12 E. B. WlIvUAMSON 



1.7 wide at mid-length and 5.6 long; 5, 1.9-2 wide and 5-5.2 long; 6, 2.1-2.4 

 wide and 4.8-5 long ; 7-9 are about as wide as 6, 9 slightly narrower, and 10 

 is about 1.6 wide; in length, 7-10 are, respectively, 3.8-4, 2-2.4, 1.6-1.9, ^ind 

 .8-.9. In profile, at mid-length 4 is about 1.8 high; from this point poste- 

 riorly the abdomen is about the same height to near the apex of 8, the apex 

 of which segment is 2.6-2.8 high. Lateral and ventral carinas on segment 3 

 separated at the apex by about .8, at the level of the point where the lateral 

 meets the median transverse by about 1.2- 1.4; on 4 the lateral carina is about 

 5.2 long and the lateral and ventral carinas are separated by a distance of .6-. 7. 



Venation, male and female. — Antenodals, front wing 13-15 (15 in 14%, 



13 in 21%, 14 in 64%), hind wing 9-1 1 (11 in 14%, 9 in 28%, 10 in 57%) ; 

 postnodals, front wing 9-10 (10 in 35%, 9 in 64%), hind wing lo-ii (11 

 in 14%, 10 in 85%). In front wing usually two rows of cells between A 

 and the hind margin at level of arculus, but in four male wings the distal 

 row of cells (the row against the subtriangle and the postanal cells) consists 

 of three. In the hind wing three or four rows of cells between A3 (/V, of 

 Laidlaw) and the hind margin. In hind wing 4-)- cells between Cu^ and Cu^ 

 from triangle to distal angle of anal loop, except in one female wing, where 

 there are 5 cells. In anal loop 9- 11 cells between A., and A,, (Cuspl and A^ 

 of Laidlaw) (11 in one female wing, 9 in three male wings, 10 in all others). 



Described from four males and one female. El Banco, Colombia, January 

 23-25, 1917; one male, Rio Neuvo, between Magangue and El Banco, Colom- 

 bia, January 22, 1917 (both localities in the lower Magdalena River Valley) ; 

 one female, Tucacas, Venezuela, March 23, 1920 (all above material in coll. 

 E. B. W.) ; and one female, Boa Vista do Jaquiri, near the mouth of the 

 Rio Teffe, Brazil, September 5, 1920, W. T. M. Forbes, coll. Cornell Uni- 

 versity. Type, the male from Rio Neuvo, allotype female, El Banco, January 

 25, 1917. Named in honor of Mrs. M. A. Carriker, Jr. (nee Carmehta 

 Flye), whose courage and industry as a member of ]\Ir. Carriker's expedi- 

 tions in the American tropics merit recognition. 



Specimens of this species have been sent to Drs. Calvert and Ris, and 

 both pronounce it new. Unfortunately, our notes give no particular data as 

 to habits of the species. The male at Rio Neuvo was taken in a bit of dry 

 (at that season) pastured woods. At El Banco we collected a variety of 

 habitats, but most of our material was taken in dry (at that season) woods 

 and brush adjoining the river, and nearly dried up adjacent pools. At 

 Tucacas on March 23 we collected at a large lagoon, possibly an old river 

 bed, lying on the north side of the railroad and between four and five kilo- 

 meters out of town. This lagoon has large areas of deep open water bor- 

 dered at places by more extensive low areas filled with rosette-leaved plants, 

 sedges, grasses, and several species of bushes. At places large areas of this 

 sedgy, brushy marsh were floating on the deeper waters of the lagoon, and 

 about such places, crocodiles were very numerous. The mare solid ground 

 about the lagoon is covered with pastured grass, dense thickets of small spiny 

 trees or shrubs, and forests. Strong flying libellulines are numerous about 

 the margins of the deeper water in the lagoon.' 



