Calvert: Odonata of the Neotropical Region. 99 



to the mid-ventral groove (S. Paulo, i d\ abdomen 26, hind wing 17 ; 

 costal edge of stigma, front wing, 1.25 mm.). 



9. Colored like the younger males described above, except as 

 follows : No black lines on the upper ends of the humeral and first 

 lateral sutures, dorsum of abdominal segments 1-10 pale brown, sides 

 of 1- 10 inferiorly and a narrow transverse basal ring on 3-7 pale green 

 or blue. Abdominal appendages not quite as long as 10, straight, 

 tapering, pale yellow. Genital valves minutely denticulated, their 

 "palps" reaching backward nearly to the level of the apices of the 

 appendages. 



Dimensions of the younger males and the female : Abdomen c? 

 28.5-29.5, 9 28 ; hind wing c? 18—19, ? I 9 '> costal edge of stigma, 

 front wing, 1.4 mm. 



Habitat. — Brazil : Sao Paulo, September 14, 1900, by A. Hempel, 

 5 d\ 1 9 j collector's number 302. Academy of Natural Sciences of 

 Philadelphia. (Type. ) 



Chapada by H. H. Smith, 1 cT, no number. Carnegie Museum, 

 Pittsburgh. 



Four of the Sao Paulo males are those above described as ' ' younger. ' ' 

 It will be noted that they are larger than the fifth (oldest) male from 

 the same locality and the Chapada male. 



24. Lestes paulistus sp. nov. 

 (Plate I, fig. 14; Plate II, figs. 25, 26.) 



d\ Dorsal surface of head blackish-brown, a triangular pale blue 

 spot postero-laterad to each lateral ocellus, frons and nasus slate-col- 

 ored ; rhinarium, labrum, external faces of mandibles and gense below 

 the level of the frons pale blue ; labium and rear of head cream-colored. 



Prothorax blue, a longitudinal blackish stripe on each side. Thorax 

 pale bluish. Each mesepisternum with a metallic-green stripe 1.5 

 mm. wide in its lower half, above which it becomes a mere line, again 

 enlarging on its outer (lateral) side in the upper third of the sclerite 

 into a large spot, .5 mm. in width, not reaching the antealar sinus ; in 

 its lower half this stripe is distant from the mid-dorsal carina by .3 

 mm., near its upper end by .2 mm. A blackish line on the upper 

 end of the humeral suture. Mesepimeron with two elongated blackish 

 spots having some metallic-green reflection, one above the other, the 

 upper larger. Pectus somewhat pruinose ; a slightly elongated black 

 anterior metepimeral spot on the anterior end of the latero-ventral 



