PHILIP P. CAJ-VERT. 81 



of the triaiiffle forming a liisli curve; 10 margiriril cells l>etweeii the short sector 

 and the first sector of the triangle. One iiy])errrigonal. 



Hind wings with 9 antenodals, 10 (right) 11 (left) postnodals; suhnodal sector 

 not so much waved as the nodal, therefore not entirely parallel, but separated by 

 a single row of cells: triangle free, its basal side very slightly nearer the base of 

 the wing than the ])rolongation of the arculus would be: two (right) three (left) 

 posttriangular cells, then two rows increasing ; sectors of the triangle distinctly 

 separated at origin by .2-. 25 mm. interval; 12 (right)-13 (left) marginal cells 

 between the short sector and the first sector of the triangle ; no hypertrigonals. 

 Membrannle cinereous, only the extreme base, for about .25 ram. in length, white. 

 A very slight, pale yellowish tinge at the base of the wings, most extended oppo- 

 site the membranule where, liowever, it does not reach outward as far as one cell. 



9 (type). Vertex more brownish, occiput brown above. Colors of the pro- 

 thorax and of the sides and ventral surface of the thorax paler, luteous. Pale 

 olive stripe on inner side of the black anteluimeral one not apparent. Mete- 

 pimeric yellow stripe not marked off along its posterior margin from the color 

 of the metepimeron itself. Feet luteous, blackish at knees and on inferior sur- 

 faces of tibiie and tarsi: third tibife with 9 anterior (external), 13 posterior (in- 

 ternal) spines. Shape of the abdomen similar to that of the %, but tlie differ- 

 ences between the widths of the different segments less marked ; color luteous 

 with mid-dorsal and lateral carinaj black, and with pruinoseness apparent on 

 most of the segments; lateral margins of 8 distinctly produced. 



Appendages (right one wanting) longer than 10, not as long as 9, simple, cylin- 

 drical, luteous, apex black, pointed ; anal tubercle about half as long, yellowish. 



Vulvar lamina not produced, similar to that of brachial is us I have described 

 it (Proc. U. S. Nat. Mus. xviii, p. 132.). 



Wings: cross-veins between median sector and upper sector of arculus blackish. 

 Pterostigma as in the left front wing of the % . Fewer double cells between 

 subnodal and next supplementary sector and only one row in the left hind wing. 

 Upper end of arculus between second and third antenodals. The single sub- 

 median cross-vein slightly farther from the base than is the level of the first 

 antenodal. 



Front wings with 13 (right) 15 (left) antenodals, 8 (right) 9 (left) po.stnodals; 

 12 (right) 11 (left) marginal cells between the short sector and the first sector of 

 the triangle; hypertrigonal wanting on the left front wing. 



Hind wings: 10 antenodals; 10 postnodals; basal side of the triangle in the 

 prolongation of the arculus: two po.sttriangular rows from the triangle outward, 

 increasing; sectors of triangle arising from the same point; 14 (right) 12 (left) 

 marginal cells between the short sector and the first sector of the triangle. White 

 at base of membranule twice as great in extent. The yellowish tinge at the base 

 of the wings somewhat deeper and in the submedian space reaching half as far 

 as the level of the first antenodal. 



Total length % 43, ? 45. Abdomen % 29.5, 9 32. Sup. app. % 1.75. App. 

 9 1.3. Third tibia 5-5.5. Front wing % 31, 9 34. Hind wing % 30. 9 33. 

 Pter. % 3.5, 9 3.75. Width of abdomen at base of 3: 3, at base of 4 : 'J, 1.3 9 

 2, at apex of 5 : -^ 2.3, 9 2.5, at 10 : % 1.5, 9 1.75. 



53. L.ibelliila polystiticla B. P. 856. [NeHrocorduHa obsoleta Say.] 

 Von New-Orleans, in v. Winthem's Sammlung'. 

 One male in the M. C. Z. with the pin-kiltels " Wintheiu" printed, 

 " L. polysticta Burm. New Orleans" (written). 



TRANS. AM. ENT. SOC. XXV. (11) SEPTEMBER. 1898. 



