May, 1899.] 101 



black hairs ; hypopygium small ; legs long, brown and hairy ; the spurs at the end 

 of the middle tibiae crooked ; tarsi long, with brown ends ; wings flavescent and 

 long, the costal setse long but few in number. Length, 7 mm. I have only seen one 

 example of this species which is in Mr. Dale's collection. 



Blephaeoptera plavicornis, Lw. 

 This small fly has a pale grey thorax and scutellum, and a rufous abdomen. 

 Eyes large and round ; antenna red with a rather short arista ; oi'al setse two ; 

 thorax with the sides lighter; abdomen with a large round hypopygium ; legs yellow 

 with the last three tarsal joints nigrescent ; terminal joints in front legs enlarged ; 

 wings with a small sligma and few and small costal seta?. Length, 3- 4 mm. I 

 have only seen one specimen which was taken by Mr. Billups at Chobluim. 



Blepharoptera humeealis, Ztt. 



This small well marked species has the frontal space yellow with vertex grey ; 

 face pale yellow ; antennae with the third joint very large and round, yellow, with 

 the upper part brown ; oral setse one on each side ; thorax yellowish-grey with pale 

 shoulder points, scutellum yellow with the base grey in the female ; abdomen 

 fuscous with the apex and middle rings often red; legs rufous with ihe tarsi 

 nigrescent and hairy; the femora are all thickened ; wings with Ihe costa armed 

 with few and small setse. Length, 3 — 4 mm. I found a female at Rawdon, near 

 Leeds, in 1881. 



Tephrochlamts magnicornis, Lw. 



This has the frontal space red, with white margins, and rather narrow, 

 occupying not more than one-third of the width of the head in the female ; face 

 pale ; antennae large and rufous, with a slender bare arista not thickened at the 

 base ; oral setae one and sometimes more on each side of the mouth ; palpi yellow ; 

 thorax bluish-grey, covered with minute black hairs, and marked with two sub- 

 distinct dark stripes ; there is one bristle upon the shoulder point, and three in each 

 of the longitudinal rows on the hinder part of the thorax ; scutellum pale red ; 

 abdomen red and unmarked; legs yellow with dark tarsi ; wings slightly brown 

 with a long auxiliary vein which leaves a large yellow stigma. Length, 6 — 7 mm. 

 I have two specimens ; one I took myself near Bradford in 1879, and the other was 

 found by Mr. Beaumont at Pitlochry in Perthshire in 1892, both are females, the 

 only sex known to Loew. 



Thelida oculata, Fin. 

 Thelida Jtliformis, E,. Dsv. 

 Heteromjiza ocidala, Flu., Hal. 

 B.eteromyza atricornis, Mgti., Lw. 

 This interesting and peculiar species was first noticed and described by Fallen 

 in 1S25. He did not place it in a genus by itself, but associated it with another 

 species possessing different characters in his genus Heteromyza. R. Desvoidy met 

 with it apparently without knowing that Fallen had described it, and placed it in a 

 new genus named Thelida*, which he characterized as being similar to his genus 



*Essai sur las Myodaires, p. 655 (1830). 



