Calvert: Odonata of the Neotropical Region. 211 



Rio de Janeiro, November, 4J 1 , 2 ?; Chapada, 3 <S" (no. 139) ; 

 Cuyaba, 2 ^ ; Cachoeira, flooded campo, January 26, 2 cT (no. 18), 

 1 citron $ (no. 7) ; Cachoeira, 1 orange $ (no. 37) ; all by H. H. 

 Smith. Carnegie Museum, Pittsburgh. 



112. Palaemnema dementia Selys. 



Habitat : — Colombia, Bonda, in Dept. Magdalena, July, by H. H. 

 Smith, 1 c?. Carnegie Museum, Pittsburgh. 



113. Peristicta aeneoviridis sp. nov. 

 (Plate VI, fig. 124. ) 



cT» Head black ; labium, a narrow stripe bordering the eyes inferi- 

 orly, extreme anterior margin of labrum and rhinarium yellowish ; 

 genae inferiorly pale blue. 



Prothorax and thorax metallic-green, inferior parts of mesepimeron 

 and of metapleuron and pectus yellow, a very narrow black stripe on 

 the mid-dorsal thoracic carina ; hind lobe of prothorax low, its pos- 

 terior margin convex. 



Abdomen dark metallic-green, becoming black on the posterior seg- 

 ments ; very small yellowish spot on each side of the base of 4-6. 

 Hind margin of 10 very slightly emarginated mid-dorsally, not elevated. 



Superior appendages moderately forcipated, twice as thick in the 

 proximal as in the distal half, bearing at mid-length a stout triangular 

 infero-internal tooth not as long as half of the appendage ; in profile 

 view the appendages are straight, directed upward, tapering (except 

 for the tooth which is less visible than in dorsal view) from base to 

 apex. Inferior appendages rudimentary. 



Legs black ; coxae, trochanters, extreme bases of femora, and upper 

 surfaces of tibiae yellow ; tarsi pale brown. Hairs or spines shorter 

 than the intervals separating them, third femur with 4 (longer) on 

 the outer row, seven (shorter) on the inner row ; third tibia with 6 

 (longer) on the outer, 12 (shorter) on the inner row. 



Wings slightly smoky toward the apex ; stigma surmounting less 

 than one cell, its distal edge more oblique than the proximal on the 

 front wings. Front wings with 11-12 postnodals ; Cu t ( = superior 

 sector of the triangle of de Selys) terminating i 1 \ 2 to 2 cells distal to 

 the vein descending from the nodus; M 2 ( = nodal sector) arising at the 

 fourth postnodal ; M la ( = ultra-nodal sector) at the sixth or seventh. 



