244 [October, 1905. 



A common species. I have seen over thirty specimens, and have 

 records which extend from the extreme south of England to Gairloch, 

 Aberdeen and Gols])ie in the north. The dates range from April 20th 

 to October 17th. The male is easily recognised, but the female is 

 more diiEcult to identify. If careful attention be paid, however, to 

 the characters given in the key and those in italics in the preceding 

 paragraph, the latter sex may be identified with tolerable certainty. 



3. — H. CTRTONEURINA,' Ztt. {silvicola, Lw.). Male: Eyes thickly haired 

 above, arista shortly pubescent in basal half. Thorax deep hlack, slightly shining, 

 shoulders shining black. Abdomen black wifh a slight olive-greenish tinge, thickly 

 covered with grey tomentum, which is much denser at the sides, giving an almost 

 tessellated appearance, and leaving a somewhat indistinct dorsal stripe. Hind 

 tibim with ttoo dorsal bristles in apical half, a complete but irregular row of antero- 

 dorsal bristles, a regular series of about six antero-ventral bristles, and an irregular 

 series of mixed bristles and hairs in the middle of the postero-ventral surface. Wings 

 strongly tinged with brotvn ; ealyptra strongly tinged with orange. Size, 7 — 8 mm. 



Female : Unknown to me. The following particulars are taken from Stein's 

 description : Eyes only shortly and sparingly hairy, so that this sex is difficult 

 to distinguish from the female of deiitipes, which it much resembles. Thorax 

 dusted with grey, when seen from behind with a rather broad but indistinct 

 middle stripe. Sternopleural bristles, one anterior and one posterior, under 

 the latter never a second shorter one (which is always the case in dentipes). 

 Abdomen with slight tessellation and a trace of a dorsal line. Middle tibise without 

 anterior bristle ; mostly with three posterior bristles. Hind tibise with one dorsal, 

 two or more antero -dorsal, and four to five equally long antero-ventral bristles. 



A rare species, and possibly confined to the south of England. 

 I have only seen five British examples, all males, viz. : two from Ivy- 

 bridge (12.6.83) and one from Lynton (19.6.83), Devonshire, in 

 Verrall's Collection, one from Ivybridge in the Brit. Mus. Collection, 

 obtained by Col. Terbury (4.5.93), and one from Felden, Herts 

 (13 10.97), captured by A. Piffard, and also in the Brit. Mus. Collec- 

 tion. Meade refers (Ent. Mo. Mag., xviii, p. 123) to a specimen 

 taken by C. W. Dale at Glanvilles Wootton. 



4. — H. DENTIPES, Fab. Male : Eyes bare, separated by a narrow deep black 

 space ; arista distinctly thickened and pubescent at base. Thorax shining black, 

 with a very slight greyish tomentum, which \e&\es four rather indistinct longitudinal 

 black stripes, viz., two narrow inner ones and two broad outer ones, shoulders dis- 

 tinctly cinereous. Abdomen greyish-olive, covered with grey tomentum, which is 

 patchy and much denser at the sides, giviiig a slightly tessellated appearance, base 

 of 1st segment black, from which proceeds a slender dorsal black stripe, which is 

 continued quite to the tip of the abdomen. Front tibise loith two dorsal bristles, 

 one near the apex and a smaller one about the middle. Middle tibise with the 

 anterior surface furnished with a regular and characteristic fringe of tiny hairs. 



