1920] Howe — Odonate Fauna of Concord, Mass. 155 



having taken one at Moultonboro, N. H., on July 9, 1916 (see 

 Psyche 24: 51, 1917), and a specimen has since been sent me taken 

 at Dedham, Mass., by Miss Eleanor Clark on June 14, 19)20. Dr. 

 Needham I find also records its capture at Wellesley, Mass. (see 

 Bull. 111. State Lab. Nat. Hist. 6:34, 1901). 



Tetragonenria canis MacLach. Seven males taken on May 31 

 and June 2, 1920, at a small pond near the township border of 

 Carlisle. The fourth New England record, — having been taken 

 at Franconia, N. H., by Mrs. Slosson; at Jaffrey, N. H., by Mr. 

 C. W. Johnson; and in Connecticut based on an undated and un- 

 stationed specimen in the collection of the Connecticut Agricultural 

 Experiment Station at New Haven. This species only represented 

 by males was almost common at this little pond on both dates. 

 The pond is one that I have visited every year regularly at this 

 season for the past five or six years. All the other species found 

 flying there were ones always noticed before. I am wondering 

 whether the nymphs of T. canis transform everj^ year or whether 

 the larval stage may cover several years. x\n explanation of the 

 presence of the species at the pond this year seems difficult to 

 explain on other grounds. 



R. Heber Howe, Jr. 



Thoreau Museum of Natural History. 



