170 Annals of the Carnegie Museum. 



Front wings with 8-9 postnodals, hind with 7 ; 90 per cent, of the 

 hind wings of 15 $ have M 2 arising nearest the fourth postnodal. 



Dimensions : Abdomen 19.5-20; hind wing 12. 5-13 ; width of head 

 2.76; width of one postocular spot .32 ; height of abdominal segment 

 10.8; height of segment 9 at base . 76 ; width of dorsal process of 10, 

 end view, .22 ; maximum width of 10, end view, .64 mm. The last 

 six measurements taken from one individual only. 



9. Nasus black, its free margin narrowly pale. In the Cachoeira 

 example the black dorsal marks on 9 reach the whole length of the 

 segment. Two females have M 2 on the hind wings arising nearest the 

 fourth postnodal ; in the third female it arises nearest the third. Ab- 

 domen 20-21.5, hind wing 14-15 mm. 



Habitat ; — Brazil, Cachoeira Cuyaba, flooded campo, January 26, 

 2 cT, 1 9, No. 15, and Chapada, 6 J^ and parts of 10 others, and of 1 

 9, nos. 77, 147, 147^, all by H. H. Smith. Carnegie Museum, Pitts- 

 burgh. 



Barreiras, State of Bahia, January 3, 1908, 1 imperfect cT ', and Sete 

 Lagoas, Minas Geraes, May 4, 1908, 1 9, both by J. D. Haseman. 

 Carnegie Museum. 



80. Acanthagrion chararum, sp. no v. 



(Plate V, figs. 88, 89.) 



tf. Vertex dark blackish-brown, this color reaching down between 

 the antennae to the nasus, which may be of the same color narrowly 

 bordered with blue on its free margin, or blue with a dark streak on each 

 side. Blue postocular spots very large, separated only incompletely 

 from the pale (cream?) color of the rear of the head by a narrow 

 brownish stripe. Rhinarium, labrum, gense, and external surfaces of 

 mandibles pale blue ; a black mid-basal labral point ; labium pale (blue 

 or cream-color?). 



Prothorax blackish-brown, front lobe, a lateral spot and a pair of 

 median lines on the middle lobe, middle of the hind lobe and the 

 sides inferiorly blue ; hind margin of hind lobe convex, low. 



Dorsum of meso-metathorax dark reddish-brown ; a blue antehu- 

 meral stripe widening somewhat inferiorly, at mid-height one-fourth 

 to three-fifths as wide as the dark mid-dorsal, and one-half, or more, 

 as wide as the dark humeral stripe ; the dark mid-dorsal stripe is 

 much contracted at its extreme anterior (lower) end ; the dark hu- 

 meral stripe is contracted both at the upper and near the lower end of 



