WM. G. DIETZ, M.D. 27 



Hab. — Penna. (Hazleton, Charleroi), Can. (Toronto), Md. 

 (Plummer's Island). 



Seven specimens, two cf cf and five 9 9 , are before me. 

 Closely related to H. aphidiella, from which it is distinguished 

 by its uniform dark brown color of forewings and absence of 

 discal spots. 



Var. basipallidella differs from the typical form by the 

 basal two-fifths of the forewing being somewhat paler than 

 the rest of the wing, this paler space is irregularly angulated 

 externally, and the first discal spot is situated on its edge ; 

 the two spots at end of cell are generally distinct, and the 

 immediate space surrounding them a trifle paler. Expansion 

 16.0-18.0 mm., 0.64-0.72 inch. 



Hab. — Penna. (Hazleton), Mass. (Cohasset), New Hamp. 

 (Hampton). 



Both the typical form and the variety lack entirely the 

 white tipped scales of aphidiella. 



2. H. aphidiella Wish. — " Antennas strongly notched beyond the 

 basal joint, the basal extremity of the notch very plainly indicated by 

 a truncate patch of scales from the lower margin of which the slender 

 bent stem continues ; beyond this they are biciliate three-fourths ; 

 basal joint with a strong scale-pecten ; tawny-gray. Palpi slender, 

 pointed, slightly recurved reaching, beyond the basal joint of the 

 antennae, the terminal joint nearly as long as the median ; brownish 

 cinereous, the median joint darkened externally. Head and thorax 

 with an iridescent greenish lustre ; tegula? tipped with cupreous. Fore- 

 wings with 12 veins, 7 and 8 stalked, 7 to costa ; tawny reddish-gray ; 

 a darker discal spot, a little beyond one-third, is succeeded by a larger 

 spot (or confluent pair of spots) at the end of the cell ; below which 

 the outer extremity of the fold is also dark shaded ; cilia brownish 

 cinereous ; underside not iridescent. Hindwings with 8 wings, 5 out 

 of the stalk of 3 -J- 4 ; rather shining, brownish-gray with greenish 

 and cupreous iridescens towards the base ; cilia brownish cinereous, 

 with a slight ochreous tinge ; underside decidedly iridescent. Abdo- 

 men brownish cinereous. Legs brownish cinereous. Alar expanse 

 13.0 mm." 



Hab. — United States, probably Washington City. " Pupa 

 in gall of Phylloxera on Carya alba, etc." 



The above is Lord Walsingham's description, though not 

 in the same sequence. I have examined the type in the Nat. 



TRANS. AM. ENT. SOC, XXXVI. FEBRUARY, 1910. 



