242 PROCEEDINGS OF THE ACADEMY OF [1899. 



Abdomen blackish, sides of 1-3 with some pale green, of 4-9 with 

 a small indistinct yellowish -brown streak close to the lateral carinae. 

 Genitalia of 2 inconspicuous; anterior lamina very slightly devel- 

 oped, its margin entire; hamule bifid at the extreme tip only, the 

 anterior (inner) branch apparently hooked; genital lobe a little 

 more prominent than the hamule, a little longer than wide, its tip 

 regularly rounded. 



Terminal abdominal appendages black ; superiors about as long 

 as 9 + 10, slender, thickest at four-fifths their length, with some 

 inferior denticles, apex acute ; inferior appendage reaching to 

 slightly beyond the thickest part of the superiors. 



Legs black, the under surfaces of the first femora, and of the 

 second femora at base, and most of the trochanters pale green. 



Wings: venation, including the costa, mostly black, but the 

 antenodals and the cross- veins immediately below yellow. Pter- 

 ostigma dark brown with a yellow spot on its inner half which does 

 not, however, reach to the inner (proximal) end of the pteros- 

 tigma. Membranule whitish. 



Front wings: 12 antenodals, 7 postnodals, 6 marginal cells in 

 the posttriangular field. Area between costa and median vein 

 from base to pterostigma, the submedian space, apex of the wing 

 from the i^terostigma distad, and small areas above the hyper- 

 trigonal space and between the subnodal and principal sectors below 

 the nodus — brownish yellow. Subcostal space from base to sixth 

 antenodal (with slight " overflows " into the costal space), a spot 

 at the nodus from slightly beyond the last antenodal to the first 

 postnodal and from the costa to the median vein, and the area 

 between the sectoi's of the arculus from their origin to the level of 

 the triangle — blackish. 



Hind wings: 9 (R) 8 (L) antenodals, 9 (R) 8 (L) postnodals, 

 10 (R) 12 (L) marginal cells in the posttriangular field. Sub- 

 costal (and adjoining part of costal) space to the third antenodal, 

 the submedian space to beyond the cross- vein, the tip of the wing 

 from the distal end of the pterostigma — brownish yellow. A black 

 streak in the subcostal space from the base to the first antenodal. 



Total length 33 mm., abdomen 21, front wing 28, its greatest 

 width (at the nodus) 6; hind wing 26, its greatest width (at the 

 fifth antenodal) 8; pterostigma 4, third tibia 4.5, superior appen- 

 dages 1.75. 



