120 [May, 1909. 



ones much smaller, almost minute, antennae black and in male rather large, 

 palpi pale yellow, with the bristles shortisii ; wings yellowish-brown, paler in 

 female, fringe not very long, 1 about equal to 2 in male but somewhat more in 

 female, angle at fork rather small but larger in female than male ; legs yellow, 

 hind femora stout with a dark spot at apex and a few long hairs on the basal 

 half of the under-side, tibial cilia large and strong with the central one much 

 longer than the others in the male but somewhat weaker and more even in 

 female; liypopygium of moderate size and without bristles, ventral plate dusky 

 yellow, narrow and pointed, anal organ bright yellow, very long and large, 

 narrow at base and widening considerably towards apex... 



I5 — If mm. cilipes, n. sp. 



81 (80) First costal division about twice as long as the second. 



82 (83) Thorax and antennx yellow. 



S ? • Thorax always yellow ; abdomen very variable, in male yellow with the 

 2 middle segments black, leaving only a central line of the ground colour, or 

 the blackening more extensive and in the extreme form extending over the 

 whole dorsal surface, in female entirely yellow with the first joint of the 

 ovipositor conspicuously black, or with the dorsum partially or wholly black or 

 brown, belly in both sexes all yellow and in the dark forms sharply delineated 

 from the dorsum ; frons of the ordinary proportions, grey (J ) yellow, or in the 

 dark forms, grey ($), antennae small and pale yellow, upper supra-antennal 

 bristles moderate, under ones merely hairs, small {^) minute ( ? ), palpi pale 

 yellow with shortish bristles ; wings and veins flavescent, fringe only 

 moderately long, costa to middle of wing {S) beyond ($), costal divisions 

 somewhat variable but 1 always greatly longer than 2, angle at fork moderate 

 but somewhat variable also, 1st thin vein scarcely curved at its origin and 

 beginning about opposite the middle of 3rd thick vein, which is angulated at 

 this point ; legs yellow, hind femora usually but not invariably darkened at tip 

 and with a few long hairs on basal half of under-side, hind tibiae arched along 

 the upper border with the cilia fir.e and delicate but of distinctly bristly 

 character ; liypopygium of medium size and black, without bristles or hairs, 

 anal organ clear yellow, stout and rather short Ij mm. liitea, Mg. 



83 (82) Thorax black or dusky red. Antenna; red. 



$ $. Thorax variable, black with the postalar calli and scutellum more or less 

 yellow, or red tinged to a greater or less extent with dusky, but never pure 

 yellow as in lutea, abdomen black with the belly usually yellow ; frons black, 

 its proportions as in lutea and cilipes, under pair of supra-antennal bristles 

 very weak but larger than in lutea, antennae small, varying from pale to dusky 

 red or almost brown ; palpi as in lutea and cilipes ; wings much as in lutea, but 

 the fringe full long and the angle at fork rather more open, and 1st thin vein 

 leaves opposite the fork instead of beyond it ; legs also as in lutea but the 

 tibial cilia even more tender and very much more so than in cilipes ; 

 hypopygium of medium size, without bristles or hairs, anal organ shorter 

 and stouter than in lutea and filling up the posterior outlet of the hypopygium 



Ig — ly mm. scutellaris, n. sp. 



