MACROMIA. 133 



dorsum each side, in front, with an abrupt yellow stripe, and the 

 sides with an oblique, medial, yellow one; feet black; abdomen 

 long, slender, brownish-black, segments 2 8 each side with a 

 dorsal, yellow spot; appendages black, the superior ones cylindri- 

 cal, with a small tooth outside ; the apical half a little incurved, 

 the apex acute; the inferior appendage equal, triangular, narrow; 

 wings hyaline, pterostigma small, black; membranule cinereous. 

 Male. The vulvar lamina is bilobed. (Female from the descrip- 

 tion of Rainbur.) Twenty antecubitals ; nine postcubitals; one 

 discoidal areolet. 



Length 85 millim. Alar expanse 110 millim. Pterostigma 4 

 millim. 



Hob. ^Philadelphia ; Maryland (Uhler). 



2. M. cingulata. 



Macromia cingulata Ramb. Neuropt. 137, 1. 



Varied with black and yellow; mouth yellow; labium in the 

 middle, and margin of the labrum black; front excavated and black 

 superiorly; thorax violet-bluish, each side with three stripes, which 

 are anteriorly abrupt, yellow ; abdomen with yellow bands supe- 

 riorly, which are narrowed ; feet black ; wings hyaline, a spot at 

 base and the apex broadly flavescent; pterostigma small, rufo- 

 fuscous. (Female from the description of Rambur.) Antecubi- 

 tals ? postcubitals ? two discoidal areolets. 



Length near 50 millim. Alar expanse near 85 millim. 



Hab. North America. 



3. M. annulata ! 



Macromia annulata Hagen ! 



Fuscous, varied with yellow; mouth and front yellow, front ex- 

 cavated above and yellow, with a median fuscous line; thorax fus- 

 cous, somewhat tinged with brassy-green, dorsum each side with a 

 little abrupted fascia, and the sides each with two oblique stripes, 

 yellow ; feet black, base of the anterior femora yellow ; abdomen 

 long, slender, fuscous, segment 2 with a transverse fascia, segments 

 3 to 8 with a large, dorsal, quadrangular spot, yellow; appendages 

 fuscous, yellowish at base; the superior ones cylindrical, with a 

 tooth upon the external middle, the apical half subincurved, the 

 apex obtuse; the inferior appendage yellowish, equal, triangular ; 

 the vulvar lamina short, excised ; wings hyaline, the extreme base, 



