November, 1905.1 245 



lohich stattd off quite at right angles to the surface. Hind tihiss slightly prolonged 

 into a Hunt process on the ventral side of the apex, with two dorsal bristles (one 

 short subapical and one much longer at one-third from apex), a regular and com- 

 plete antero-dorsal fringe of fine long hairs, and only two to three antero-ventral 

 bristles. Calyptra whitish, lower scale with orange margin. Size, 7 — 8 mm. 



Female : Eyes bare, frons deep black, orbits greyish behind, silvery in front, 

 ocellar triangle greyish, with the central portion immediately surrounding the ocelli 

 polished black. Thorax as in male, but the longitudinal stripes more distinct. 

 Abdomen olive-cinereous, with a very indistinct dorsal stripe. Front tibial with 

 two dorsal bristles as in male. Middle tibiee ivith a single anterior bristle at one- 

 fourth to one-third from apex. Hind tibix with two dorsal bristles as in male, one 

 median antero-dorsal bristle and two to three antero-ventral bristles in apical half. 



Abundant in all parts of the kingdom. 



5. — H. siMiLis, Meade. Male : Very like the preceding species, but the eyes 

 are sub-contiguous, and the abdomen very slightly longer and narrower, more 

 uniformly olive-cinereous, sometimes almost of a leaden hue, the patchy appearance 

 seen at the sides in H. dentipes being quite or almost absent. (This feature is best 

 seen when the apex of the abdomen is turned towards the light.) Middle femora 

 with about six strong bristles on basal half of ventral surface (absent in H. dentipes). 

 Middle tibise with a fringe of tiny hairs on anterior surface ; these, however, are 

 not erect, but stand at an angle of 45° loith the surface. Hind tibix without the 

 ventral apical projection ; antero-dorsal surface fringed with fine hairs, toith two to 

 three strong bristles in apical Aa//" (absent in H. dentipes), and a series oi six to 

 twelve or even more antero-ventral bristles in apical half. Calyptra with the lower 

 scale more strongly tinged with orange. Size, 8 — 9 mm. 



Female : Like that of H. dentipes, but the hind tibise have four to six antero- 

 ventral bristles, which occupy the apical two-thirds. Calyptra much more yellowish. 

 I have not been able to discover any other good and constant character by which 

 the female of this species may be distinguished from that of the preceding. In 

 most specimens, however, the abdomen appears to be more uniformly olive-grey. 



This is undoubtedly a distinct species, widely distributed, but no 

 doubt often passed over as H. dentipes. I have examined at least 

 fifty specimens from all parts of the country, but the majority (indeed 

 nearly all) of my records are from Scotland and the more hilly parts of 

 England. It ranges from Lynton, Devonshire (Verrall) to Golspie 

 (Terbury) and Lairg (Verrall) in Sutherland. 



6. — H. PAL^STEiCA, Mg. (rojirfawu', Meade). Male: Eyes bare, separated by a 

 rather wide black space ; arista thickened and very distinctly pubescent in basal 

 half. Thorax black, toith dark slaty-grey tomentum, which in anterior half leaves 

 three about equally broad longitudinal stripes black, shoulders light cinereous. Ab- 

 domen yellowish-cinereous, or with a slaty-bluish tinge ; a narroio black dorsal 

 stripe usually reaching the apex and much broadened on Ist segment. Middle 

 coxz armed behind with three very strong spine-like bristles, which are closely 

 applied to one another and directed downwards and slightly backwards. Middle tibise 



X 



