GYNACANTHA. 131 



25. 2B. furcillata. 



jEschna furclllata Say, Jour. Acad. Pliilad. VIII, 15, 7. Gynacantha 

 quadr/Jida Ramb. ! Neuropt. 209, 1. 



Yaried green and fuscous ; face yellowish, beneath obsoletely 

 spotted, above with a somewhat T-shaped mark, which is dilated 

 at base, black ; thorax pubescent, green, dorsum rufo-fuscous, with 

 two green stripes each side, the superior ones being transverse, and 

 short ; the sides with a fascia composed of three spots, black ; ab- 

 domen long, cylindrical, inflated at the base, and then narrowed; 

 varied with black and green, the basal spots larger; superior ap- 

 pendages long, foliaceous, subincurved, with a basal and medial 

 tubercle beneath ; the inferior appendage short, bifurcated, the 

 branches diverging ; wings hyaline, pterostigma short, broad, quad- 

 rangular; membranule sub-obscure. ( g . From the descriptions 

 of Rambur and Say.) 



Size of Libellula femiginea Ramb. ; but longer. Length 55 ? 

 millim. 



Hub. North America (collection of de Selys Longchamps) ; Mas- 

 sachusetts (Say). 



GYNACANTHA RAMB. 



Wings, with the anal angle of the posteriors, in the males, acute ; 

 second segment of the abdomen auriculated ; last segment of the 

 female spinous beneath. 



1. Gyn. trifida ! 



Gynacantha trifida Ramb. Neuropt. 210, 3. Selys, Poey Ins. Cuba, 459. 



Fuscous, spotted with green ; head obsoletely green in front, 

 above with a T spot, black ; thorax fuscous, dorsum each side with 

 a cuneiform, green stripe ; sides green, with two oblique, fuscous 

 lines; feet rufo-fuscous, tarsi black ; abdomen long, slender at the 

 base, inflated, then narrowed fuscous, nearly all the segments with 

 spots upon the middle, and two at apex, green ; appendages fus- 

 cous, superior ones of the male, slender, the base narrow, cultriform, 

 the apex acute, subaduncate, interiorly ciliated; the inferior one 

 very short, triangular, obtuse ; those of the female very long, foli- 

 aceous, towards the apex broader, obtuse ; the last segment pro- 

 duced beneath, with three spines; wings hyaline, the base, in the 



