Vol. XXVli] ENTOMOLOGICAL NEWS. 323 



of one segment from the succeeding segment; seen from the side the 

 blue and black of 8 are about of equal width, the black descending 

 possibly a little more than half way, and there is a very narrow apical 

 black ring; on 10 the dorsal black is extended narrowly on the sides 

 of the segment at the base, reducing the blue to a large apical spot, 

 beneath dull yellowish brown. Superior appendages black, sometimes 

 brown on their posterior face, the apical inner angle with a minute 

 acute spine; inferiors dark brown or black, pale at base and below. 



Legs brown, coxae black-spotted in front at the base; femora dark 

 on the superior face, increasing apically where the black surrounds the 

 femur, the first femora the darkest, the last the palest, and varying in 

 individuals; when reduced tending to break up basally (where it first 

 disappears) into spots; tibiae with their anterior dorsal face black- 

 lined, darkest on first tibiae, least developed on the last; tarsi black; 

 tooth on tarsal claw as in gracilc, possibly very slightly less developed. 



Wings hyaline; stigma orange or reddish brown, conspicuous in 

 color to the unaided eye. 



9. Similar to the male, slightly duller and darker and with the 

 black markings reduced. Genae lighter, light yellowish brown. Ap- 

 parently as variable as the male in the color pattern of the head and 

 thorax; the posthumeral black stripe noticeably more reduced than in 

 the male, the upper and lower ends distinct but the intervening space 

 represented by the merest black line or an indefinite row of discon- 

 nected obscure dark markings. On the metepimeron the distinction of 

 pale yellow and dull orange is not so well marked. 



Abdomen above black with greenish reflections, most marked on the 

 proximal segments and completely disappearing or_ the distal seg- 

 ments; 3-6 with narrow basal rings or spots, slightly duller than in 

 the male and with the pattern less definite; 7 with basal ring scarcely 

 evident, and no trace on 8 of the basal blue spots often present in the 

 male; extreme apex 7-9 blue; 10 blue except a small narrow triangular 

 median black spot, the base of the triangle on the base of the seg- 

 ment. Sides similar to male; 8 with the entire lower edge narrowly 

 yellowish ; 9 apically at midheight with a large indefinite blue or yel- 

 lowish area ; 10 with the black on dorsum produced laterally nar- 

 rowly along base, the sides bright blue, yellowish below ; the restricted 

 dorsal black results in 10 being much paler in the female than in the 

 male, in contrast with 8 and 9 which are much darker in the female 

 than in the male; appendages black. Vulvar spine large, black tipped. 



Legs as in male. Wings hyaline ; stigma pale brownish yellow. 



Wismar, British Guiana, January 30, Feb. 15 and 16, 1912, 



20 5,2 ? ; types $, ?, Feb. 15, in the writer's collection. 



