406 THE CANADIAN ENTOMOLOGIST 



hairs. Legs somewhat hairy, tarsi bearing two strongly curved 

 claws. Rostrum extending to metathoracic segment. 



Adult. — Length 4 mm., width 2.3 mm. This was described 

 by Gibson as mentioned in the first part of this account. Gibson 

 states in discussing C. juglandis, which is also found on walnut, 

 that both juglandis and parshleyi occur in the type series of jug- 

 landis in the Fitch collection, and that this probably accounts for 

 the more or less vague conception of juglandis Fitch. He states 

 that juglandis is somewhat smaller than parshleyi and has the 

 apical band straight across the elytra, while in parshleyi, the apical 

 band runs obliquely from the costal margin toward the inner 

 margin of elytra and is narrower. Gibson also states that juglandis 

 Fitch occurs throughout New England and south and west to 

 Kansas and Texas, its food plants including walnut, butternut and 

 linden. This means that it undoubtedly occurs in New Jersey, 

 but up to the present we have not been successful in locating any 

 species other than parshleyi on walnut. 



THE VARIETIES OF THE DRAGONFLY, AGRION 



MQUABILE (SAY). 



BY CLARENCE HAMILTON KENNEDY, CORNELL 

 UNIVERSITY, ITHACA, N.Y. 



This living jewel with its metallic green body and crystal 

 wings tipped with jet, flutters before the collector through the 

 shadows of wooded streams from Maine to California, while its 

 awkward nymph may be found crawling through the dense mats 

 of willow and alder roots that hang in the woodland pools. Be- 

 cause of this timid and weak flight of cequahile as well as the rather 

 special environment preferred by the nymphs, this species is 

 seldom continuously spread in any region but is met on those oc- 

 casional streams, which furnish its special requirements in patchy 

 light, and root masses hanging in fairly clear water. As a result 

 of this low ability to spread and th€ distance between broods 

 because of the special environment required, this species has 

 developed several marked varieties.* 



By reference to the plate the reader can see at once the dif- 



*This same tendency to the development of varieties in the weak-flying 

 Agrionine dragonflies is discussed by MacLachlan, "Notes on Odonata collected 

 by Buckley in Ecuador," Trans. Ent. Soc. Lond., 1881, p. 25 

 December, 1918 



