Vol. 6, p. 73-76. pL 6. April 7, 1924. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



NEW EPHEMERIDAE FROM NEW ENGLAND.* 



BY JAMES McDUNNOUGH. 



The study of a small but interesting collection of Ephemeridae ' 

 submitted to me for identification by Mr. C. W. Johnson of the 

 Boston Society of Natural History has resulted in the discovery of 

 several undescribed species, descriptions of which are herewith 

 presented. 



Leptophlebia johnsoni, sp. nov. 



Male. — Head and thorax rather bright black-brown, especially laterally. 

 Abdomen with segments 2-7 translucent white, segment 2 tinged with pale 

 brownish; spiracles marked by small black dots with faint brown shades above 

 them; segments 8-10 (and often the posterior dorsal portion of 7) opaque, 

 dorsally brown; segment 9 edged laterally with pale creamy, ventrally seg- 

 ment 8 pale creamy, segment 9 pale brown; forceps pale creamy with light- 

 brown subgenital plate; setae white, narrowly ringed with brown; a medio- 

 ventral row of light-brown patches on hyaline segments. Fore legs deep 

 brown, with tip of tibia darker, four posterior legs pale golden brown. Wings 

 hyaline with a faint but distinct pale umber shade in the apical area of fore 

 wing; venation faint with the veins and cross-veins of apical area brownish. 



Female. — Deep brown with red-brown shading on vertex of head; legs paler 

 brown. Last ventral segment bilobed, the lobes pointed but the excavation 

 between them rather shallow (less than haK the length of segment) and gently 

 rounded apically. Wings without apical cloud. Length of body and fore wing 

 7 mm. 



Holotype. — (^, Jaffrey, New Hampshire, June 21 (C. W. Johnson); in the 

 collection of the Boston Society of Natural History. 



Allotype. — 9 J Jaffrey, New Hampshire, June 25, in the same collection. 



Paratypes. — 2(^, same data as holotype; No. 772, in the Canadian National 

 Collection, Ottawa. 



Apart from the apical cloud on the primaries of the male, the 

 species is readily distinguished from L. mollis and its allies by the 

 form of the male genitalia (PL 6, fig. 1). 



Ephemerella temporalis, sp. nov. 



Male. — Eyes (living) ferruginous yellow; head deep yellowish; thorax rather 



bright brown, slightly olivaceous dorsally, with a paler, orange-yellow streak 



from the wing roots to pronotum and with pale creamy shades on the pleura 



at the base of the wings. Abdomen dorsally with segments 2-7 deep brown, 



^ Contribution from the Division of Systematic Entomology, Entomological 

 Branch, Department of Agriculture, Ottawa, Canada. 



