CALVERT: ODONATA OF PARAGUAY, 



27 



Fig. 2. Profile view of 

 oiitei- side of the left 

 appendages of AcantJia- 

 [jrion latapistylum, o ii. 

 sp., seen ohliquely from 

 above. 



The superior and in- 

 ferior appendages toucli 

 eacli other. X 60. 



concave; on tlie inner surface of the appendage is aii anteapical 

 groove running obliqnely iipward and backward. 



Inferior appendages as long as tlie lower margin of the supe- 

 riors, yellow at base whence they taper to 

 the slender black apex which is curved 

 upward toward the superior. 



9 . Similar, palé colors duller. Dorsum of 

 abdominal segment 8 metallic green, of 9 

 palé with a metallic green spot each side 

 at base half as long as the segment, of 10 

 palé. The black on the femora replaced by 

 dusky blotches. Ventral apical spine of 8 

 well developed. Abdominal appendages one- 

 third as long as 10, obscure, diisky. 



cf 9 • Inferior sector of the triangle sepa- 

 rating from the hind margin of the wing a 

 short distance heyond the submedian cross- 

 vein on all four wings. Front wings with 

 the npper side of the quadrilateral one half 

 (cf) or one-third ( 9 ) as long as the lower 



side, three antenodal cells, 10-11 postnodal cross-veins, nodal sec- 

 tor arising near (in front of or beyond) the 

 fifth. Hind wings with the upper side of the 

 quadrilateral two-thirds (cf), or half (9)7 

 as long as the lower side, three antenodal 

 cells, 8 (c?') or 9 (9 ) post-nodal cross-veins, 

 nodal sector &rising at the fourth. Pteros- 

 tigma rhomboidal, costal side slightly the 

 longest, outer side slightly convex, surmoun- 

 ting a little less than one cell, similar 011- 

 front and hind wings, dark brown (cf ) or 

 luteous ( 9 )? with a palé line just within the 

 enclosing veins. 



Total length cf 30 mm, 9 31 mm. Ab- 

 domen cf 24,5, 9 26,5. Hind wing cf 15,5, 

 9 17. 



From the previously described species of 

 Acanthagrion , latapistylum differs as fol- 

 lows : The separation of the inferior sector 

 of the triangle from the wing -margin on all 

 the wings being beyond the submedian cross-vein, distinguishes 



Fi(j. 3. Profile view 

 of inner side of right 

 appendages of Acantha- 

 grion tatapistyhnn n. sp. 



The superior appen- 

 dages has been raised; 

 the solid line on its sur- 

 face shows the upper 

 edge of the anteapical 

 groove, the dotted line 

 the boundary of the pa- 

 lé ante apical spot. X 60. 



