122 NEUROPTERA OF NORTH AMERICA. 



female, towards the apex, subflavescent, pterostigma short, fuscous, 

 or luteous (9) ; merabranule fuscous, the base white. 16 — lY ante- 

 cubitals; 8 — 9 postcubitals. 



Length 65 — 67 raillim. Alar expanse 90 — 100 millim. Pte- 

 rostigma 3 — Sg- millim, 



Hab. Pecos River, Western Texas (Capt. Pope) ; Upper Mis- 

 souri; Mexico; Cordova (Saussure). 



5. SI. clepsydra! 



Aeschna dcpsudra Say. Journ. Acad. Philad. YIII, 12, 4. 



Fuscous, spotted with blue; head luteous, an incurved, trans- 

 verse line in front, a broad T spot above, terminated with blue and 

 yellow, black; thorax fuscous, dorsum each. side with a cuneiform, 

 green stripe ; each side with two broad, maculose and lacerated 

 stripes, and an intermediate, abbreviated one, bluish-green ; feet 

 brownish-black, femora, tibiae and the outside of the tarsi rufous ; 

 abdomen long, slender, equal, very much attenuated behind the in- 

 flated base; segments 3 — 10 with two larger, apical spots, 3 — 8 

 with two triangular, medial ones and each side a basal, divided 

 one, segment 2 with a transverse, medial, interrupted fascia, and 

 the apex, blue; the last segment with a small, basal tooth above, 

 black, and blue spots confluent at the apex ; appendages fuscous, 

 margined with black, the superior ones long, narrow, straight, 

 narrower at base, interiorly with a carina and clothed with hairs, 

 the apex obtusely truncated, a small, acute, incurved tooth at the 

 apex; before the apex are three teeth, superiorly at the internal 

 margin ; the inferior appendage one-third shorter, elongately tri- 

 angular, acute ; wings hyaline, pterostigma moderate, fuscous ; 

 membranule fuscous. Male. 16 antecubitals ; 11 postcubitals. 



Length 68 millim. Alar expanse 94 millim. Pterostigma 4 

 millim. 



Hah. Massachusetts (Say); Boston (Scudder); Baltimore (Uh- 

 ler). 



6.|;'iE. verticalis ! 



Aeschna verticalis Hagen ! 



Fuscous, spotted with green and blue; head green, with a T 

 spot above, and a band before the eyes, black; thorax fuscous, 

 dorsum each side, with a cuneiform, green stripe; each side with 



