354 ENTOMOLOGICAL NEWS. [Oct., 'l6 



Wings slightly brownish-tinged or hyaline ; stigma brown to dark 

 brown or black. 



$ : The female of ascendcns has not hitherto been described ; un- 

 fortunately the single specimen I took is teneral. Yellow appears only 

 on the dorsum of the head and nasus, the postocular spots and the 

 pale markings of the thorax and basal abdominal segments being 

 light clear blue, just as in "gracile." The pattern of the dorsum of 

 the head is pale, but the black is not reduced to the extreme degree 

 found in some males ; probably the pattern will be found to be as 

 variable in the female as it has been shown above to be in the male. 



The antehumeral blue stripe is wide ; the humeral stripe is reddish 

 brown, diffuse at the edges, black at the superior extremity, and dark- 

 er below, near and on the mesinfraepisternum. There is no trace of 

 the black spot on the second lateral suture or a dark line or stripe on 

 the metepisternum along this suture. The metepimeron is bluish- 

 tinged above and along the second lateral suture but fades rapidly 

 into the cream color of the coxae and under parts. 



Abdominal segments i and 2 patterned as in the male, the pale color 

 light blue; 3-7 with basal rings less conspicuous than in the male; 7 

 with the apical integument only blue, but this will probably be found 

 to vary in this sex as in the male ; 8 with the apical third or fourth 

 blue ; 9 blue with a larger quadrangular dark spot on either side, this 

 spot produced posteriorly at its two posterior corners, these points 

 reaching about the middle of the segment; 10 blue; appendages brown. 



Legs pale, as described for the pale males. 



Wings hyaline, stigma light brown (teneral). 



Georgetown, British Guiana, January 25, 26, 27 and 28, 



1912, 15 $ , i $ ; Paramaribo, Dutch Guiana, Feb. 23, 1912, 



i $ \ Trinidad, localities as follows, all in 1912, Cunapo 



River, Feb. 27, n $ ; St. Joseph River, Feb. 28, March 10, 



2$ ; St. Ann River, March i, i $ ; Arima, March 4, 2 



$ ; Maracas River, March 5, 2 $ ; Cumuto, March 6, i 



$ ; Baracon, Chaquanas, March 7, i $ . 



Ascendens has hitherto been known from a single male from 

 Cachoeira, Brazil. A male from Georgetown was sent to Dr. 

 Calvert who confirms the identification. Ascendcns is one of 

 the gracile group in which the fully colored male (and prob- 

 ably older females) has departed from the ancestral blue col- 

 oration of the thorax and basal abdominal segments and has 

 taken on green and yellow colors. The wide distribution of 

 the species as shown by the present collection should make the 



