34 PROCEEDINGS MANCHESTER INSTITUTE 



7. Tetragoneuria Hagen. 



Calvert, p. 223 ; Hagen, Syn. Neur. N. A. p. 140. 



11. Tetragoneuria seniiaqiiea Burmeister. 



Calvert, p. 252 ; Hagen, Syn. Neur. N. A. p. 140. 



Smaller than Macromia illinoensis and distinctly marked, but 

 with the same Corduline, thicket-haunting characteristics. The 

 station for Tetragoneuria near Manchester is in the woods be- 

 tween the Stevens Pond road, beyond Youngsville, and Bald Hill. 

 There is a pool here in which they breed, apparently without com- 

 petition with other Dragoivflies. The adults emerge the last of 

 May and soon scatter through the woods, choosing spots where 

 the sunlight shimmers through the branches. Here they dart for 

 their insect prey, as does Macromia, and are similarly persecuted 

 by the birds. During the severe drought of 1899 the pool was 

 dried up for a considerable period, and it will be of interest to note 

 what effect this circumstance may have upon the species at this 

 station. It is known that some species of Dragon-flies have the 

 power of lying dormant under similar conditions, and it is certain 

 that this particular pool must have been dried in many seasons 

 previous to 1899. Male and female in collection. Length, 2^ ; 

 alar* expanse, 58. 



8. Neiirocorclulia Selys. 



Calvert, p. 223. 



13. IVeurocorclulia obsoleta Say. 

 Calvert, p. 252. 



A beautiful species, distinguished by the small spots on anti- 

 cubitals, two cross-veins beneath the pterostigma, and the slightly 

 produced, rounded apical margin of tenth segment. One male. 

 Length, 52 ; alar expanse, 74. 



9. Soiiiatoclilora Selys. 



Calvert, p. 223. 



13. Soiiiatoclilora lepida Hagen. 

 Calvert, p. 253. 



