Calvert: Odonata of the Neotropical Region. 127 



are less deeply bilobed at the apex than shown in his figure 3a, with 

 the result that the lower lobe or branch is less acute. 



The male from Sao Sebastiao has the blue-violet mid-dorsal stripe on 

 3 reaching to only two-fifths of the segment and no mid-dorsal stripe 

 on 4, but otherwise it seems like the others. 



$. Differs from the male as follows: A pale stripe bordering the 

 eyes posteriorly. Pale anthumeral stripe nearly half (or two-fifths in 

 one Rio Janeiro 9 ) as wide as the black mid-dorsal at mid-height, the 

 black humeral stripe half to nearly as wide as the pale antehumeral at 

 the same level. Black lateral stripes of abdominal segment 2 meeting 

 on the dorsum in the first, sixth, and eighth eighths of the segment's 

 length, so that the blue on the dorsum is limited to an elliptical spot 

 reaching from the second to the fifth eighth inclusive, and a smaller 

 isolated spot or dot in the seventh eighth. Transverse basal blue ring 

 on 3-7 mid-dorsally interrupted with black ; blue mid-dorsal longitudi- 

 nal stripe on 3 reaching back to two-thirds or three-fourths of the seg- 

 ment's length, but not confluent with the transverse basal blue ring ; no 

 mid-dorsal blue stripe on 4. 8-10 predominantly black, pale brown 

 (blue? in life) forming a posterior dorsal border to 8 and 9 the anterior 

 margin of which is straight on 9, but trilobed on 8, the middle lobe 

 tapering forward to nearly the basal fourth of the segment, or trilobed 

 on both 8 and 9, the middle lobe soon becoming a mere line prolonged 

 forward mid-dorsally, or this middle lobe prolonged forward as a 

 wider stripe almost to the base of 9 and to the basal fourth of 8 ; dorsum 

 of 10 may be chiefly pale or wholly black. Mesepisternal tubercles 

 cannot be said to be present in this species ; only a very low con- 

 vexity occupies the site of each. Three Nova Friburgo females have 

 longer abdomens (31 mm.), two of the Rio de Janeiro examples have 

 shorter hind wings (24 mm.) than the previously published dimensions 

 admit. 



All the wings of all the specimens listed below have four antenodal 

 cells distal to the quadrilateral (except 5 in one front wing of 1 Rio 

 de Janeiro 9 ) and in all the pterostigma surmounts more than one cell 

 — rarely as much as two cells. 



Habitat : Brazil, Nova Friburgo in Rio by Beschke, cotypes of 

 Hagen, 4^2?. Museum of Comparative Zoology, 1^2?. 

 Collection of P. P. Calvert, ex coll. P. R. Uhler. 



Rio de Janeiro, in November and December, by H. H. Smith, 1 $ 

 and parts of 2 others. Carnegie Museum. 



