104 Annals of the Carnegie Museum. 



Legs yellow, femora with two dark longitudinal lines, one inferior, 

 the other superior, a dark inferior line on the first and second tibiae. 



Wings almost clear, stigma surmounting two cells, distal edge 

 slightly more oblique than the proximal edge, in younger examples 

 bicolored — brown with the distal third obliquely yellowish — in older 

 individuals entirely brown ; 10-13 postnodals on the front wings, 

 9-12 on the hind. 



9. Differs from the male as follows : no coat of long pale hairs on 

 7 ; 8-10 pale yellow or green ; a brown stripe on each side of dorsum, 

 this stripe extending down on the sides at the apex of 9 and of 10 ; a 

 darker inferior line on the third tibiae also ; abdominal appendages not 

 quite as long as 10 is dorsally, yellowish at base, brownish beyond, 

 straight ; margin of genital valve minutely denticulated, " palp " reach- 

 ing almost to level of tips of abdominal appendages ; pterostigma 

 bicolored, as described above for younger males. 



Abdomen: (^35-36.5, 9 31-34; hind wing : rj 1 ? 21-21. 5; costal 

 edge of stigma, front wing, cT*9 1.4 mm. 



Habitat. — Brazil: Sao Paulo, September 14, 1900, 4 d\ 2 9, by 

 A. Hempel, collector's number 301, Academy of Natural Sciences of 

 Philadelphia (type). 



Chapada, by H. H. Smith, 1 $ No. 183. Carnegie Museum, 

 Pittsburgh. 



The Chapada male is much discolored, but the appendages and the 

 pectoral pattern leave no doubt of its belonging to this species. 



29. Lestes undulatus Say. 

 (Plate I, fig. 16; Plate II, figs. ^, 34.) 



Habitat. — Brazil: Rio Grande do Sul, by H. H. Smith, 1 c? 

 (segments 7-10 lacking). Carnegie Museum, Pittsburgh. 



Uruguay: Montevideo, 1 $ ex Mus. Berol., Museum of Compara- 

 tive Zoology, Cambridge, Mass. 



Chile: Banos de Cauquenes, C. E. Reed, 1 $. U. S. National 

 Museum. Penco, 7 c? 8 9, Tolca, 1 c? 1 ?, Concepcion, 1 c? 2 9, 

 Lota, all in January, 1905, by C. E. Reed. Academy of Natural 

 Sciences of Philadelphia. 



30. Lestes quadristriatus, sp. nov. 



(Plate I, fig. 13; Plate II, figs. 35, 36.) 

 d\ Vertex, frons, and nasus blackish-brown ; rhinarium, genae 

 below the level of the frons, labrum, and external faces of the mandibles 



