xxxiii, '22] ENTOMOLOGICAL NEWS 67 



is the season of many other primitive Odonata, and, perhaps, 

 by its retiring habit of life in woods-swamps where are not 

 found many of the more specialized Odonata which enjoy the 

 fierce strife of open ponds. Its general distribution through 

 the wooded Appalachian region agrees with the distribution 

 of other very primitive Odonata (Tachoptcry.v, Cordulcgastcr, 

 etc.). 



Group 2. Foliata Kirby. PI. IV, fig. 2. Mexico to Panama, in 

 zone 4 of Calvcrt (B. C. A. Neur., p. xxiv). March to July in small 

 swampy places. 5 



A casual inspection of the plate shows at once that this is the 

 most primitive member of the line of species terminating in 

 licrcula;. However, it is so little differentiated as compared 

 to the other three members of this series that it has been placed 

 in Level I. Foliata is primitive in its smaller size, its ante- 

 humeral stripes, its lack of a distinct red coloration and in its 1 

 distribution, for in zone 4 as outlined by Calvert 6 are found 

 such primitive Odonata as Xanthostigm-a, Cora, Paraphlcbia, 

 Cordulegaster, etc. These are temperate species that appar- 

 ently cannot stand the winter temperatures of the same faunal 

 zone farther north. Hill 7 and Bray, 8 as mentioned by Calvert, 

 suggest that the islands of zones 3 and 4 were connected and 

 supported a continuous fauna in the Tertiary. At that time 

 Mexico was a peninsula that had not been connected with 

 South America since the Cretaceous and with its stable climate 

 it has harbored these early Tertiary species to the present time. 



Group 3. Angelina Selys. PI. IV, fig. 3. Japan. Habits un- 

 known. 



Angelina is primitive in its full quota of three spots in the 

 wings and in its penis whose only specializations are the length- 

 ened lateral lobes and widened cornua. Its distribution con- 

 firms this diagnosis as Japan contains several very old Odonates. 

 Being an island in a great ocean stream, its climate has prob- 

 ably been very stable and mild. The nearest modern relative 

 of aiif/i'lina is 4-macnlata. 



5 From notes supplied by Dr. Calvert. 



6 Proc. Acad. Nat. Sci., Phila., Oct., 1908, pp. 475-478. 



7 Bull. Mus. Comp. Zool. xxxiv, pp. 205-207, 1899. 



8 Science, Nov. 9, pp. 709-716, 1900. 



