ART. 9 AMERICAN XYLOTTNE SYRPHID-FLIES SHANNON 31 



than width of face across middle ; hind tarsi entirelj'^ blackish -brown ; 

 abdominal spots rather small and well defined; spur on hind tro- 

 chanter distinctly smaller. Length 11 mm; wing 8.5 mm. 



Type locality. — Princeton, Maine, July 12 (C. W. Johnson). 



Type. — In collection Boston Society Natural History. 



One male from North Westminster, British Columbia, June 3, 1909, 

 except for its more elongate appearance, agrees fairly well with 

 confusa. 



XYLOTA SCUTELLARMATA Lovett 



Xylota scutellarmnta Lovett, Proc. Calif. Acad. Sci., vol, 9, p. 241, 1919. 



The following description is taken from Lovett. 



Feiiuile. — Length 8 mm. Shining black; thorax with short golden 

 pile ; margin of scutellum with four elongate black bristles ; abdomen 

 opaque black, tergites two and three, with small yellow triangular 

 spots. Face short, moderately concave, brownish, lighter about the 

 oral margin ; antennae broAvnish ; arista dark brown, tAvice as long as 

 antenna. Legs brown, base of all and tips of middle and front 

 tibiae and basal joints of tarsi of front and middle legs light yellow. 

 Collected at Hood River, Oregon, June 6, 1917 (F. R. Cole). Near 

 nemoruiii; varies in bristles of scutellum, etc. 



According to the description, this species probably belongs to 

 the subgenus Xylota.^ whereas nemorum isi located in Xylotoiimna. 

 Long marginal hairs of varying length occur on the scutellum m 

 nearly all of the species of Xylota. Because of this it is difficult to 

 estimate the value of marginal bristles as a specific character. Hoav- 

 eA^er, there are in the collection a male and female (Colorado) which 

 bear on the scutellar margin four unusually strong and dark bris- 

 tles. These may be scutellarmata or a form closely allied. They 

 are closely related to ejuncida, which has strong scutellar bristles, 

 but these are j^elloAvish in color. The male has the yellow spots ob- 

 scured by bluish-black metallic spots. 



Type. — In University of Oregon. 



XYLOTA LOVETTI Ciirran 



XyJoia hiviitata I.ovett, Proc. Calii. Acad. Sci., vol. 10, p. 52, 1920. Name 

 preoccupied by Xylota biritiata Bigot (Chile). This species, however, 

 belongs to Tropidia. 



Xylota lovcfti Curran, Can. Ent., vol. 67, p. 44, 1925. 



Xylota orcgona Curban, Can. Ent., vol. 07, p. 44, 1925. (In Canadian National 

 Collection.) 



Male. — Fairly large, robust species, 11 mm. Antennae yellowish; 

 arista black, longer than Avidth of face ; face yellowish to broAvnish ; 

 mesonotinn dark aeneous; anterior basitarsus Avithout long hair; 

 metasternum pubescent; hind femur but little thickened; yelloAv 

 sjDots on second and third tergites large, quadrate; discal cross A'ein 



