ART. 9 AMEKICAN XYLOTINE SYRPHID-FLIES SHANNON 19 



{Xylota) Xylotomina feviorata (Linnaeus) (European) has geni- 

 talia very similar to vecors. However it has a black coxae as in 

 curvipes. 



Type. — In Museum of Comparative Zoology. 



XYLOTOMIMA METALLICA (Wiedemann) 



Xylota suhtropica Cueran, Can. Ent., vol. 57, p. 44, 1925. lu Canadian 

 National Collection. 



This species has rarely been recorded since it was described. 

 Banks lists it in the " District of Columbia Diptera : Syrphidae " 

 and states, " In general resembles X. e'juncifla., but the pale femora 

 will separate it." A number of specimens have been found in col- 

 lections, by the writer, usually confused with ejuncida. The descrip- 

 tion is based upon these specimens. 



A rather small, slender species, 10 mm, 



Male. — Frontal triangle shining except along the margins, which 

 are silvery poUinose; upper part of triangle with rather numerous 

 hairs ; arista yellowish brown ; four fore legs reddish yellow, femora 

 sometimes brownish through the middle, tips of tarsi darkened; 

 hind legs mostly black, bases of femur and tibia and ventral surface 

 of tarsus yellowish; hind trochanters with a trace of a spur; second 

 and third tergites with large yellow spots; discal cross vein joining 

 discal cell slightly before the middle; posterior cross vein shorter 

 than section of fourth vein above it ; metathoracic spiracle noticeably 

 smaller than third antennal joint. 



Female. — Arista about two and one-half times width of front 

 across ocelli. Abdominal spots more obscured, sometimes quite 

 small. 



Originally described from Georgia. 



Curran states in his description of suhtropica that " this species is 

 smaller and much more slender than nietallica and has the oral 

 margin decidedly less produced." His description was based on two 

 males, from Memphis, Tennessee, in the Canadian National Collec- 

 tion. These characteristics are covered by material of metallica at 

 hand and apparently are not sufficient for specific differentiation. 



Distribution. — Georgia, Type locality (recorded by Wiedemann) ; 

 Maryland: Bladensburg, September 23 (K. C. Shannon), Plummer 

 Island, September 17 (R. C. Shannon); Virginia: Great Falls 

 (McAtee), Dead Run, reared from rotten maple log, June 29, 1915 

 (R. C. Shannon), Falls Church, June 7 (N. Banks); Tennessee: 

 Memphis, June 12, 1922 (Recorded by Curran); Florida: Jackson- 

 ville (Mrs. A. T. Slosson); Texas: Paris, April 4, 1904 (C. T. 

 Brues). 



T'^ipe. — Location unknown. 



