1916] Iloire — A Preliniinarij List of (he Odonaia of Concord, Mass. 13 



dent, Mr. E. I>. Peirson, Jr., collected on occasional afternoons from 

 April until early June, and his material was determined through 

 the kindness of Dr. P. P. Calvert. Mr. Peirson pubUshed in the 

 Proceeding of this Museum (Vol. I, p. 41, 1915) a list of twelve 

 species, a few of which had been collected preceding his work and 

 which had been determined by Mr. C. W. Johnson. IVIr. Peirson 

 published this list largely because he had secured the second cap- 

 ture of Williamsonia linineri in New England (see also Ent. News, 

 26, p. 238, 1915), a species never before recorded from these .states. 



During the past summer, because of continued residence in 

 Concord, I have had the opportunity to collect almost daily, and 

 have visited practically all the ponds and the river valleys, with 

 the result that I am now able to publish a considerable list of 

 species. No doubt further collecting in April and May will add 

 many species in the Gomphinae. Throughout the summer I had 

 the help of my daughter, Miss Susan A. Howe, and in my deter- 

 minations I have had the continual aid of IVIr. Edward B. Will- 

 iamson, and also occasionally that of Mr. Richard A. Muttkowski 

 and Dr. E. M. Walker. To these gentlemen I extend my sincere 

 thanks. 



In the present list I have made my comparisons of distribution 

 with Dr. Calvert's List of the Odonaia of New England (Occas. 

 Papers Bost. Soc. Nat. Hist., 7, 1915). 



ZYGOPTERA. 



AGRIONID^. 



CALOPTERYGIN^. 



1. Calopteryx mquahilis Say. Collected by Peirson. cf . May. 



2. C. maculata (Beauvois) Burm. Common, cf' and 9 s. May to August 19. 



LESTIN^. 



3. Lestes eurimis Say. Common, d^ and 9 s. July. 



4. X. cowjre??er Hagen. Not uncommon, cf and 9 s. September 5 to 30. New 



to Massachusetts. 



5. L. disjuncfus Selys. Three specimens, cf. September 5 to 18. New to 



Massachusetts. 



6. L. unguiculatvs Hagen. Very common, cf and 9 s. August 15 to Septem- 



ber 5. New to Middlesex County. 



7. L.forcipahis1{a.mbuT. Rather uncommon, cfs. August 31 to September 5. 



8. i. n^i'/a-T Hagen. Rather uncommon, of and 9 s. August 15 to September 



5. New to Middlesex County. 



9. L. redan gularis Say. Uncommon, cf and 9 s. August 23 to September 15. 



