630 PROCEEDINGS OF THE XATIOXAL MUSEUM. vol. 48. 



reddish flesh color without dark markings, and passing insensibly into 

 pale flesh on the metasternum (exactly resembling a Jletaleptobasis). 



Abdomen. — Male. Segment 1 continuing the pale color of the 

 thorax, with a shining blue-black apical ring which is widest in the 

 middorsal line: 2 similar, with the color of the apical ring covering 

 all the middorsum but the extreme base; 3-6 black, each with a 

 narrow pale yellow basal ring which is narrowed or interrupted in the 

 middorsal line: posterior to the middle of each of these segments is a 

 scarcely discernible brown area, in length about equal to the black 

 area posterior to it ; 7 at its base is colored like the preceding segments 

 but about its middle it begins to change to red, and at its apex it is en- 

 tirely this color: 8-10 red. Appendages dark reddish brown, almost 

 black externally, pale internally. Inferior appendages barely discern- 

 ible in lateral and dorsal views; in posterior view they are seen as flat- 

 tened, equilateral triangular bodies with each side slightly concave, 

 the posterior surface not bearing any spine or tubercle which makes 

 the so-called "inferior appendage." as seen in profile or dorsal view, 

 in the larger number of species. The real significance of '''inferior 

 appendages present" and ' "inferior appendages absent'' in this and 

 related species is that in one case the posterior surface of the inferior 

 appendage bears or is projected into some sort of a posterior tubercle 

 or prom in ence which is wanting in the other case. 



Legs. — Male. Pale yellowish: femora each with a subapical pale 

 brown area, and a similar area on each tibia at about one-third its 

 length. 



Wings beyond the nodus slightly milky, stigma black. 



Described from 1 male, Wismar, British Guiana. January 30, 1912, 

 in my collection. Just back of Wismar and north of the railroad 

 track is a bit of brushy swampy woods in which numerous small 

 streams lose themselves. The specimen was taken here among the 

 rank vegetation. In life it is a delicate and beautiful insect, the 

 translucent red parts of the thorax and especially the abdomen 

 suggesting the specific name. 



EPIPOTONEURA NEHALENNIA, new species. 



Length of abdomen, male 25 mm., female 22: hind wing, male 15 

 mm., female 15. 



Bead. — Male. Black, above with green reflections: labium pale 

 flesh; lower half of labrum dull pale yellow: anteclypeus and frons 

 below in front light yellow, continuous on either side with the yellow 

 genae; a very small triangular green spot, surrounded with black. 

 in front of each antenna and on the frons in front. 



Female similar to male; base of labrum brown instead of black, 

 and the green spots in front of the antenna larger and with a nar- 

 rower border of black. 



