197 ISciifMHr 



Hagen in his synopsis gives " Libellula Justinian a Selys " as a syn- 

 onym, evidently through inadvertence, " Libe'llula justina Selys" being 

 intended, as is evident from the description, as well as from his giving 

 " Libellula justiuiana Selys " as a synonym to his Diplax justiniana 

 immediately below ; in one the vulvar lamina is erect, in the other 

 suberect. 



Diplax justiniana (Selys) Hagen. 



I have specimens which agree altogether with Hagen's careful 

 description of this species, with the following exceptions : The 

 appendages of the adult S are brownish-black, being rufo-fuscous, 

 as described by Selys, in the teneral stage ; the pterostigma is pale 

 fuscous in both stages and sexes, instead of yellow as described by both 

 Selys and Hagen ; the membranule is nigro-cinereous, edged with 

 black, in the adult $ . 



The colors of the living specimens are as follows : — Vertex of head 

 and upper part of face bronze-black with purplish reflections (adult 

 5 ) or dusky greenish-yellow (teneral ($ ) or lemon-yellow (teneral ? ) ; 

 middle of face very dark brown (adult 5 ), or dusky greenish-yellow 

 (teneral 3), or lemon-yellow (teneral ?); labrum reddish-brown 

 (adult (J ), or testaceous (teneral 5 ) or lemon-yellow (teneral ? ) ; 

 dorsum of thorax velvety-black (adult 5 ) or reddish-brown, pale 

 along the middle (teneral (5 ) or yellowish-brown with a lemon-yellow 

 median band (teneral ? ) ; pleura of thorax dark dull olivaceous-green 

 (adult $ ), or dark dull green (teneral 5 ) or lemon-yellow (teneral 

 ? ) ; abdomen black prulnose, some of the terminal segments — the 

 particular ones not noted at the time of description, and not indicated 

 on the dried specimens — very dark bronze-green (adult 5 ), or black 

 pruinose, marked with reddish-brown mixed with black (teneral $ ), 

 or yellowish brown marked with black (teneral ?). 



Antecubitals 8-9; postcubitals 6-7; length 1.04-1.16 inches; alar 

 expanse 1.64-1.88 inches. 



1 adult $ , 2 teneral $ , 1 teneral ? . 



Diplax abjecta (Ramb.) Hagen. 



To this species must, I suppose, be referred four male specimens 

 which I captured in the Tsle of Pines, although the basal spot of the 

 wings is altogether absent, the pterostigma is almost fuscous and 

 measures scarcely more than three millimetres in specimens whose 

 expanse of wing is 56 millimetres; the base of the legs are reddish- 

 brown. 



In life the vertex and front above are bright steel-blue ; the face 

 below pitchy-black; the dorsum of the thorax velvety-black; th© 



