36 E. 1'. Williamson- 



Tapajos six'cimcns in tlic Uritisli MuscnnL 'I'lic last oi)ini((n. that of Kis (36), 

 that suh7'indis is a synonym of Coryf^liacsclnia Inlciponiis is as pbiusible a!% 

 any. With the loss of the imperfect type, which lacked a locality label, 

 further discussion of the application of the name is futile. 



The only ajiricularis we saw alive came flying down a little creek near 

 Palma Sola at the noon hour, circled once or twice the little pool at the edge 

 of which we were seated eating our lunch, and then alighted on some small 

 tree rootlets on the underside of an overhanging washed out creek bank. 

 Here it was impossible to use a net and the dragonfly was carefully stalked 

 and caught in the fingers. 



Material examined: Costa Rica, probably Ontario Farm (C. H. Lankes- 

 ter, September 18, 191 9, i female, A. N. S.) ; Venezuela, Palma Sola, Dept. 

 Falcon (March 6. 1920, i male, E. B. W.) ; British Guiana, Bartica (H. S. 

 Parish. May 21, 1901, i male, O. S. U.) ; French Guiana, Pied Saut, Oyapok 

 River (S. M. Klages, Nov., 1917, i male, Ace. 6111, Carn. Mus.) ; Brazil, 

 Para (C. F. Baker, i male, i female, U. S. N. M., i female, E. B. W.). Val 

 del Can, Para (Hagmann, May 19, 1901, I female, Ris), Chapada (Gyn. 

 "t," number 195, i male, M. C. Z.), Tapajos (1 male. British Museum, 

 determined by Kirby as subz'iridi^) . 



Gynacantha klagesi, new species 



Abdomen male 47-49. female 50; hind wing male 47-4<^. female 50; 

 superior appendage male 6, female 5.4; stigma front wing 3/)-3.9- 



Male. — Labium yellow, greenish at the side; face green, yellowish below 

 and against the eyes, darker above ; f rons above brown in front for more 

 than half its length with a brown bar to the black frontal vesicle, the pale 

 area on either side of the bar light greenish gray ; occiput green or yellowish ; 

 rear of head yellowish, narrowly shining black above, with a broad bar of 

 brown or black down to the foramen. 



Prothorax light brown, posterior border green. 



Thorax bright green above, middorsal carina and margins of the antealar 

 sinus black or brown, the carina narrowly bordered on either side with 

 brown ; a short, broad antehumeral. stripe or area occupying the outer half 

 and lower two thirds of the mesepisternum, darkest along the anterior edge 

 parallel to the carina, and shading out on all the other edges ; sides of 

 thorax bright green, a pale brown line on the humeral suture, a short brown 

 line above on the first lateral and a darker brown line on the second lateral 

 suture. Interalar wing spots green anteriorly and blue posteriorly ; spots 

 beneath the front wings green, beneath the hind wings blue and yellowish. 

 F^>eneath pale flesh. 



Abdomen brown to black, the apical segments darkest ; i brown, L large, 

 yellow, shading into blue above, D apparently not present, extreme apex 

 dark to black; 2 with AML yellow below and blue above, auricles below 

 bright yellow with greenish shadings, above blue, broadly surrounded with 

 dark brown or black, the blue not continuous with AML; AD and MD 

 narrow, green in color, the latter apparently continuous into PD which is 

 joined with PL to form a broad blue transverse bar; transverse carina and 



