REVISION OF THE OECOPHORIDAE — CLARKE 143 



Male genitalia. — Harpe with the apical and basal portion just below 

 costa clothed with coarse hairs ; marginal hairs fine ; sacculus heavily 

 sclerotized; clasper divided; transverse arm straight, slender, arising 

 at or before middle of harpe and reaching to or slightly beyond costa ; 

 at the base of the arm a sclerotized portion forming a short, sharp 

 thorn (in some specimens this is scarcely noticeable) ; the other arm 

 is short, sharply pointed and parallel to the sacculus; cucullus 

 rounded. Anellus a rectangular plate, deeply cleft on the posterior 

 edge; lateral lobes weak. Vinculum rounded. Aedeagus broad 

 dorsoventrally and compressed laterally. The dorsal edge is strongly 

 sclerotized ; both ends slightly enlarged ; vesica with a spinulate patch 

 at middle. Transtilla a narrow sclerotized band ; lateral lobes large, 

 not fused. Gnathos a spined oval knob. The gnathos varies slightly 

 in different specimens. Socii broad hairy flaps. 



Female genitalia. — Genital plate broad, with two narrow, raised 

 ridges posterior to ostium. Ostimn small, roimd and situated at ex- 

 treme anterior edge of plate. Ductus bursae membranous, short, and 

 tapering into the bursa copulatrix. The latter is large, asymmetrical. 

 Signum an elongate-oval, sclerotized, scobinate plate, extending almost 

 the entire length of the bursa. 



Alar expanse, 20-25 mm. 



Type. — In the British Museum. 



Type locality. — Fort Klamath, Oreg. 



Food plant. — Apple? 



Distribution. — Western United States and Canada as far east as 

 Ontario. 



United States Records 



Montana: Ravalli County, 3 $$,9 (1-29-33, from magpie nests). 

 Oregon: Fort Klamath, 2 $ $ (IX-20-71, Walsingham). 



Washington: Bellingham, ? (VIII-22-26, J. F. G. Clarke) ; Logan Hill, Chehalis, 

 3 5 5,29? (11-16 to in-28-30, T. M. Clarke). 



Canadian records 



British Columbia: Duncan, $ (Apr. 1-7, Hanham) ; Fraser Mills, 5 (IX-5-20, 

 L. E. Marmont) ; Hazelton, $ (IX, 14-21, W. B. Anderson) ;' Kalso, $ 

 (IV-24-15, J. W. Cockle) ; Marron Lake, $ (Apr. 1924, C. B. Green) ; Quami- 

 chan Lake, Vancouver Island, $ (IX-27-02) ; Vancouver, $ (III-18-96, 

 Livingston) ; Victoria, $ (IV-18-17, E. H. Blackmore), $ (VIII-29-23, K. F. 

 Auden), $ (III-10-23, W. R. Carter) ; Wellington, 3 5 5,6 5 $ (V-25-07, 

 April [3 specimens] ; 3 specimens, III-22-03, G. "W. Taylor). 



Ontario: Hymers, 2 5 5 (no date or collector) ; Ottawa, 5 (II 1-18-05, C. H. 

 Young). 



RenypLvks. — After studying 45 specimens and 29 wing and genitalia 

 slides, I am convinced that all the above material is referable to this 

 species. I admit that the series studied shows many minor superficial 

 differences existing between specimens. In genitalia, however, even 



