18 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



style is expanded into a rather obtuse tooth and following the tooth 

 the style is constricted and partly twisted; apex obtusely pointed. 



Female. — Front fairly narrow, but little narrowed above; fifth 

 tergite sharply flattened on posterior corners. 



Distiihution. — Specimens at hand from White Mountains, New 

 Hampshire (Williston collection) ; Vermont (H. A. Cutting) ; Keene 

 Valley, Adirondacks, New York, June 24, 1920 (H. Notman) ; Wil- 

 mington Notch, Adirondacks, New York, June 29, 1922 (J. M. Aid- 

 rich) ; Colorado, 9,000 feet altitude. Apparently confined to north- 

 ern latitudes or high altitudes farther south. 



XYLOTOMIMA PLESIA (Currati) 



Xylota plesia Cukean, Cau. Eat., vol. 57, 1925, p. 44. 



Male. — Differs from curvipes Loew in being much smaller, 11 mm. ; 

 face narrower, more shining black ; black spines at apex of mid tibia 

 and on underside of mid tarsi (red and fewer in curvipes^ var. 

 satanica) ; the transverse swelling of the fourth tergite occurring at 

 the middle (at basal third in curvipes., var. satanica) ; halteres dark- 

 ened ; cerci much smaller and flat, black in color (yellowish brown in 

 curvipes, var. satanica) ; styles bowed ; a deep and very broad cleft 

 between basal lobe and remainder of style, the style beyond basal 

 lobe simple in outline, narrowed basally, broadening apically and 

 with obtuse point. 



Distribution. — New York; Whiteface Mountain, Adirondacks, 

 July 7, 1922 (J. M. Aldrich). Recorded by Curran from Bathhurst, 

 New Brunswick; Meganic, Quebec; Hastings, Ontario. 



Type. — In Canadian National collection. 



XYLOTOMIMA YEGORS (Ostcn Sacken) 



Arista brow^nish, shorter than width of face ; all parts of legs red- 

 dish yellow except black apex of hind femora and beyond ; halteres 

 darkened; fourth tergite of male swollen on basal third, and imme- 

 diately following depression is another swollen area; fifth tergite of 

 female not flattened on posterior corners. Male with moderate, un- 

 modified cerci ; no cleft between basal lobe and rest of style, styles 

 beyond the lobes flattened, their inner edges opposed and together 

 they form a somewhat hollow saucer-shaped structure. Metcalf* 

 figures male genitalia. Specimens at hand show the same range of 

 distribution as curvipes, apparently a mountain-loving species. 



Distribution. — Recorded from Ottawa, Ontario, New England, 

 New York, North Carolina, Minnesota, Colorado, Saskatchewan. 

 Specimens at hand also from Pullman, Washington (V. Argo). 



* Ann. Ent. Soc. Amer., vol. 14, 1921, pi. 17, flg. 104. 



