Calvert : Odonata of the Neotropical Region. 199 



Abdominal segments 1-6, 29 mm., hind wing 21.5 mm. 

 Habitat : — Brazil, Chapada, by H. H. Smith, 1 imperfect <$ 

 numbered 190 by the collector. Carnegie Museum, Pittsburgh. 



104. Metaleptobasis cornicauda sp. nov. 



(Plate VI, figs, iio, hi.) 



c?. Dark metallic-blue or green, the following pale yellow : rhinar- 

 ium, genae below the level of the frons, a narrow stripe on the site of 

 the obsolete first lateral thoracic suture not reaching to the wing bases, 

 a shorter similar stripe bordering the lower half of the posterior margin 

 of the metepisternum, these two stripes confluent below with the 

 yellow of the pectus, a dot near the upper end of the sclerite, nearly 

 all the metepimeron (except for a blackish mark in the middle of its 

 lower half), pectus (except for a mid- ventral longitudinal black stripe 

 and a black metasternal stripe bordering the latero-ventral metathoracic 

 carina), much of the ventral surfaces of abdominal segments 1-7 

 (except the hind end of each) confluent with a narrow transverse 

 mid-dorsally interrupted basal yellow ring on at least 4-6, coxse 

 posteriorly and mesially, tibiae superiorly. 



Hind prothoracic margin low, convex, entire, no pro- or meso- 

 thoracic horns. 



Tenth abdominal segment twice as long dorsally as ventrally, its 

 dorsal length half that of 9, middle of the hind dorsal margin pro- 

 duced dorsad and caudad to form a triangular process, best seen in rear 

 view, and then having a rounded tip, but viewed dorsally the tip is 

 bifid. 



Superior appendages stout, in dorsal view a little longer than 10, 

 subparallel, and each of subuniform width in the proximal two-thirds, 

 widened in the distal third, especially on the inner (mesial) side, 

 curved toward each other, apex truncated obliquely from within 

 caudad and laterad. Each appendage is for its entire length concave 

 within and convex without, and in profile view its outline is capitate, 

 the "head " occupying about the distal half. 



Inferior appendages in profile view conical, directed straight caudad, 

 apices acute, and reaching to the level of one-third of the length of 

 the superiors ; in ventral view the acute apices are curved slightly 

 toward each other. 



Third tibia with 6 spines in the anterior (outer) row. 



Wings clear, stigma brown, margined with a pale line inside the bound- 



