St\i(lins ciw nini'ini' Osli'iiroils .'!7.) 



tlioy are Kitiiated. This joint luis not tlie distal-posterior cutting edge that is characteristic 

 of most genera of the sub-family Ci/pridininae. The little end joint is moderately strongly 

 chitinized and is furnished with a rather large number of bristles (see fig. 14 of Ph. 

 (Ph.) glohosa). With regard to these bristles the species investigated by me showed only slight 

 variation. One group, consisting of three to five bristles in the species investigated by me, 

 foi-ms a transverse row somewhat posteriorly on the outside of the joint; these bristles are of 

 moderate length and strength and decrease somewhat in length the more anteriorly they are 

 situated. The other bristles are situated more or less distinctly along the distal edge of the joint 

 and are rather different in length and strength. One group of these is situated distally inside 

 the other bristles; on the species investigated by me this group, like the former one, numbers 

 from three to five bristles; these are comparatively weak, the posterior ones are moderately long, 

 the anterior ones in most cases rather considerably shorter. Besides these bristles I observed 

 on the species investigated by me five more bristles (only on one specimen of Ph. (Ph.) Lilljehorgi 

 were six observed on the maxilla of one side). The three middle ones of these are very powerful 

 and of moderate length, the anterior one being somewhat shorter than the two others, and weakly 

 curved. The bristle that is situated in front of these three is somewhat weaker and in most cases 

 somewhat shorter than the anterior of them and is moderately strongly pectinated. The bristle 

 situated behind these three is in most cases somewhat shorter than the posterior one of them, 

 of moderate strength and moderately strongly pectinated. Pilosity: The first endopodite joint 

 has along its anterior side rather numerous transverse rows of short fine hairs. (The end o- 

 p o (1 i t e and the exopodite are so similar in appearance within this genus that it did 

 not seem necessary to me to reproduce them for more than one species: Ph. (Scl.) AffeUofi; 

 the end joint is also reproduced for Ph. (Ph.) glohosa.) 



Male: — This is of the same fundamental type as that of the female, but it seems 

 certain, however, that it cannot be used as a masticatory organ. It is somewhat smaller than 

 that of the female, and is only weakly jointed; its muscular system is almost completely reduced 

 and all its chitinous parts are soft, thin and hyaline. The bristles seem to be the same or almost 

 the same as on the female maxilla; the bristles that have long secondary bristles in the female 

 maxiUa are in the males provided with abundant long, soft hairs along the greater part of their 

 length; similar hairs seem, however, to occur, though more sparsely, also on bristles that have 

 short hairs in the female; distal secondary teeth are quite absent from the bristles. Pilosity: 

 The hairs on the first endopodite joint are more abundantly developed; on tlie j^rotopodite 

 there is a ,,Hautsaum" with hairs similar to that found on the female maxilla. 



Fifth limb:* — This has marked sexual dimorphism. 



Female: — All the species investigated by me showed a very close agreement with 

 regard to this limb. (Because of this I did not think it necessary to reproduce it for more than 

 one species: Ph. (Scl.) AffeUofi; a detailed description is given under the first species. Ph. 

 (Ph.) glohosa.) P r o t o p o d i t e: In the species investigated by me the first endite constantly 

 has six bristles, of which the four middle ones arc situated in a row, the anterior one and the 



* In lh<; descriptions this limb is always, for practical reasons, tlioiiirhl nt :is pointing; straislil iintwai'ds. wlici'i'as 

 in llii' n,ilni;il position of n'sl it points ol)li(pirly onlwnrds nnd liai kwnrds. 



