ARGYRA. 209 



the tip of the hind pair dusky ; tibia; yellow, hind pair dusky at the 

 tip ; anterior tarsi yellow, with the tip dusky, hind pair dusky. 

 Common. (E. S. I.) 



4. argentata, Mq. d. i. 457. 2 (1834) ; Zti.—argtjrea, Mg. Tho- 

 race vir'uU alho-induto, alidis fusco-ciUatis, caplte alhicante, Mas. Long. 

 2f ; alar. 5 lin. 



Head silvery -wldte. Thorax green tcitli a icliite coat. Alula edged 

 with black, the fringe broicnish, in some lights shifting to pale yellow. 

 Abdomen silvery, with a pale transparent spot at each side of the 

 second, third, and often of the fourth segment. Femora blackish ; 

 tibiae yellow, the hind pair blackish at the tip ; anterior tarsi yellow, 

 dusky at the tip, hind pair dusky. — The female is not known with cer- 

 tainty, but probably diifers from that of the preceding chiefly by the 

 short arista and yellowish fringe of the alulte, and from that of the 

 following by the fore coxk and tlie tip of the hind femora being dusky. 



Eare. (E. I.) 



5. argentina, Mg. zw. iv. 47. 3 (L824) ; Mq. ; Ztt. — semiargen- 

 tella, Dnvn. ! Thorace viridi albo-induto, alulis imllido-ciliatis, capite 

 albicante, coxis anticis femorihm tibiisfpie jlav'is. Long. 2-2^ ; alar. 

 4-5 lin. 



Head white, silvery in male. Antennae of the length of the arista in 

 the male. Thorax green toith a white coat. Alulce with black edge and 

 palefri7ige. Abdomen in male silvery, with a pale transparent spot at 

 each side of the second, third, and often of the fourth segment; in the 

 female brassy-green, with only the second segment spotted. Fore coxce, 

 the femora, tibia, and base of the anterior tarsi pale yelloio, the hind 

 femora often dusky at the tip in the male. 



Common. (E. S. I.) 



6. vestita, Wd. z. m. ii. 75. 24 (1818); Mn. ; Mg. ; Mq.; Ztt. 

 Viridis, capite alhicante, antenuarmn articulo primo nudo ; Mas. abdomi- 

 nis segmentis intermediis argenteis imtnaculatis. Long. 2 ; alar. 4 Hn. 



Shining green. Head white. Antennae with the first joint naked, 

 the third joint longer than the arista in the male. Alulae with black 

 edge and pale fringe. Seco)id to fifth segments of abdomen in the male 

 silvery, without lateral spots, the sixth blackish. Fore coxae, the femora, 

 tibiae, and base of anterior tarsi yellow, hind femora dusky at the tip, 

 sometimes also the fore coxae and the base of the anterior femora of 

 the male. 



Not rare. (E. S. I.) 



7. elongata, Ztt. d. s. 594. 82 (1843). Thorace viridi nitido, 

 alulis nigro-ciliatis, hypostomate albo. Long. \\ ; alar. 3 lin. 



Shining green. Face white. Antennae of the male with all the joints 

 elongated, and the arista short. Wings witli the subcostal vein not 

 elongated as usual in this genus ; the snbapical but faintly curved, 

 parallel with the cubital. Alula toith a narrow black edge and black 



VOL. 1. 2 E 



