154 The Ohio Naturalist. [Vol. X, No. 7, 



while of 16 wings of moiwmelaena examined only a single wing 

 has 2 crossveins, all the others having but 1 . x'ilso, 6 wings of 

 fasciata have 4 posttrigonal cells, and 2 wings have 5. On the 

 other hand 9 wings of monomelaena have bi:t 3 cells, although 

 7 wings have 4. 



3. Kirby's figure shows the first row of cells, proximal to the 

 postanal cell, between A and posterior margin of wing in front 

 wing as 3 cells wide. In the Louisiana specimens this is true 

 for 7 wings, while 1 wing has 2 cells; in 16 wings of monomelaena 

 examined these are invariably 2 cells. (Kirby figures the post- 

 anal as a single cell. This is undoubtedly an error. My material 

 shows it 2 or 3 celled.) 



4. Kirby mentions the enclosed basal pale area in the hind 

 wing as being yellowish or yellow, though his figure does not 

 show this. The accompanying half tones show this character 

 clearly in the Louisiana specimens. It is entirely lacking in 

 monomelaena, whence the specific name. 



5. In fasciata as described and figured the colored area just 

 proximal and posterior to the nodus in the front wing extends 

 posteriorly across Cuj. This is true of all the Louisiana speci- 

 mens. In nwuonielacua on the other hand this dark area in its 

 maximum development is limited posteriorly by the median 

 supplement. 



So much for the identification of fasciata. Other characters 

 point to the specific distinctness of monomelaena and fasciata, 

 though unfortunately I ain unable to find such characters else- 

 where than in the wings. Two venational characters are of 

 interest: the number of cells between A^ and A3 in the hind wing 

 and the number of cells on the posterior margin of the hind 

 wing from the base of the wing to the anal loop. In both of these 

 characters fasciata has a greater number of cells than monomel- 

 aena, and in both species in the case of the first character the 

 female has more cells than the male, while in the second charac- 

 ter the male has more cells than the female. These characters 

 may be tabulated: 



Number of cells between A^ and A^ in hind icitig: 



fasciata male, one wing 11, two 12, one 14; average 12.25. 

 female, three wings 15, one 17; average 15.5. 



monomelaena male, three wings 9, two 10; average 9.4. 



female, two wings 9, four 10, two 11, one 12, 

 one l."]; average 10.5. 



Number of cells on posterior margin of hind iving from the base 

 of the wing to the anal loop: 



fasciata male, one wing 32, two 34, one 35; average 33.75. 

 female, two wings ."51, two ;]3; average 32. 



