CYCLOPOIDEA. 10? g 



second and third in figure 39 and others. In some male antenna, 

 like figure 33, the articulations separating the last three joints are 

 obsolete, and are only indicated as regards position by the setse. 

 ^ In the course of the preceding remarks it has been shown, that the 

 right antenna, represented in 33, has the following relations in its 

 articulations to 32, the left antenna of the same male individual. 

 The joints are numbered from the apex. 



Joints 1, 2, 3, . . i n 32, correspond to joints 1, 2, 3, in 33. 



" 4, 5, . . . a « 4 u 



" 6,7, . . . « u 5 ' „ 



" 8, 9, 10, 11, and probably 12, " « q « 



In 33, the geniculating articulation is between joints 4 and 5 

 (joints five and six of 32) ; joints 5 and 6 of 33, constitute a kind of 

 hand, against which, joints 1 to 4, finger-like, may be flexed for 

 grasping. 



Again : the following are the relations of figures 37 and 38 : 



Joints 1, 2, 3, 4, 



. 



. in 37, correspond to joints 1, 2, 3, 4, in 38. 



" 5,6, 



. 



u 6j « 



" 7,8, . 



■ 



" " 6, " 



The geniculating articulation is here between the joints five and 

 6 of 38, or 6 and 7 of 37. The joints preceding the eighth in 37, are 

 somewhat enlarged, but are not coalescent. 



Seven is the smallest number of joints to which the right antenna 

 of a male is ever reduced. In that case, 



Joints 1, 2, 3, 



of the female 



correspond 



to joint 1 of male. 



" 4,5, 



ti 



tt 



2 « 



* 6,7, . 



a 



u 



3 " 



" 8,9,10,11,12, . 



a 



u 



4 « 



" 13 to penult inclusive, . 



a 



(I 



5, 6, « 



u Last or basal, 



i( 



11 



7 « 



From a glance at figures 21, 22, 23, 24, 37, 38, it is seen that the 

 antenna is marked off into parts by the positions of several long setse. 

 In figure 21, there are five of these long setae besides those about the 

 apex, and they thus divide the organ into six parts. In figure 23 

 (female), there are also jive; and 22 corresponds, except that there 



258 



