246 PROCEEDINGS OF THE ACADEMY OF NATURAL SCIENCES. [1899. 



To 2^'gonyx Selys, ida Selys (type of the genus) and iris Selys. 



In order that the structure of these species may be compared 

 most readily with that of their American analogues, the following 

 tabular form, used on pages 303 and 304 of my Macrotheynis paper, 

 is also employed here : — 



(5* 9 of onespfcies, but the spining of the legs is considerably different." 

 A difference in the same parts of the two sexes is found in Macrotliemis. 



Ps. luxuriosa Karscb was later stated by him to be a synonym of Zygonyx 

 ida Selys (Ent. Nach., xxi, p. 203). Tyriohapta Kirby, placed by its 

 author (Trans. Zool. Sec. Lond., xii, p. 262) next to Jfacrothemis, has, I 

 believe, nothing to do with the genera here considered. 



