102 Annals of the Carnegie Museum. 



presque contre la raie bleue juxta-humerale " of the original descrip- 

 tion — is of almost equal width at mid-height, .28 mm. in the type, 

 .24 mm. in that from Chapada, and is situated at the same distance 

 from the mid-dorsal carina, /. e., .4 mm. at mid-height ; abdominal seg- 

 ments 8-10 brown with a mid-dorsal longitudinal green (not 

 " brune ") stripe ; the sides of 8 for the entire length of the segment 

 and the middle two-fourths of the sides of 9, pale green. 



Habitat. — Brazil: no definite locality, 1 (5\ 1 $ each with two 

 labels in Hagen's handwriting "Brazil Fischer" and "L. picta." 

 Museum of Comparative Zoology, Cambridge. Presumed types. 



Chapada, by H. H. Smith, 1 $, collector's number 9. Carnegie 

 Museum, Pittsburgh. 



26. Lestes tricolor Erichson. 

 (Plate I, fig. 9 ; Plate II, figs. 29, 30.) 



Habitat. — Brazil : Bahia [?] 1 J\ Museum of Comparative 

 Zoology, Cambridge, Mass. 



27. Lestes tenuatus Rambur. 



(Plate I, fig. 12.) 

 Lestes tenuatus Calvert, Biol. Centr.-Amer. Neurop., pp. 48, 50, 352, 1901, 1907. 



Habitat. — Colombia : Don Diego in Dept. Magdalena, by H. H. 

 Smith, 1 d\ Carnegie Museum, Pittsburgh. 



28. Lestes dichrostigma sp. nov. 



(Plate I, fig. 8 ; Plate II, figs. 31, 32. ) 

 d\ Upper surface of head dull brownish, rhinarium, labrum, outer 

 faces of mandibles, genae below the level of the frons pale blue ; rear 

 of head and labium yellow. 



Prothorax violaceous, yellowish on each side of the middle lobe. 

 Thoracic dorsum violaceous, each mesepisternum with a slender 

 metallic-green stripe. 1-. 2 mm. wide at mid-height, slightly wider 

 above where it does not quite reach the antealar sinus, attaining the 

 anterior mesothoracic margin below, parallel to and distant from the 

 mid-dorsal carina by two to three times its own width. Mesepimeron 

 pale violaceous-brown having on the posterior margin a dark brown 

 stripe showing some metallic-green reflection, . 3 mm. wide, not reaching 

 antealar sinus, or mesinfraepisternum, this last with a dark brown spot. 

 Sides and sternum of metathorax pale yellow, perhaps tending to pale 

 bluish in life, upper end of metepisternum dark, blackish in older ex- 



