394 ACADEMSr OF NATURAL SCIENCES 



oueS; with a longitudinal spot each side, contracted in the mid- 

 dle and not reaching the base; terminal process conic, acute, not 

 at all compressed ; thighs with a brown line above towards the 

 tip ; tibia and [18] tarsi blaek-piceous ; the former yellowish on 

 the inner side ; abdomen not remarkably clavated. 



Length two inches. 



This species resembles the fratema, but it is much more yel- 

 lowish, the stigma of the wings is about double the size, the 

 ma,rkings differ. It also resembles unguiculata Vanderlinden, 

 but the stigma is much larger. 



[Belongs to Gomphus Leach. — Uhler.J 



LIBELLULA. 



1. L. HYMENJBA. — Wings hyaline; posterior wings with the 

 anal margin brown, with white nervures ; anal membrane white, 

 opaque. 



Inhabits Indiana. 



9 Vesicular front fulvous ; stethidium dull yellowish-green ; 

 -wings hyaline ; stigmata small ; posterior pair wider at base, the 

 anal margin brown, particularly towards the anal angle, which, 

 however, this color does not reach, neither does it attain to the 

 origin of the wing, the nervures of this brown margin are yel- 

 lowish-white ; anal membrane opaque, pure white ; scutel trica- 

 rinate ; abdomen with a carinate line above, and on each side ; 

 second, third, fourth, and fifth segments with two transverse, 

 elevated lines towards their middles ; anal processes cylindricalj 

 mucronate ; feet blackish ; anterior pairs of thighs greenish-white 

 exteriorly ; anterior pairs of tibiae with a whitish line. 



Length nearly two inches. 



Readily distinguishable by the whitish nervures in the brown 

 anal margin of the posterior wings, and the snow-white anal 

 membrane. It seems to be allied to L. Carolina. [19] 



2. L. CAROLINA Linn. — Basal fifth of the posterior wings 

 fuscous. 



Length two inches. 



Drury, Ins. Vol. 1, pi. 48, fig. 1. Ency. Meth. p. 565. 



3. L. TRANSVERSA. — Thorax with a white band before the 



wings, and another between the wings. 



Inhabits Massachusetts. 



[Vol. VIII. 



