Calvert : Odonata of the Neotropical Region. 87 



Superior abdominal appendages longer than 10, almost as long as 9, 

 forcipate, black, with a small superior basal orange spot, with 6-8 

 spines on the outer margin in the apical half. In dorsal view, the 

 inner margin is slightly and convexly enlarged in the proximal third ; 

 and from one third to four-fifths' length is again widened into a large 

 trilobed or tridentate prominence, the first or most proximal tooth 

 or lobe being rounded at tip and situated at one-half the appendage- 

 length, where the appendage reaches its maximum width ; the second 

 is more rectangular at tip and at five-sevenths of the appendage length ; 

 the third, also rectangular, is at about four-fifths' length, less promi- 

 nent, but at a higher level than the other two ; the upper surface of 

 the appendage bears an oblique row of a few denticles above the proxi- 

 mal tooth or lobe of these three and running towards the second tooth ; 

 apex of the appendage obtuse, rounded. 



Inferior appendages black, reaching to three-fifths of the length of 

 the superiors, tapering gradually to the apices, which are slightly 

 curved toward each other and minutely bidentate. 



Legs black, except the coxae, which are pale brown with some black 

 spots ; in one a pale line on the inner surface of the third femur. All 

 wings pale yellowish between the costa and R x (= median vein of 

 de Selys), and with a red spot at the tip between the distal ends of 

 R t and M^ and M ]c or M and extending proximad 5-9 cells posterior 

 to M 16 , a little mere densely reticulated than adjoining areas. Red at 

 the base of the front wing occupying the area between R (= median 

 vein of de Selys) and the hind margin from base to about 5-7 cells 

 distal to the quadrilateral ; it also fills the subcostal area for the same 

 distance, or for the first 6-1 1 antenodals, and narrowly borders the 

 posterior edge of the costal space for the first 3-13 antenodals; the 

 length of the red area from wing-base distad is 6.5-7.5 mm., or a 

 little less or more than half the distance (13 mm. ) from base to nodus. 

 Red at the base of the hind wing occupying the area between costa 

 and anal veins (at which latter it may stop sharply or invade the first 

 row of cells below), from base to apex of quadrilateral whence its 

 distal margin extends forward and outward to a point on R x (= me- 

 dian vein of de Selys) situated at about five cells distal to the level of 

 the apex of the quadrilateral and 7.5 mm. from the wing-base, whence 

 it again retreats towards the base through the subcostal and costal areas, 

 in which two areas the red is paler and mixed or alternated with brown. 



Median space of both front and hind wings, and often also the 



