MEKODON. 251 



with four luteous stripes ; scutellum tawny, dingy towards the base. 

 Wings slightly grey. Halteres yellow. A.bdoraeu with three curved 

 interrupted yellow bands ; hind borders of the segments glaucous ; tip 

 yellow. Legs luteous; hind legs darker than the anterior; hind 

 femora striped with black ; hind tibite piceous at the base ; hind tarsi 

 piceous or ferruginous. 

 Not common. (E.) 



7. transfugus, L. f. s. 1818 (1761); Gm. ; Mg. ! zw. pi. 32. 

 f. 8 ; ]Mq. ; Lw. ; Ztt. — Unealiis p., Fin. — liiiddii, Ct. Facie producta 

 subconica apice obtusa, thoracis vitta irdermedia nigra Uuea pallida di- 

 visa. Long. 4| ; alar. 8 lin. 



Brown. Head yellow ; vertex tawny, piceous about the ocelli ; 

 epistoma produced, obtuse, black on each side. AntemiEe ferruginous ; 

 first joint piceous ; second dark ferruginous. Thorax with four slender 

 luteous stripes ; scutellum dingy tawny. Wings pale grey. Halteres 

 whitish. Abdomen black, tawny beneath, adorned on each side above 

 with three transverse curved pale yellow marks ; tip pale yellow. Legs 

 luteous ; femora striped with black ; hind femora spotted with black on 

 the inner side ; tibiae with black bands ; hind tarsi piceous. 



Not common. (E.) 



Genus VII. MERODON. 



Mekodon, Fb. s. a. 71 (1805) ; LI. ; Mg. ; St. F. et Srv. ; Mq. ; Ct. ; 

 lldn. Syrphus p., Fb. s. i. ; Esi. ; Pz. Miisca p., Gm. Milesia p., 

 LL; Fb. 



Epistoma breve, Iceve. Antenna capite transversa conjunctim hreviores, 

 articulo quarto dorsali, quinto nudo vel pubescente. ScuteUnin sat 

 convexum, marr/ine non bene determinafo. Ala areola subapicali In- 

 tegra ad medium contracta, loho axilluri distincto, venis subcoslali et 

 radiali ad marginein disjnnctis, vena transversa prcebracliiali ultra 

 areolae discalis viedium inserta. 



Body broad, hairy. Head short, semicircular ; epistoma short, even, 

 without scapula, very hairy ; peristoma oval, somewhat straitened in 

 front. Eyes hairy. Labrum narrower towards the tip, which is notched 

 on both sides. Lingua subulate, acute, nearly as long as the labrum. 

 Maxillai subulate, bare, longer than the palpi. Palpi short, somewhat 

 clavate, beset with long bristles. Labium cylindrical. Antenna six- 

 jointed, porrect, nutant, approximate, seated on a tubercle, rather 

 low on the front, joinlhj shorter than the breadth of the head ; second 

 joint a little sliortcr than the first ; third conical, compressed, much 

 longer than the second ; fourth and fifth very short ; fourth seated on 

 the base of the third ; sixth setiform, stout, bare. Thorax almost ellip- 



