7. SARGUS 183 



Synonymy. — All authors who have mentioned this species agree in its close 

 relationship (except in size) to S. ciiprarius, and it is therefore most probable that 

 all references to it are correct. The representatives of S, nuheculosus in Bigot's 

 collection were ordinary S. cuprarius, and it was evident that he had failed to 

 distinguish even S. cuprariiis and S. iridatus. 



8. S. cuprarius Linne. Legs black, with the knees distinctly orange. 

 Wings with a conspicuous dark cloud about the middle extending across 

 the discal cell. Postocular outstanding ciliation all whitish. 



Very closely allied to S. iridatus, but distinguished at once 

 by the dark cloud on the wings, and by the more conspicuously 

 pale knees and base of hind tarsi. 



$ . Resembling ^S*. iridatvs, but slightly smaller ; f rons (fig. 1 31) more extensively 

 greyish, white haired down to the front ocellus, and the white side-spots just 

 above the antennae usually but not invariably less sharply defined and even 

 indistinctly united across the frons when they are not sharply defined ; 

 middle part of the frons more bare and polished. Eyes in life bright 

 bronze on the upper two-fifths and bright green on the lower three-fifths with 

 a dark blue intermediate band which shades off through violet and purple to 

 the bronze part and through light blue to the green part ;_ the dark blue band 

 starts in front just above the white frontal spot and continues right through 

 to the back (Lundbeck says this band is placed lower down than in ;S'. 

 iridatus) ; facets all almost equal in size. 



Thorax with inconspicuous lighter (almost whitish), grey pubescence which 

 is less distinctly divided into two lengths. 



Abdomen less dulled by dense punctuation ; pubescence down the hinder 

 half of the sides of the fourth and fifth segments more black or even all 

 the sides of the fifth segment black haired. Genitalia smaller and less 

 protruded, and the upper elongate lamellae less hairy. 



Legs with the knees more broadly orange, extending sometimes indis- 

 tinctly to the basal third of the anterior and the basal half (or even more) of 

 the hind tibiae, but sometimes only to the basal sixth of the anterior tibiae 

 and even less of the hind tibite except for the extension on _ the upper side ; 

 and with usually the basal half of the basal joint of the hind tarsi orange, 

 though sometimes this is imperceptible, while occasionally just the base of 

 the middle tarsi is orange. 



Wings with a conspicuous dark cloud about the middle, which extends 

 from the blackened stigma and its costal neighborhood across both ends of 

 the discal cell to tlae fork of the postical vein, and down the stem and along 

 the lower branch of the postical vein, while both basal cells are faintly clouded 

 on their apical quarter. Thoracal squamae perhaps longer, thinner, and 

 darker. Halteres much more whitish. 



?. Frons slightly broader than in S. iridatus, and the two white spots less 

 sharply defined and more extended (though sometimes vaguely) across the 

 frons so that in some lights they almost meet ; front ocellus placed at more 

 than half-way from the vertex to the white spots ; pubescence on the upper 

 part of the frons distinctly white down to the front ocellus ; pubescence on 

 the upper mouth-edge whiter ; postocular black fringe absent. 



Thorax with the point of the humeri yellowish, and sometimes the upper 

 margin of the mesopleurae indistinctly and narrowly pale. 



Legs as in the male. 



Wings with the cloud about the middle browner than in the male but 

 more accentuated, because the rest of the wing is more hyaline and the cloud 

 extends vaguely right across the wing ; subcostal vein rather more yellowish. 

 Halteres whitish yellow. 



Length about 8-5 to 10-5 mm. 



