AESCHNA. - 129 



apex, of the segments, with a subinterrupted, narrow, green fascia; 

 appendages black, subarcuated, the base narrower, a tubercle be- 

 neath, the apex carinated, truncated, inner edge villose ; inferior 

 appendage one-half the length of the superior, narrow, almost 

 equal, the apex obtusely truncated, sometimes almost bifid ; ap- 

 pendages of the female broad, ovate, foliaceous ; wings hyaline, 

 subflavescent in the middle, the apex sometimes infuscated, ptero- 

 stigma long, narrow, fulvous ; membranule white ; twenty-five an- 

 tecubitals ; sixteen postcubitals. 



Length 85 — 96 millim. Alar expanse 108 — 120 millim. Ptero- 

 stigma 5 — 6 millim. 



Hab. Indiana (Say) ; Massachusetts (Harris) ; New York 

 (Calverly) ; N. Jersey (Guex) ; Maryland (Uhler) ; Tennessee 

 (Saussure) ; Waterville ; Mobile ; Florida, Lake Harney (Osten 

 Sacken) ; Louisiana (Schaum) ; Mexico (Rambur). 



21. Si. brevifrons ! 



uSLschna brevifrons Hagen. 



Fuscous, varied with blue; head luteous in front, varied with 

 fuscous ; front short, broad, above with a T spot in the middle, the 

 root of which is triangularly dilated, black, surrounded with a yel- 

 low margin; thorax with the dorsum luteous, a short, fuscous 

 streak each side ; the sides blue, obscurely varied with white and 

 black; feet yellow, beneath, knees, and the tarsi, black; abdomen 

 inflated at base, nigro-fuscous, the segments with middle triangular 

 spots and oval apical ones, blue; segment 2 has a transverse, me- 

 dial, blue line, each side, bounded by black; segment 10 (J") has 

 the apex rounded, blue, a small, elevated tooth at base, and a 

 black spot each side; superior appendages foliaceous, fuscous, 

 narrower at base; the inferior one luteous, broad, triangular, a 

 little shorter than the superiors ; appendages of the female short, 

 foliaceous, fuscous ; wings hyaline, pterostigma short, fuscous ; 

 twelve antecubitals ; ten postcubitals. 



Length 6T millim. Alar expanse 91 millim. Pterostigma 2^ 

 millim. 



Hab. Acapulco, Mexico ; Valparaiso. 



22. Si. pentacantha ! 



JEschna pentacantha Ramb. ! Neuropt. 208, 22. 



Varied rufous and green; front produced; face yellow, subex- 

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