164 Descriptions of British Diptera. 



Genus CHLOROMYIA, Nob. 

 Antennae rather short, the two first joints nearly as in Sargus, the 

 third ovate or elliptical, with the rings rather distinctly marked, the 

 seta pubescent at the base ; (Fig. 1,) palpi two, three-jointed, the 



first joint short and cylin- 

 di-ical, the second likewise 

 cylindrical, but slender, the 

 third globular and pubes- 

 cent, (Fig. 2. b.) Maxillae 

 very minute, or wanting : 

 eyes united in the male ; 

 ocelli placed near each other on the crown : abdomen not much 

 elongated and rather wide ; scutellum and halteres as in Sargus. 



The distinctive characters of the insects included in the present 

 genus were first accurately pointed out by Meigen, although he 

 improperly allowed them to remain as a sectional division of Sargus. 

 The same plan was followed by Macquart, but the differences be- 

 tween the two are far too important to allow this connection to be 

 maintained with propriety. In colouring and aspect, these flies are 

 not unlike the Sargi, but they differ somewhat in their habits, and 

 are much more frequently found on flowers. The species first de- 

 scribed differs from the others in having the eyes pubescent, and 

 the terminal joint of the antennae considerably elongated ; that arti- 

 culation in C. polita and C. flavicornis inclining more to an orbicular 

 shape, as among the true Sargi. 



]. ChLOROMYIA FORMOSA. ( 'S. ) 



Shrank, Meig. Zwei. iii. 110. Musca aurata, Fabr. Donovan, iv. pi. 142. 

 fig. 1. Nemotelus flavogeniculatus, De Geer, vi. 81. Sargus xanthopte- 

 rin, Fallen, Latr — Sargus auratus, Fabr. Syst. Ant. 257. 4. Musca Ci- 

 cur, Harris, Expos, pi. xi. figs. 8, 8, (left hand fig. <£, right hand $.) 



Hypostome shining black, with rather long ochreous pubescence ; 

 eyes likewise pubescent, greenish during life, with a purple band ; 

 antennae brownish-black : thorax shining golden-green, sometimes 

 glossed with violet in the female, covered throughout with rather 

 long ochreous hairs ; abdomen of the male bright brassy or golden- 

 yellow, that of the female strongly tinted with violet blue, changing 

 according to the direction of the light, in both sexes clothed with 

 ferruginous hairs, which are longest in the male, and seen most dis- 

 tinctly when viewed from the head ; under side of the body and sides 

 of the breast black, shining, and rather sparingly pubescent ; thebelly 

 of the female bluish ; legs brownish-black, the apex of the thighs 

 and base of the tibiae reddish-yellow ; halteres pale yellow ; wings 



