268 LEPTID.5^> 



rather ferruginous ; posterior cox^ gi'ey, witli pale pubescence in front of 

 the middle pair and outside the apical half of the hind pair ; tiny black bristles 

 clothe all the legs, but the femora bear some stronger (though still very small) 

 black bristles, while a few minute black bristles are scattered all over the 

 tibiae, and also some on the upper side of the basal joint of the front tarsi ; 

 spurs on the posterior tibice dark ferruginous ; " touch-hairs " beneath the 

 front tarsi rather numerous. Pulvilli pale broAvn ; claws brown but black at 

 the tip. 



Wings smoky yellowish but brownish orange about the base ; veins 

 blackish but also brownish orange about the base • stigma long, black or 

 brownish black, and consi^icuous, but not touching the costal or radial vein ; 

 anibient vein black all round, even on the alulae ; costal and subcostal veins 

 bristly as in L. scolopacea. Squamae (alar) glassy yelloAvish, with an orange 

 margin and a fairly abundant pale fringe ; frenum scarcely widened, glassy 

 whitish yellow. Halteres orange. 



9 . Frons about one-sixth the width of the head and parallel-sided from the 

 ocelli to the suture just above the antennae, light ashy grey with a brownish 

 tinge on a large part of the disc, practically bare but with a very few tiny black 

 bristles scattered about ; space between the eyes widening from the frons to 

 the mouth, where it is about one-third the width of the head ; epistoma light 

 ashy grey, bare ; side-cheeks greyish white, with very much less pubescence 

 than in the male ; jowls and back of the head a little inflated, and their 

 pubescence almost as in the male, but there are a few black hairs on the 

 jowls ; palpi with the bristles all black except beneath, where they are pale. 



Thorax and scutellum with less abundant and much shorter pubescence 

 on the disc than in the male, though the bristly pubescence is quite as long on 

 the sides ; the ridge between the wing-base and the postalar calli rather 

 ferruginous. 



_ Abdomen more or less ferruginous, ranging from the three basal segments 

 being orange ferruginous with only the extreme base of the first segment 

 and a large dorsal spot on each of the segments black, to nearly all 

 greyish black excej^t a ferruginous spot at the basal corners of the second 

 segment and also some narrow hindmargins ; fourth and remaining seg- 

 ments obscure black with narrow ferruginous hindmargins, which are most 

 conspicuous on the third, and sometimes sixth and seventh, segments ; 

 pubescence much shorter than in the male. Belly nearly all greyish black, 

 • except on the orange hindmargins where the dorsal coloring shines through ; 

 first and third segments, and the basal segments to a certain extent, with 

 slight pale pubescence. Ovipositor with apparently four short obscure black 

 segments which have narrow orange hindmargins, while after these comes 

 the genital plate below with a pair of small oval brownish lamellae above. 



Legs almost as in the male, but the middle femora only obscurely blackish 

 about the base beneath or even hardly at all blackish, and the hind tibias not 

 so much darkened at the tip. 



Wings more pellucid, and more orange about the base. 



Length about 10 mm., but varying from 8 to 1 1 mm. 



This species is distinguished by its wings being imniaculate except for 

 the conspicuous blackish stigma and by its extensively black legs ; in fact, 

 it is distinguished from any known European species by these characters 

 and by its entirely slaty grey scutellum having no trace of ferruginous 

 colour at its tip or on its sides. It varies very little unless from 

 immaturity, as an immature female taken in Arran on June 6, 1882, has 

 the femora all yellowish except a somewhat yellowish brown tinge beneath, 

 the belly orange at the base, and the stigma practically absent because 

 the whole marginal cell is unicolorously pale orange. 



L. notata is rather common as a mountain species in the Midlands and 

 the North, but I have no record south of Herefordshire (near the Black 

 Mountain) and Worcestershire (The Malvern Hills) ; it seems to occur very 



