1906.] 9 



black dorsal stripe. Front femora on ventral surface with four to five strong spines 

 near base, their apices blunt and very slightly enlarged. Middle femora with two 

 to three strong ventral spines near base, similar to those on the front femora. Hind 

 femora about the middle of the ventral surface with a pair of closely applied spines 

 as long as the greatest breadth of the femora, and veith blunt apices ; hind tibiae 

 on the ventral surface with short fine hairs in apical two-thirds, and about the 

 middle a characteristic tuft of three or four strong bristles, which converge at the 

 apex, and are about three times as long as the tibia is broad. Wings tinged with 

 yeilowish-brotvn ; calyptra sometimes faintly tinged with yellow, halteres brownish- 

 yellow. Size, 4 — 5^ mm. 



Female : Frons a^id ocellar triangle dark slaty-grey, not shining. Thorax 

 blackish-cinereous, slightly shining, with a faint indication in front of three narrow 

 blackish stripes, shoulders light cinereous. Abdomen cinereous, with the faintest 

 trace of a dark dorsal stripe. Middle femora as in the preceding species ; middle 

 tibix with tivo posterior bristles, at one-fourth and one-half from apex respectively, 

 and one anterior bristle at about one-third from apex. Hind femora as in ^ , ex- 

 cept that the ventral spines are absent ; hind tibiae with a single subapical dorsal, 

 one median antero-dorsal, and one to iioo post-median antero-ventral bristles. Wings 

 quite hyaline, calyptra as in J , halteres brownish-yellow, and even lighter than in J . 



Of this species I have examined eighteen males and one female. 

 It appears to be widely distributed but not common. The single 

 female was taken in cop. by Dr. J. H. Wood in his garden at Tar- 

 rington, May 18th, 1902, and this sex was previously unknown. The 

 males were taken chiefly in the South of England, e. g., Ivybridge, 

 Newmarket (Yerrall) ; Hay, Torcross (Yerbury) ; Felden, Herts 

 (Piffard) ; one Ilkley (Meade), and one Burley-in- Wharf edale, York- 

 shire (P. H. Gr.) ; and lastly, one in Arran (Yerrall), which is the 

 only Scotch specimen I have seen. Yerrall gives Tongue in Suther- 

 land as a locality. The dates range from May 9th to October 10th. 



10. — H. MILITARIS, Mg. {impexa,'Lvi.). Male: Eyes bare, contiguous, arista. 

 distinctly pubescent, very slightly and gradually thickened towards base. Thorax, 

 including shoulders, deep shining black, with hardly a trace of tomentum. Abdo- 

 men bluish-cinereous, base of 1st segment and a slender dorsal stripe blackish, the 

 latter sometimes only indicated by a brownish streak. Front femora with a row of 

 about a dozen very strong postero-ventral bristles in basal half. Middle femora 

 with a series of about six very strong sub-basal bristles on the anterior edge of ven- 

 tral surface, and co-extensive with these about the same number of smaller and 

 weaker spines on posterior edge of same surface ; those of anterior row stand on 

 little warts or bosses, which are very prominent and characteristic. Middle tarsus 

 with a fringe of long, wavy hairs at the apex of 3rd, and on the whole of the last two 

 segments. Hind femora on the postero-ventral surface with a dense row of short 

 fine hairs near base, and two very long and fine hairs at one-third and two-thirds 

 from base respectively. Hind tibix with three to four long antero-ventral bristles 

 in apical half. TFings hyaline, or slightly tinged with brownish, posterior transverse 



