76 burmeister's ooonata. 



their length, on the basal side of wliich is a row of 3-4 denticles: apex acnte. 

 Inferior appendage but little shorter, triangular, extreme apex truncated, with the 

 usual two upturned denticles. 



Genitalia of 2: Anterior lamina haixlly projecting beyond the lateral margins 

 of 2. Hamule bifid, inner branch slender, hook-like; outer branch longer, wider, 

 lamellate, apex obliquely truncated from within outwurd and ventral ward. 

 Genital lobe much more prominent than the preceding parts; apex truncated 

 from behind forward and ventral ward, wider than the base, and in contact with 

 that of its fellow of the ojiposite side so that the two genital lobes form a sort of 

 hood for the liamules. (PI. I, fig. 10). 



Wings: — Pterostigma luteous surmounting one and parts of two other cells, 

 membranule cinereous, reticulation lilackish. Sectors of the arculus stalked, no 

 hypertrigonais, one subnjedian cross-vein, nearer the base than is the first ante- 

 nodal, nodal sector not waved, only one row of cells between the subnodal sector 

 and the supplementary sector next below. 



Front wings: — Upper end of arculus between first and second antenodals, 10 

 antenodals, the last not continued to median vein, 8 postnodals, internal triangle 

 3-celled, discoidal triangle with one cross-vein ; three posttiiangular rows for two 

 cells, then two rows for four cells, then three rows (beginning near the level of 

 the last antenodal) almost to the wing-margin : this corresponds to the strongly 

 pronounced curving forward of the first sector of the triangle, which reaches its 

 maximum at the level of the point of separation of the principal and median 

 sectors. Base of the wings yellowish-brown for almost their entire width and 

 reaching outward to the first antenodal, the arculus and the inner (basal) side of 

 the internal triangle. 



Hind wings: — Upper end of arculus almost at the second antenodal, 8 ante- 

 nodals, 8 (right) 9 (left) postnodals, no internal triangle, discoidal triangle free, 

 two i)osttriangular rows increasing, sectors of the triangle arising from the same 

 point. Base of the wings yellowish-brown, reaching outward to the fourth ante- 

 nodal and the apex of the triangle; as in the front wings the central part of 

 eacrh cell is clearer, whence Burmeister's " tessellatis". 



Total length 30 mm. Abdomen 19. Superior appendages 1.3. Third tibia 5. 

 Front wing 24. Hind wing 23. Pterostigma 3. 



Hagen's cojiy of B. having a * — opposite this name is the reason for men- 

 tioning a specimen (abdomen lost, i)ut prol)ably a female from the small amount 

 of color on the wings) in the M. 0. Z.. iiaving the written pin-label "L. puUa 

 Br. Surinam" in an unknown hand, and a modern type label. It diflfers from 

 the above description in having on the front wings 9 antenodals, two rows of 

 posttriangular cells from the triangle to the level of the nodus, pale yellow at 

 base to not quite as far as the submedian cross-vein. 



Hind wings with 7 antenodals, 7 postnodals, j)osttriangular cells 2.1.1 2-{-- 

 (right), 2.1.2+. (left) (i.e. between short sector and the first sector of the triangle) ; 

 sectors of the triangle separated at origin ; base of the wings pale yellow to the 

 level of the first antenodal. 



Length of head and thorax 8.5, front wing 19, hind wing 18, pterostigma 2. 



Should this female be not conspecific with the al)ove male, the male is of course 

 fixed as the type by the ueuration in the posttriangular field mentioned by B. 



