CALVERT: MACROTHEMIS AND ITS ALLIES. 
321 
Front wings: 12-13 antenodals, 6-7 postnodals, internal triangle 
of one cell, two posttriangular cells to the level of the nodus increas¬ 
ing to 4 marginal cells. 
Hind wings: 9 antenodals, 7-9 postnodals, two posttriangular 
rows (or first one cell due to the first cell of the lower row extend¬ 
ing up to the outer angle of triangle) to the level of the origin of 
the subnodal sector, increasing to 9-10 marginal cells. The right 
hind wing of the Panama female has the posttriangular field thus 
1 .1 .2 .1 .2 .2 .2 .3.4-. 
Total length 32 mm., abdomen 24, hind wing 27, its greatest 
width 8-9, pterostigma 2, appendages .6, hind tibia 4. 
One female, Chiriqui, Staudinger, one female, Panama, both in 
Mus. Comp. Zool. 
3. Macrothemis tessellata Burm. 
Libellula t. Burmeister, Handb. ent., vol. 2, p. 849, 1839. 
$ Vertex truncated at tip, metallic blue; frons above metallic 
blue, below yellow, as are the clypeus and labium. Labrum, occiput, 
and rear of eyes metallic blue or black, or with a pale green spot at 
middle of base of labrum and on rear of eyes. Eyes in contact for 
1.5 mm. or 1£ times the length of the occiput. Prothorax dark 
brown, hind lobe narrower than the others, its shape that of a small 
segment of a circle, its hind margin entire. Thoracic dorsum dark 
brown with a pale green antehumeral stripe each side whose width 
is equal to the distance from mid-dorsal carina to humeral suture. 
Sides and pectus yellowish, a complete dark brown stripe on each 
of the 1st and 2d lateral sutures. 
Feet blackish brown, first femora in great part, especially interiorly, 
luteous. Hind tibiae with 11-12 spines on the anterior (outer) 
row, 14-15 on the posterior (inner), all long and slender. Tarsal 
nails toothed before the tip, tooth decidedly shorter than tip of nail 
itself. 
Abdomen slightly wider at 2 and at 9, compressed at base and 
depressed at apex, black, each side of dorsum of 1-7 with a row of 
linear pale green spots, two to each segment as far as 6, one on 7; 
inferior tergal margins of 3-7 greenish. 
Apps. black, straight, slender, as long as 10. Vulvar lamina with 
a very small median notch of more than 90°. 
Wings clear, apex dark brown beginning half way between nodus 
and pterostigma for the entire width of the wing, many of the cells 
clearer in their centers. H. W. with a yellow tinge at extreme base 
