PERITHEMIS. 185 



21. D. Imbuta. 



Libdlulfi imbuta Say, Journ. Acad. Philad. VIII, 32. 



g . Abdomen red, the segments black at apex ; thorax green ; 

 vertex chalybeous. 



9 . Abdomen greenish, segments black at the apex. 



Hab. Island qf Sanipuxten, coast of Maryland. (From the 

 description of Say.) It is entirely unknown to me. 



PERITHEMIS HAGEN. 



Eyes connected in a short space; posterior lobe of the pro- 

 thorax large, broad, bilobed ; abdomen much shorter than the 

 wings, broad, depressed, narrower at base ; legs moderate, slender ; 

 the first sector of the triangle hardly sinuated ; triangle moderate, 

 broad; caudal appendages short; genital organs not prominent; 

 vulva obtected ; sides of the eighth segment of the female not 

 dilated. 



1. P. domitla! 



Libellula' domitia Drury, Ins. II, 83 ; pi. xlv, fig. 4. Burrn. Handb. II, 

 855, 40. Ramb.! Neuropt. 124, 132. 



Var. 1. Libellula tenuicincta Say, Jour. Acad. Philad. VIII, 

 31, 21 (<f). Libellula tenera Say, Jour. Acad. Philad. VIII, 31, 

 20(9). Libellula chlora Ramb.l Neuropt. 125, 133. Libellula 

 metella Selys, Poey Ins. Cuba, 451. 



Var. 2. Libellula iris Hagen. 



Flavescent, villose ; the sides of the thorax similarly colored : 

 dorsum of the abdomen, with an interrupted, brownish-black line 

 each side; feet flavescent; wings flavescent (g ), or the basal half 

 flavescent, with two fuscous, transverse stripes, the internal one of 

 which is often almost absent (9); pterostigma rufo-fuscous ; mem- 

 branule cinereous. 



Var. 1. Sides of the thorax fuscous, two interrupted yellow 

 lines each side ; all the wings of the male, with a basal, fuscous 

 point. 



Var. 2. Sides of the thorax of the same color with the remainder 

 of the body ; the wings hyaline, subflavescent, the anterior margin 

 yellow ; posterior wings of the female, with a fuscous nebula at the 



