20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



XYLOTOMIMA ANTHREAS (Walker) 



Xylota fasialis Coquillett, Proc. Ent. Soc. Wash., vol. 12, p. 126. (In U. S. 

 National Museum.) 



A fairly large and robust species, 12 mm. 



Male. — Frontal triangle silvery pollinose; arista shorter than 

 width of face ; face partly yellow ; anterior basitarsus without long 

 apical hair but with basal ventral spines; metasternum pilose; hind 

 trochanter without spur; hind legs entirely black except base of 

 tibia ; second and third tergites opaque black with large subquadrate 

 black spots; fourth tergite shining bronze green; discal cross vein 

 joining discal cell at middle; metathoracic spiracle a little smaller 

 than third antennal joint. 



Female. — Ocelli placed well back; front rather broad, across ocelli 

 about one-half the length of arista. 



The female has not been previously recorded. 



The specimen which bears the type and name label '"'Xylota an- 

 ihreas Walker " in the British Museum is in good condition except 

 for some slight discoloration. The principal characters in Walker's 

 description call for: Body brassy; antennae brown; arista black; 

 mouth black; sides of abdominal segments adorned with large steel 

 blue spots; legs bronze black; tibia yellow at base; four fore tibiae 

 piceous, tawny at base and tips; tarsi taAvny. Length about 9 mm., 

 wing about 4.5 mm. 



The type specimen does not agree with Walker's description in 

 two important respects. The face is partly yellow and the ab- 

 dominal spots are yellow instead of being steel blue. The posses- 

 sion of these two characteristics correlated with certain other 

 characters, definitely prove it to be the same species as Xylota fas- 

 cialis Coquillet. 



It seems quite certain that Walker had this specimen before him 

 at the time he described anthreas as the description he gives for 

 anthreas does not fit any other North American species and nowhere 

 else in his publications does he give a description in which the 

 essential characters of anthreas are mentioned. 



distribution. — ^Michigan, Pequaniing, July 12, 1903, male, type 

 (M. Hebard) ; Maine, (C. W. Johnson); Nevf York: Ithaca, June, 

 1922, female (R. C. Shannon), Mount Skylight, Adirondacks, 4,900 

 feet, July 22, 1920, male (J. Bequaert collection) ; Maryland, Belts- 

 ville, June 25, 1915, male (R. C. Shannon) ; Virginia, Dead Run, 

 Fairfax County, May 19, 1916, female (R. C. Shannon). 



Type. — In British Museum. 



