106 ENTOMOLOGICAL NEWS [April, '22 



This striking dragonfly has the coral-red wings of 

 and the dark body of inccsta. The arguments for its heing a 

 good species and not a hybrid between these species are as 

 follows : 



1. It has not been found elsewhere where the habitats of 

 these species overlap. 



2. It has the composite type one would expect in a species 

 surviving from the Miocene times of Florida. 



3. It is local in its distribution as relict species usually are. 



4. It was breeding and ovipositing. 



The writer is inclined to classify jcsscana as another of the 

 local Florida species. He believes that these originated in the 

 Miocene when north central Florida was an island. As evi- 

 dence of this, all of the half-dozen local Florida species are in 

 northern genera because the Island of Florida was close to the 

 Georgia coast and the Antillean lands had not yet appeared 

 above the sea. The local Florida species of Odonata that the 

 writer has examined are each among the primitive species of 

 its genus, which again suggests an early origin for them. If 

 these conclusions are true, jcsscana gives us a fairly definite 

 geological date for this horizon of the genus Libellula. Scini- 

 fasciata, foliata, and angclina would be from below the Mio- 

 cene, while Group 8 (c) and Group 8 (d) would have devel- 

 oped since the Miocene. The penis of jcsscana has more of 

 its characters like those of the species of Group 8 (d) than of 

 Group 8 (c), but the bright red wings associate it just as much 

 with the latter group. It is specialized in the curious supple- 

 mentary lobe under the cornual base. 



Group 8. (c) Flavida Rambur. PI. IV. fig. 17. Atlantic and 

 Gulf Coasts. Habits unknown. 17 



Auripennis Burm. PI. IV, fig. 17. Atlantic and Gulf Coasts to 

 Cuba and Mexico. A species of the ponds of the southern ever- 

 green forest, which has penetrated the tropics as far as the Isle of 

 Pines and Tabasco, Mexico. 



Luctuosa Burm. PI. IV, fig. 19. Maine and Florida to North 

 Dakota and northern Mexico. A pond and sluggish stream species 

 of the deciduous forest and prairie. 



[ 17 In the pine barrens in New Jersey. P. P. CALVERT.] 



