612 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



from the condition found normally in Thaumatoneura and several 

 calopterygine genera with reduced venation in which the added 

 number of antenodals confined to the first series are apical to the 

 specialized and strengthened 2 continuous antenodals. 



Normally the 4-sided subquadrangle is joined by a single short 

 cross-vein (part of A) to the posterior wing margin, but in all the 

 material before me 1 front wing and 2 hind wings of males of paulina 

 _have this area 5-sided, with 2 short cross-veins to the posterior wing 

 margin. One front wing and 1 hind wing showing this character 

 were the left wings of 1 individual. 



The apices of the wings of all the females and of the male of naihalia 

 are without trace of dark color. Wings of both sexes except very 

 teneral individuals and the male of naihalia show more or less whitish 

 opalescence, especially on the hind wings and especially beyond the 

 nodus. Since the female of naihalia shows this opalescence it may be 

 expected in the male, but the single specimen I have shows only a 

 narrow margin of it about the stigma. 



The apical brown on the wings of males of paulina is ontogenetic; 

 teneral males show no trace of it, and in the most mature specimens I 

 have it is most extensive and darkest in color. My material is largely 

 teneral, and the following data relating to the 27 males indicate this: 



Apices of wings without trace of dark color, 13 individuals. 

 Apices of wings beyond stigma slightly fumose, 6 individuals. 

 Apices of wings beyond stigma fumose, 4 individuals. 

 Apices of wings beyond middle of stigma fumose, 3 individuals. 

 Apices of wings from level of stigma black, 1 individual. 



In view of the ontogenetic character of this wing marking it remains 

 to be seen if angelina, as determined by Doctor Calvert, 1 is distinct 

 from paulina. 



Male abdominal appendages. — In the entire series of paulina 

 examined there seems to be no noteworthy variation. The superior 

 appendage on its ventro-internal edge is squarely narrowed, at a dis- 

 tance from the apex less than the width of the appendage at this 

 point, for slightly more than half the width of the appendage, the 

 supero-external edge opposite this cut-out being convex and con- 

 tinuous to the apex. The outline shown in most dorsal views differs 

 from Doctor Calvert's 2 figure 40, therefore, in that the inner subapical 

 emargination is more marked, the inclosed angle being nearly a right 

 angle, rather than a very obtuse angle. In addition to the spine on 

 the supero-external edge of the superiors, as shown in Doctor Cal- 

 vert's figure, there is on the same edge a similar smaller spine, placed 

 slightly closer to the apex than to the basal spine, the edge between 

 the spines being concave. The basal spine is not quite so heavy as 



1 Biologia Centrali- Americana, Odonata, p. 136, February, 1903. 



2 Idem, pi. 5. 



