250 PROCEEDINGS OF THE ACADEMY OF [1899. 



Bemarks on the ptrceding table — Characters 14 and 15, which 

 have no corres|x>nding entries in the table in the Maerothemis paper 

 quoted, show some differences of these species from the " Common 

 characters of the Genera" Dythemis, etc., listed on p. 301, I.e. 

 Ill all other re-spects that list of Common Characters is to be under- 

 stood to apply to the species here tabulated, although occasional indi- 

 vidual variations exist. Thus, I noted that the last antenodal on 

 one front wing of one female Z. ida was continued to the median 

 vein; Baron de Selys has a similar note for Z. iris; Mr. Kirby 

 mentions the existence of one hypertrigonal (supratri angular) 

 vein in one wing of one male Pseudomacromia torrida. 

 ScMzonyx. 



The data given for S. luctifera in the table are based on per- 

 sonal examination at various times of seven males, two females. 

 9* is crossed in one wing of two males, 11 is 1-2-celled in 

 three males, 12 sometimes begins with three cells or is inter- 

 rupted by three cells, 13 in some begins Avith three cells. For 

 bibliography of luctifera see Proc. Acad. Nat. Set. Phila., 1898, 

 p. 146. Schizonyx differs from Pseudomacromia and Zygonyx not 

 only in some of the characters tabulated, but also in having a 

 slight enlargement on the posterior margin of the eye, such as is 

 found in the Corduliure, and in its pterostigma being shorter on 

 the hind wings than on the fi'ont wings, 

 Pseudomacromia torrida Kirby. 



The data given in the table and those which follow on variations 

 are derived entirely from JNIr. Kirby' s descriptions and figure 

 {Trans. Zool. Soc. Loud., xii, p. 262, 299, 840, pi. lii, f. 7). 

 As Ps. Donaldsoni so closely resembles torrida in other respects, 

 it will probably be found that the few data lacking for torrida are 

 as in Donaldsoni. As to the variations of torrida — 8. two cross- 

 veins in one wing out of twenty-four wings; 10. crossed in two 

 wings out of twelve; 11. four-celled in three wings out of twelve. 

 Pseudomacromia hova. 



Lihellula hova Rambur, Nevr., p. 92, 1842, doubtfully referred 

 to Onychothemis by Mr. Kirby (Cat. Odon., p. 24, 1890), was 

 placed with Pseudomacromia by Dr. Karsch (Berl. Ent. Zeit., 

 xxxiii, p. 369, 1890; xxviii, p. 21, 1893). 



* These numbers refer to the numbered characters of the table. 



