CALVERT: MACROTHEMIS AND ITS ALLIES. 
325 
and rounded apex which is not cleft, hamule nearly twice as promi¬ 
nent, slender, apex curved to form a hook, genital lobe the least 
prominent, hardly longer than wide, tip rounded. 
Wings with a faint yellow tinge in their basal half near the 
anterior margin, with a deeper yellow cloud at the extreme base to 
about half way to the first antenodal. Pterostigma reddish brown, 
membranule whitish. 
Fore wings: 15 antenodals, 8 Ii 7 L postnodals, internal triangle 
of two cells, two posttriangular rows to the level of the nodus, 
increasing to 4-5 marginal cells. 
Hind wings: 10 antenodals, 9 postnodals, two posttriangular 
cells, the upper of which reaches across the entire width of the 
field, then one row for one (left) or two (right) cells, followed by 
two rows increasing to 12 marginal cells. 
Total length 39.5, abdomen 28, hind wing 28.5, its greatest 
width 8, pterostigma 2, sup. app. 1.7, hind tibia 5. 
The male type, Brazil (Mus. Comp. Zool.). 
The differences between the markings on the sides of the thorax 
and on the abdominal segments given by Hagen as existing between 
this species and celaeno do not hold now that specimens of celaeno 
from Hayti agree with pleurosticta in these respects. The chief 
differences are those given in the analytical table. 
9. Macrothemis celaeno Selys. PI. 1, fig. 3. 
Libellula c. Selys in Sagra’s Ins. Cuba, p. 454, 1857. JI. c. 
Hagen, Proc. Bost. soc. nat. hist., vol. 18, p. 76, 1875. 
The two posttriangular rows on the front wings extend out to 
the level of the nodus, increasing to 4-6 (in 1 wing only of two £ 
7) marginal cells, an additional cell is occasionally to be found 
inserted between those of the upper and lower rows before the 
level of the nodus, thus making three cells at the place of such 
insertion; in two Cuban individuals, one male, one female, and one 
Jamaican male, on the right wing only in each case, there are three 
posttriangular cells immediately next to the triangle, after which 
follow the tw r o rows. 
On the hind wings the two posttriangular rows extend usually 
to the level of the separation of the median sector; these two rows 
may be interrupted by a single cell reaching across the entire width 
of the field even in Cuban males, this cell being (as in other indi¬ 
viduals of celaeno and in other species of Macrothemis) the upper of 
the two immediately after the triangle; two males from Cuba by 
