Calvert : Odonata of the Neotropical Region. 89 



24, 1899, 2 cP ; near Coroico, June 3, 1899, 1 J 1 ; all by W. J. Ger- 

 hard. Academy of Natural Sciences of Philadelphia. 



The specific name is taken from that of a human tribe of the neigh- 

 borhood. 



14. Heliocharis amazona. 



(Plate VIII, fig. 139.) 



Heliocharis amazona Selys, Syn. Calopt., p. 55, 1853; Monog. Calopt., p. 188, pi. 

 5, fig. 5 (wing), pi. 14, fig. 5 (apps. $ ), 1854 ; Bull. Acad. Belg. (2), xxvii, p. 

 661, 1869. 



The type " C? jeune " from Ega, on which were based the descrip- 

 tions of 1853 and 1854, was stated to have " le dessus du thorax 

 olivatre," no mention being made of any dark markings. The 

 description of 1869, of a male from Para, reads " Devant du thorax 

 verdatre avec une raie a la suture dorsale, une antehumerale et une 

 double humerale noiratres." The present material has a very distinct 

 narrow black stripe on the mid-dorsal thoracic carina, but any humeral 

 or antehumeral markings are very indistinct and doubtful, although the 

 sides and ventral surface of the thorax are partly pruinose. 



The abdomen, of which very brief mention is made in the descrip- 

 tions, is greenish at its base (segments 1 and 2), blue on the follow- 

 ing segments, with these black or blackish-brown markings : the 

 intersegmental articulations, a narrow mid-dorsal stripe reaching the 

 entire length of each segment from 2-10, having a hastate form on 

 2-6, the anterior third of 10, a longitudinal lateral stripe on 2-10 as 

 long as the segments, not confluent with the mid-dorsal stripe except 

 at the intersegmental articulations and at the base of 10. 



Anal vein (= postcostal of de Selys) separating from the hind mar- 

 gin (/. e., wings ceasing to be petiolated) distinctly proximal to the 

 level of the arculus and at, or proximal to, the level of the cubito- 

 anal cross-vein. M l+2 (= principal sector of de Selys) separating 

 from M 3 (= median sector of de Selys) 2—2^ cells beyond the level 

 of the distal end of the quadrilateral on the front wings, i—ij4 cells 

 on the hind. Distance from base to nodus 14 (front wings), 12-12. 5 

 (hind wings); from base to proximal end of stigma 26.5-27 (front), 

 24 (hind) mm. Quadrilateral with one cross-vein, except in one 

 front wing and one hind wing. Median area (= basilar, Selys) with 

 1-4 (front wings), 2-3 (hind wings) cross-veins. One row of cells 

 throughout the entire second cubital area (= espace postcostal, Selys). 

 Two (in one front wing 3) basal subcostal cross-veins on all the wings. 



