Calvert : Odonata of the Neotropical Region. 97 



12 others, 6 9 and parts of 3 ? others, collector's number 140; 4 S 

 and parts of 3 others, collector's number 86. Carnegie Museum, 

 Pittsburgh. 



All the males are more or less pruinose and consequently mature. 

 One or two of them give hints, that, when immature, their coloring is 

 nearly the same as that described above for the females. 



The specific name proposed refers to the pectoral color-pattern. 



22. Lestes spumarius Selys. 



Habitat. — Cuba: 2 cT; Museum of Comparative Zoology, Cam- 

 bridge, Mass. 



One of these males, numbered y T 7 , perhaps by Poey, bears a label 

 "L. spumaria? 9 " in Selys' hand; it has 10 postnodals on all the 

 wings and is smaller than the type. 



23. Lestes mediorufus sp. nov. 

 (Plate 1, fig. 10; plate II, figs. 23, 24.) 



cj\ Younger. — Dorsal surface of head dull blackish-brown; rhina- 

 rium, labrum, external faces of mandibles, genae below level of frons, 

 pale blue ; labium and rear of head yellow. 



Prothorax brownish above, pale green on each side. 



Thorax pale greenish ; a mid-dorsal reddish band about 1.0 mm. 

 wide ; a short black line on the upper end of the humeral suture ; a 

 reddish-brown stripe, of irregular width of .1— . 2 mm., on the lower 

 two-thirds of the mesepimeron ; a black line on the upper third of the 

 obsolete first lateral suture, terminating inferiorly in a round spot. 

 Metapleuron lightly pruinose, except at the upper end of metepisternum; 

 pectus yellowish, an anterior metepimeral black stripe, .6 mm. long, 

 above the anterior end of the latero-ventral carina, and a wider meta- 

 sternal black stripe, 1.2 mm. long, close to and parallel to the same 

 carina, neither of these stripes confluent with each other, nor with their 

 fellows of the opposite side. 



Dorsum of abdominal segments 1-5 dark metallic-green, becoming 

 brown on 6-10 ; a fine pale mid-dorsal line on 2-6 or 7, sides of 1-6 

 or 7 inferiorly, a narrow transverse basal mid-dorsally interrupted ring 

 on 3-6 or 7, pale blue. 



Superior appendages longer than 10, not as long as 9, curved toward 

 each other in the apical third, pale brown, darker at the tips. In 

 dorsal view, the inner edge of each bears at one-fifth length a back- 



