274 SYKPIIID.T2. 



Antennee ferruginous. Disc of the thorax cupreous. Wings slightly 

 grey ; stigma hirid. Halteres luteous. Knees and tarsi tawny, the 

 latter black towards the tips. 

 Not common. (E.) 



2. nobilis, Pin. syrph. 57. 17 (1816); Mg. ; Mq.; _Lw_. ; Ztt. 

 iEueo-viridis, anteunls articulo tertio piceo subtus ferrugineo, alls cinereis, 

 tarsis uigris. Long. 2^ ; alar. .5 lin. 



Male. iEneous-green. Antennee black ; third joint piceons, ferruginous 

 beneath. Disc of the thorax cupreous. Wings grey. Halteres luteous. 

 Tarsi black. 



Rare. In Mr. Stephens's collection, (E. I.) 



Genus XXI. OHRYSOGASTER. 



Cheysogasteb, Mq. d. n. (1827). Musca p., L. ; Gm. Syrphus p., 

 Fb. e. s. ; Pz. Eristalis p., Fb. s. a. ; Fin. Milesia p. ? LI. Chry- 

 sogaster p., Mg. ; St. F. et Srv. ; Ztt. ; Lw. ; Edn. 



Epistoma vix elongatum, ad os pj'ominens. Antennee basi disjunctie, ca- 

 pitis latitudine conjunctim hreviores ; articulus tei'tius ovatiis vel orbi- 

 culatns ; quartus dorsalis ; quintus nudns. Sciitellum depressum, ad 

 marginem acutum. Ala areola discali ab margine posteriore dlvaricata, 

 areola siibapicali integra, lobo axillari distincto, venis siibcostali et ra- 

 diali ad marginem disjunctis, vena transversa prcebrachiali ante areolae 

 discalis medium inserta. 



Body almost bare. Colour metallic. Head semicircular ; epistoma 

 protuberant towards the mouth, hut little elongated horizontally ; peri- 

 stoma prominent, oblong, naiTOwer in front, inclined upwards. Eyes 

 bare. Labrum notched at the tip. Lingua acute. Maxilla) subidate, 

 not half the length of the palpi. Palpi curved, filiform, somewhat 

 clavate at the tips, slightly hairy, longer than the labrum. Labium 

 semicylindrical. Antennee 5-jointed, porrect, nutant, seated on a 

 tubercle of the front, separated at the base, jointly shorter than the 

 breadth of the head ; first and second joints small ; third oval or round ; 

 fourth seated on the hack of the third ; fifth setiform, bare. Scutellum 

 flat, with a sharp edge. Wings finely pubescent, incumbent and pa- 

 rallel in repose. Discal areolet diverging from the posterior margin ; suh- 

 apical areolet entire ; axillary lobe distinct ; subcostal and radial veins 

 ending separately in the margin ; transverse prfebracliial vein placed before 

 the middle of the discal areolet. Abdomen oblong, depressed. Legs 

 slender. Male. Epistoma most often with some tubercles. Eyes con- 

 tiguous. Thorax beset with fine hairs. Feni. Eyes remote. Front 

 with a row of oblique transverse furrows on each side ; these are 



