Calvert : Odonata of the Neotropical Region. 233 



Anterior lamina deeply bilobed, lobes separated by an interval more 

 than half as wide as each lobe, apices not widened, truncate, almost 

 smooth, equally as prominent as the inner branch of the two-branched 

 hamule. Inner (posterior) branch of this latter, acute, terminating 

 in a hook directed caudad and laterad ; outer (anterior) branch appar- 

 ently more prominent, badly damaged. Genital lobe less prominent 

 than the other two parts, wider than long. 



Legs blackish-brown, first femora green inferiorly. 



Wings clear, venation dark brown, stigma ochre-brown. Front 

 wings faint yellow at base half-way out to first antenodal and cubito- 

 anal cross-vein ; 1 2 antenodals, 9 postnodals ; three posttriangular cells, 

 followed by two rows increasing to three rows at the level of the last 

 (left), or next to the last (right), antenodal. Hind wings yellow at 

 base in subcostal area half-way to first antenodal, in cubital area to the 

 cross-vein (brownish in the extreme proximal end of this area), thence 

 in the anal area to the apex of the membranule, this last dark grey, 

 white at its extreme base ; 8 antenodals, 9-10 postnodals, two post- 

 triangular rows between M 4 and Cu p increasing at the level of separa- 

 tion of M 3 . Other venational details in the preceding table. 



9 . Differs from the male as follows : face and lips more obscure, pale 

 bluish-olive, where the male is greenish-yellow ; brown of thorax with a 

 metallic-blue reflection evident on the sides in the male ; antehumeral 

 yellow stripes not so distant at their lower ends (2 mm. ) ; yellow stripe 

 on each side of 4 reaching to three-fourth's length and on 5 to half- 

 length. Appendages brown, as long as 9, more than twice as long as 

 1 o ; apex acute ; 1 1 (anal tubercle ) more than half as long as the append- 

 ages. Vulvar laminare aching to two-fifthsof the lateral margin of 9, 

 bilobed in its apical third, lobes broad, rounded, not reaching the style- 

 like processes on the sternum of 9, which are about one-sixth as long as 

 the lateral margin. Apices of the wings in to the distal end of the stigma 

 pale brown. Front wings with 10-11 antenodals, 7-8 postnodals; 

 the two posttriangular rows increasing to three rows at the level of the 

 penultimate antenodal ; hind wings with the yellow of the subcostal 

 area reaching out to the first antenodal, that of the cubital area not 

 brown proximally. 



Abdomen cT 28.5?, 9 24, hind winged 33. 5, 9 30, costal edge 

 of stigma, front wing c? 2.8, 9 3 mm. 



Habitat: — Surinam, i 9, Paramaribo by Thorey, 1 d\ Museum 

 of Comparative Zoology, Cambridge, Mass. 



