l88 ENTOMOLOGICAL NEWS, [June, 



Abdomen metallic-green, with a more or less pronounced coppery reflec- 

 tion on the dorsal surface; laterally it is thickly dusted with white. The 

 black depressions forming a series along either side are small and circu- 

 lar. The whole surface of the abdomen is clothed with silky white hairs, 

 which are conspicuously long on the sides of the segments. Anterior, or 

 inner appendages of the hypopygium yellow ; spoon-shaped posterior 

 appendage with a faint ridge along its convex dorsal surface black, with 

 white hairs and dust. Legs dull metallic-green, rather thickly clothed 

 with white hairs; coxae with white hairs, longest and most conspicuous 

 on the anterior faces of the fore pair; fore femur with from four to six 

 equidistant truncated black spines like bristles on its under surface. The 

 proximal edge of the broad and deep notch is furnished with a dense row 

 of minute black spines; the distal edge is smooth and black on its inner 

 surface. The tip of the fore femur on its inner side bears a small tuft of 

 yellow hairs, on its outer side a series of graduated black bristles. The 

 fore tibia is bent near its middle and armed with three small black brisdes 

 on its outer surface; its inner surface bears a short series of minute spines 

 near the proximal end; towards the tip of the fore tibia the white hairs 

 are longer, and on the inner side at the extreme tip form a short dense 

 fringe; fore tarsi plain, first joint about twice the length of the second; 

 middle and hind legs slender and beset with short black bristles at inter- 

 vals. First joint of middle tarsi about twice as long as the second, last 

 joint distinctly enlarged, subtriangular, black ; hind trochanter armed 

 with a sharp spur, which projects downwards at right angles to the hind 

 femur. This spur is striated, and seems to consist of several agglutinated 

 black bristles. The first tarsal joint is distinctly thicker than the corre- 

 sponding joint of the middle leg; pulvilli of all the legs white. Wings 

 grayish hyaline, yellow at the base, and for some distance along the costal 

 border; veins yellow basally, brownish distally, the costa often yellow for 

 fully two-thirds of its length. The third and fourth veins diverge with a 

 gentle but distinct curvature and then converge to pursue a more parallel 

 course towards the tip of the wing, at which they again diverge very 

 slightly; halteres clear light yellow; tegulae knob shaped, light yellow, 

 with a dense tuft of silvery white cilia. Length of body 4-4.5 mm.; 

 length of wings 4.5-5 mm. 



Female. — Face with a thick layer of golden-jellow dust, which e.xtends 

 up over the metallic-green front; dust on the thorax thicker than in the 

 male and more yellowish. Abdomen broader and flatter. Legs plain, 

 hairs on the fore coxae shorter, fore femur with only the faintest indication 

 of a notch, the under surface armed with several pointed and irregularly 

 arranged bristles. The three black bristles on the outer surfaces of the 

 fore tibia weaker than in the male; middle and hind legs quite plain, the 

 former without the dilatation of the fifth joint and the latter without the 

 spur on the trochanter; pulvilli of all the tarsi somewhat smaller than in 

 the male. Length of the body 4-5.5 mm.; length of wings 45-6 mm. 



Described from twelve male and twelve female specimens. 

 These were collected in part by Mr. A, W. Snow about forty 



