20 MICHIGAN FISH COMMISSION— BULLETIN NO. 5. 



1883. C. perarmatus Cragin, p. 7, pi. I, figs. 9-18. 



1884. " phaleratus Herrick, p. 161, pi. R, figs. 6-10. 



1885. " " Daday, p. 252. 



1887. " " Herrick, p. 14, pi. VII, figs. 2, a-d. 



1888. " " Sostaric, p. 74, pi. II, figs. 21-22. 



1890. " " Lande, p. 75. pi. XX, figs. 126-136. 



1891. " " Sohmeil, p. 36. 



. 1891. " " Brady, p. 25, pi. IX, fig. 2. 



1891. " " Richard, p. 238, pi. VI, fig. 12. 



1892. " " Sohmeil, p. 170, pi. VIII, figs. 1-11. 



1893. " " Marsh, p. 216, pi. VI. figs. 6 and 7. 



I have found C. phaleratus in the collections from only three localities, — 

 Lake St. Clair, Intermediate Lake, and Twenty-sixth Lake. Very little 

 attention, however, was paid in the collections to the smaller lakes and 

 stagnant pools, and it is probable that in such localities it occurs generally 

 distributed through the State. 



Cyclops bicolor Sars. 

 Plate I, figs. 5-7. 



1863. C. bicolor Sars, p. 253. 



1880. " diaphanus Rehberg, p. 547. 



1884. " " Herrick, p. 160, pi. R, fig. 12. 



1885. " " Daday, p. 246. 



1885. " brevisetosus Daday, p. 255, pi. Ill, figs. 3, 5 and 10. 



1887. " diaphanus Herrick, p. 16, pi. VII, figs. 3 a-e. 



1888. " " Lande. p. 67, pi. 18, figs. 91-98. 

 1891. " bicolor Schmeil, p. 34. 



1891. " diaphanus Richard, p. 236, pi. VI, fig. 26. 



1892. " bicolor Schmeil, p. 118, pi. VI, figs. 6-13. 



1893. " " Marsh, p. 217. 



* 



I have found C. bicolor in the collections from three of the Michigan 

 lakes — Lake St. Clair, Intermediate Lake,* and South Lake on Beaver 

 Island. Doubtless more thorough collections from small lakes and stag- 

 nant pools would furnish other localities, though this species seems to be 

 nowhere very abundant. I have found, in a collection from a lake in 

 northern Wisconsin, an egg-bearing female with ten-jointed antennae, the 

 fourth and fifth joints of the eleven-jointed variety being united in one. 

 Unless this specimen should be considered a monstrosity, we would infer 

 that this species can reproduce in either the ten or eleven-jointed stage. 



I have added to the synonomy as previously given C. brevisetosus Daday. 

 I do not feel certain of the identity of the two forms, and yet it seems to 

 me probable that they are the same. I can not read the Hungarian, but 

 from the Latin synopsis and the figures I can not help thinking that 

 brevisetosus is the same as bicolor. The points of difference are the fol- 

 lowing. The furca of brevisetosus is longer than in typical bicolor. The 

 armature of the swimming feet does not correspond to Daday's description, 

 but the one figure which he gives of a swimming foot closely resembles 

 the structure of bicolor, and does not correspond to his own description. 

 The antennae of brevisetosus are ten-jointed, but they correspond exactly to 

 the structure of my ten-jointed specimen of bicolor. In all other respects 

 the descriptions agree. 



