Arctophila. 559 



on the front part ; on the black part two slightly less dull, abbreviated 

 middle stripes are seen, and at each side an elongate, shining spot, 

 but the ground colour is mostly hidden under the long, dense pile 

 with which thorax is clothed; the hairs are yellow on a little less 

 than the front half, black on the rest. Scutellum with still longer 

 hairs, which are yellow but black on the base. Pleura with long 

 hairs, which are mainly black but with a yellow tuft in front of the 

 wing-root. Abdomen black, dull, somewhat greyish pruinose at the 

 base; the fourth segment is shining; sometimes there are a pair of 

 indefinite and obscure reddish spots on third segment, and the sides 

 and hind margin of the fourth segment may be reddish; the hairs 

 are whitish on the basal part, black on the front part of, or on most 

 of the third segment, and whitish or yellow to reddish on the rest of 

 the segment and on the fourth segment; the black-haired part thus 

 varies in extent and is sometimes rather narrow; the hairs are longest 

 on the apical part and at the sides and long at the basal corners. 

 Genitalia reddish, pale-haired. Venter black, shining, with long, sparse, 

 pale hairs, fourth segment with short hairs. Legs black, the extreme 

 apex of femora and the basal and apical part of tibiæ more or less 

 reddish ; tarsi reddish or brownish, the last joint darkened ; sometimes 

 the tibiæ quite brownish or only darker in the middle; hind femora 

 much thickened and curved, hind tibiæ short, rather thick and con- 

 siderably curved, on the inside at the apex prolonged as a blunt spur; 

 legs densely and somewhat long-haired, the hairs black on femora, 

 the short hairs just at the apex yellow, and the hairs on tibiæ yellow 

 or dark yellow. Wings a little tinged, especially towards the apex; 



Fig. 187. Wing of A. bombiformis ^. 



stigma small, brown, with an indefinite stigmatical cross-vein, below 

 it a brown fascia; cubital vein curved a little down; medial cross- 

 vein placed after the middle of the discai cell. Squamulæ and fringes 

 blackish brown. Halteres with the peduncle brown, the knob brownish 

 black. 



Female. Vertex and frons broad, widening downwards, brownish 

 pruinose, just above the antennæ a shining lunule; the hairs yellow 



