ART. 9 AMERICAN XYLOTINE SYRPHID-FLIES SHANNON 29 



metasternum pubescent; hind trochanter of male with longer spur 

 than ejuncida; discal crossvein joining discal cell beyond middle; 

 second and third tergites chiefly reddish yellow, a dark narrow me- 

 dian line (more or less definite) extending down through the lighter 

 color, and also present on the hind margins. 



Disfnhution. — Maine, Bar Harbor, August 16, one male (C. W. 

 Johnson) ; New Hampshire, Franconia, July 18, 1915, 1 male (C. H. 

 T. Townsend, White Mountains, 2 females, 1 male (Williston col- 

 lection)) ; Alaska, Fairbanks, July 7, 1924 (J. M. Aldrich), Anchor- 

 age, June 13, 1924 (J. M. Aidrich), Savonoski, Nakhek Lake, July 

 (J. S. Hine). 



Xyloia suhfasciata Loew has been recorded (correctly so?) from 

 Virginia, District of Columbia, Maryland, Wisconsin, and Oregon. 



This species probably will prove to be of northern distribution. 

 Metcalf figures the male genitalia and Cole and Lovett state that 

 it has been reared from the decayed heart of fir. 



Type. — In Museum of Comparative Zoology. 



XYLOTA NOTHA V/iUiston 



Very closely related to X. suhfasciata Loew. It differs in averag- 

 ing a little larger, 10-12 mm. ; mesonotuni more brassy, and the sec- 

 ond and third tergites entirely red except for anterior border of the 

 second and posterior margin of the third. A female from New 

 ]\lexico has the dark markings as in suhfasciata. Male witli v/ell 

 developed spur on hind trochanter, said by Williston to be absent. 



Distrihution. — Colorado, Locality ? one male, type (Williston Col- 

 lection). Locality?, 8,000 feet altitude, one male; New Mexico: 

 White Mountains, North Fork Euidoso, 8,200 feet, flowers of Soli- 

 clacjo trinervata, 1 male (C. H. T. Towmsend) ; Beulah, July 11, 1902, 

 female (T. D. A. Cockerell) ; Chusca Mountains, 8,800 feet, June 30, 

 1918 (A. Wetmore. Biological Survey Collection). 



This species has been recorded from Vineland, Ontario, Canada 

 (A. Gibson). Perhaps it will be found to be confined chiefly to 

 high altitudes in the southern Kocky Mountains. 



Type. — In U. S. National Museum. 



XYLOTA EJUNCroA Say 



A discussion of this and allied species has been given in the 

 introduction. 



Medium size, rather slender, 9-11 mm. Third antennal joint 

 somewhat variable, a little longer than broad, rounded, yellowish 

 to blackish in color ; arista entirely black, bare, longer than width of 

 face; mesonotum dark aeneous; last three tarsal joints of fore tarsi 

 black; only basitarsal joint of fore tarsus w^ith long hair; meta- 



