CALVERT: MACROTHEMIS AND ITS ALLIES. 
311 
4. Dythemis constricta (Selys MS.) sp. nov. PI. 1, fig. 16. 
Hagen, Proc. Host. soc. nat. hist., vol. 18, p. 86, no. 2 (no descrip¬ 
tion) . 
£ Face greenish, frons above and vertex metallic blue, lips yel¬ 
lowish, median labial lobe black. Occiput and rear of eyes brown. 
Thorax reddish brown, apparently much discolored, with a slight 
metallic blue reflection. 
Legs black. The 3d tibiae with 14 spines on the anterior (outer) 
row, their lengths being equal to or less than the intervals separating 
them, and 35 shorter spines on the posterior (inner) row. 
Abdomen widest at 2 and at 8 (3 mm.), narrowest at 5 (1.4mm.) 
and at 10 (1.9 mm.), black, marked with reddish yellow as follows : 
greater part of the sides of 2 and 3 except the carinae and sutures; 
a spot on either side, at base, of 4-9, elongate and divided into two 
successive spots, the second larger, on 5 and 6. 
Superior appendages as long as 9, blackish, curved downwards, 
slightly upcurved at apex, thickened before the apex, inferiorly with 
a row of eleven denticles for the greater part of the length of the 
appendage, following the last of which the appendage (viewed in 
profile) is truncated upward and backward to form the apex. Infe¬ 
rior appendage about one-sixth shorter, not reaching quite so far as 
the last denticle, its apex rather wide — half as wide as at base. 
Genitalia: anterior lamina and hamule very prominent, the latter 
more so, its profile resembling the prow of an ancient boat. Ante¬ 
rior lamina somewhat swollen in front, its apex rather narrow and 
rounded. Genital lobe small, slender, forming a fingerdike process 
overlapping the vesicle of the penis. PI. 1, fig. 16. 
Wings somewhat smoky but uncolored. Pterostigma dark 
reddish brown. Reticulation and membranule blackish. Arculus 
between 1st and 2d antenodals. 
Front wings : 11 (L) 12 (R) antenodals, 9 postnodals, the subme¬ 
dian cross-vein on a level with the first antenodal, triangle crossed, 
internal triangle of 3 cells, three posttriangular rows to beyond 
the nodus and 8 marginal cells. 
Hind wings : 8 antenodals, 9-10 jmstnodals, submedian cross¬ 
vein nearer the base than is the 1st antenodal, two posttriangular 
rows (3 cells, then two rows on the right) to the level of the sepa¬ 
ration of the median sector. 
Total length 45 mm., abdomen 32.5, front wing 38, hind wing 37, 
pterostigma 4, hind tibia 9. 
