. 4. NEMOTELUS 117 



ring just below the middle or even a blackish postero-dorsal streak there, or 

 with even a broad band on the middle tibiae from near the middle to almost 

 the tip ; hind tibiae black with the basal quarter and just the tiji orange ; all 

 tarsi pale orange to the very tip so that the black claws became conspicuous. 

 Pubescence on the coxae, and a moderately long fringe behind the anterior 

 femora, pale yellow. 



Wings glassy hyaline, with very faint veins except for the yellow veins on 

 the front jjart of the wing from the base to the basal part of the discal cell 

 and thence on to the end of the cubital vein. Squamae clear jaale yellow, 

 alar pair with a whitish fringe, and the thoracal pair forming a somewhat 

 longish lobe which bears a long pretty whitish fringe. Halteres clear yellowish 

 white, with the base of the stem a little darkened. 



Very different from the male. Head very elongate triangular ; snout almost 

 as long as the eye in profile, and brown doi'sally after the antennae ; frons 

 without any white spots, though the sloping smooth spaces can generally be 

 traced on which the spots should exist because the adpressed short white 

 pubescence shows up more obviously above and below these spaces ; pu- 

 bescence short and adpressed but rather obvious (because of its white colour) 

 on the sides of the frons and on the back of the head and to a less extent on 

 the snout, though it is conspicuous on the upper part of the snout between 

 the antennae and the eyes. Eyes so small that the rather rumpled frons 

 between them occupies more than one-third the width of the head, while the 

 space behind them is widely inflated but not the space below them. Antennae 

 placed at about two-thirds the length of the snout ; third joint larger and 

 more distinctly annulated than in the male. 



Thorax more coarsely punctate, and with the white side-markings almost 

 reduced to a small humeral spot. Pubescence greyish white, rather depressed 

 and sloping inwards and forwards, shorter than in the male but still obvious. 



Abdomen shining black, with a short triangular white spot on the middle 

 of the hindmargin of the second, third, and fourth segments, but these spots 

 vary somewhat in size and intensity and the one on the hindmargin of the 

 fourth segment is always small and may sometimes be absent ; there is also 

 a continuous almost equal white margin all down the sides and round the 

 hindmargin of the fifth segment ; segments after the fifth one small and 

 mainly whitish ; pubescence whitish and universal, but very short and 

 depressed. Belly all shining black, very sparsely punctate, and occasionally 

 the foremargin of the second segment and the hindmargin of the third and 

 fourth segments narrowly yellowish, while indications of this may occur on 

 the subsequent segments ; margin all equally white ; pubescence whitish, 

 sparse, and inconspicuous. 



Legs as in the male. 



Wings, squamae, and halteres as in the male. 



Length about 5 mm. 



*t>"- 



This species varies a little, but not so much as N. uKginosus and N. 

 notatus. The white markings of the abdomen of the male are liable to 

 discoloration, especially about the hind corners of the third segment, and 

 a male taken at Tuddenham on June 27, 1880, has a small roundish 

 sharply defined black spot on the third segment close to the middle of the 

 foremargin ; the belly of the male varies from being all whitish yellow 

 except for a pair of long transverse reddish spots on the second segment 

 and a small narrow black spot on the middle of the base of the fifth 

 segment to being extensively blackened even to the hind half of the third 

 segment and on all the fourth segment except two spots on the foremargin, 

 and on all the fifth segment except the hindmargin (which widens at the 

 middle almost up to the foremargin), and even partially blackened on the 

 second segment. 



More remarkable than any other variety is a male taken by Colonel Yerbury at 

 Kenmare in Co. Kerry on June 30, 1901, which I once thought might belong to a 



