38 PROCEEDINGS MANCHESTER INSTITUTE 



This beautiful little Dragon-fly has a wide range in America, 

 being credited from Maine to Maryland, Colorado, New Mexico, 

 Nevada and California. Male and female in collection. Length, 

 28 ; alar expanse, 45. 



27 Diplax viciiia Hagen. 



Calvert, p. 264; Hagen, Syn. Neur. N. A. p. 175. 



Nearly as abundant as rubicundula, and easily mistaken for it 

 by a careless observer, but readily distinguished by the superior 

 appendages of the male, which have no median, inferior tooth, 

 but bear from 4 to 9 inferior denticles, of which the apical is the 

 largest. Male and female in the collection. Length, 37 ; alar 

 expanse, 53. 



16 Mesotlieniis Hagen. 

 Calvert, p. 225 ; Hagen, Syn. Neur. N. A. p. 170. 



38 Mesotlieiiiis >smii)licicollis Say. 

 Calvert, p. 265 ; Hagen, Syn. Neur. N. A. p. 170. 



This peculiarly beautiful bright-green species is very rare about 

 Manchester, the only individual yet secured being taken at Cohas 

 brook, June, 1899. Female in the collection. Length, 41 ; alar 

 expanse, 67. 



