[January, 



10 



vein unusually long, quite straight, and rather oblique, a little more than its own 

 lencrth from the middle transverse vein, so that the last two sections of the 4th 

 longitudinal vein are of approximately equal length Aeross the end of the discal 

 ce\\i^^ dusky patch of microscopic hairs, which is characteristic of this species. 

 This patch is continued across the 5lh longitudinal vein almost to the land margin 

 of the wing, and its inner edge runs exactly parallel to the posterior transverse 

 vein. Calyptra with the margin of the lower scale strongly tinged with orange. 

 Salteres with blackish head and lighter stem. Size, 5^—6^ mm. 



Female : Frons dull black, or sometimes with a slight reddish-brown tinge 

 behind the antenna, usually with a very slight greyish tomentum when viewed 

 from the front; ocellar triangle and orbits shining, but not conspicuously so. 

 Thorax black and polished, unicolorous, shoulders slightly greyish. Abdomen uni- 

 formly blackish-cinereous, but apical segment lighter, being covered with cinereous 

 tomentum. Front tibiae with a subapical dorsal bristle, and a small antero-dorsal 

 bristle at or a little beyond middle. iMiddle tibi^ with one small antero-dorsal 

 bristle at one-fourth from apex, three about equidistant postero-dorsal bristles, and 

 one ventral bristle at about one-fourth from apex. Hind femora on postero-ventral 

 surface with a few short hairs at base and apex, and ttvo long, fine hairs as in S , but 

 not quite so conspicuous ; hind tibise with one subapical dorsal, two antero-dorsal, 

 and two postero-dorsal bristles, a dense series of tiny postero-dorsal bristles near 

 apex as in (J , and two to three antero- ventral bristles in middle portion. Wings as 

 in $ ,hxxt posterior transverse vein is upright, not oblique, and shorter, patch of 

 microscopic hairs absent ; last section of 4th longitudinal vein a little longer than 

 penultimate. Calyptra and halteres as in $ . 



A very distinct and tolerably common species. 1 have seen over 

 sixty specimens, from localities ranging from Devonshire and the New 

 Forest to Golspie, and bearing dates from June 8th to August 20th. 

 It was also taken by Haliday in Ireland. 



11.— H. TUBBKCULATA, Rond. Male: Eyes bare, contiguous ; arista slightly 

 pubescent and thickened at the base. Thorax blue-black and polished. Abdomen 

 hlue-blach when seen from behind with a very slight tomentum, which leaves an 

 indistinct central dorsal stripe, which is broad on the 2nd segment and much nar- 

 rower on the 3rd. Front femora with two rather inconspicuous teeth, the anterior 

 one bifid at the tip ; front tibia: with a fringe of fine and short postero-ventral hairs 

 in apical half. Middle tibix with two to three postero-dorsal bristles in apical half, 

 middle third oi anterior surface with a regular fringe of short erect h^iv^, posterior 

 surface fringed in its apical three-fourths with regular fine hairs, which are slightly 

 recumbent, as long as the postero-dorsal bristles, and nearly twice the length of the 

 hairs in the anterior fringe. Eind femora with a row of antero-ventral bristles, of 

 which about /j;e to six nearest the apex are very long and conspicuous, the rest ex- 

 tremely short ; hind tibise with one long dorsal bristle at one-third from apex and 

 one small one quite near apex, one antero-dorsal, and one anterior^ristle about 

 middle. Wings usually with a strong brotonish-yellow tinge, last section of 4th 

 longitudinal vein usually three times as long as the penultimate, calyptra brownish- 

 yellow^ halteres blackish. Size, 5— 5i mm. 



