of Ecuador arid Bolivia. 87 



size Is very slightly smaller (posterior wing 29 mm.). 

 The opaque white portion of the wing less extended in- 

 wardly, and somewhat creamy; in one example the dark 

 band is narrower, and in the anterior wing finishes abont 

 four cellules before the pterostigma, hence the hyaline 

 apical portion is somewhat more extended. 



Euthore mirabilis, n. sp. 



Nodus somewhat nearer to the base than to the ptero- 

 stigma, which is brown, much dilated and surmounts 

 9 — 13 cellules; 43 — 50 antecubital and 51 — 54 post- 

 cubital nervules in the anterior wings. 



$. Wings dilated in the middle; the base up to some- 

 what beyond the end of the quadrilateral, and the costal 

 margin up to the nodus, smoky-hyaline ; the apical border 

 from beneath the pterostigma smoky-brown; oil the rest 

 of the loing dark opaque orange-red {or vermilion), the 

 outer edge of this portion extremely oblique. Labrum 

 with two large brownish-yellow spots, a spot on each 

 cheek, and four between the eyes, of the same colour. 

 Prothorax with two large spots, and the lateral margins, 

 of the same colour. Thorax with six brownish-yellow 

 lines on either side. Legs black; the femora brownish 

 internally. Abdomen bronzy -black, paler towards the 

 base ; segments 1 — 4 with a brownish -yellow line on each 

 side, and a vestige of the same on the fifth. 



$ . Wings hyaline, tinged with smoky-brownish ; in 

 the anterior Avings there is a large (nearly equilateral) 

 triangular opaque orange -red spot placed so that the 

 nodus is above the middle of its base (the costal margin 

 remaining hyaline), externally with a narrow smoky line 

 not touching its edge in very mature individuals; in the 

 posterior wings there is a similar spot, but the colour 

 is changed to reddish-brown, margined externally by 

 smoky-brown; the other characters as in the S. 



Length of abdomen: $, 38 — 42 mm.; $, 34 — 35 mm. 

 Length of posterior wing: $ , 28 — 32 mm.; 2, 33 mm. 

 Expanse: ^,62 — 68 mm.; $,69 — 70 mm. 



Hab. — Intaj, Ecuador, 6 <? and 6 2, all mature. 



Although there are other Odonata that, through the 

 presence of metallic colours, may rival this in beauty, 

 there exists, so far as I knoAv, none with the same deep 

 opaque orange-red coloration. 



