSOMINJv 

 ISCHNOPODA Grandidier. 

 Ischnopoda reyi Grandidier. 



1869. Ischnopoda reyi Grandidier, Revue et Magasin de Zoolog., 2me ser., 

 XXI, p. 292. [Quilimane, Portuguese East Africa.] 



German East Africa. Two females. 



