240 SYRPHIDjE. 



1. mutabilis, L. fn. 1807 (1761); Pz.; Fin.; Zit.apiformis, 

 Mg. ; Mq. ; Ct. ! b. e. 70. novus, Shr. i. a. -piger, Shr. f. b. api- 

 arius, Fb. auro-pubescens, LI. Nigro-chalybea, antennis nigris, alis 

 subcinereis, abdomine aureo-tomentoso apice ferrugineo, tibiis tarsisque 

 ferrugineis. Long. 4-5^; alar. 7-10 lin. 



Chalybeous-black, shining, clothed with pale hairs. Antennae black. 

 Scutellum ferruginous. Wings pale grey. Halteres luteous. Abdomen 

 covered with gilded down ; tip ferruginous. Tidies and tarsi ferruginous ; 

 tibiae with black bands. 



Bare. (E.I.) 



2. apiformis, Dg. i. vi. 56. 18 (1783). mutabilis? L. ; Ztt. 

 mutabilis, Gm. ; Fin. ; Fb. ; Mg. ; Mq. -plebeia, Shr. conica, Pz. 

 micans? Mg. Nigro-chalybea, antennis nigris, alis subcinereis, abdo- 

 mine cano-hirto, apice ferrugineo, tibiis tarsisque ferrugineis, metatarsis 

 fuscis. Long. 4-5 ; alar. 7-9 lin. 



Chalybeous-black, shining, clothed with pale tawny hairs. Antennae 

 black. Scutellum ferruginous. Wings pale grey. Halteres luteous. 

 Abdomen covered with hoary down ; tip ferruginous. Tibiae and tarsi 

 ferruginous ; tibiae with black bands ; metatarsi brown. 



Eare. (E.) 



Genus IV. EUMERUS. 



EUMERUS, Mg. zw. iv. 202 (1822) ; St. F. et Srv. ; Mq. ; Ztt. ; Lw. ; 

 Ct. ; Be. Syrphus p., Fb. e. s ; Pz. Eristalis p., Fb. s. a. Milesia 

 p., LI. Pipeza p., Fin. 



Epistoma recte descendens. Antennae capitis latitudine conjunctim bre- 

 viores, articulo quarto dorsali, sexto nudo vel pubescente. Scutellum 

 depressum, margine acuto. Alee areola subapicali Integra, venis sub- 

 costali et radiali margine disjunctis, vena transversa praebrachiali ad 

 vel ultra areolfs discalis medium locata, lobo axillari distincto. 

 Head semicircular, as broad as the thorax, somewhat depressed in 

 front ; face very hairy, slightly convex ; epistoma descending, straight, 

 not extending beyond the eyes, with no scapula; peristoma oval, 

 tolerably broad, somewhat acute in front, inclined upwards. Proboscis 

 short, thick. Labrum short, broad, truncated, notched and bilobed 

 at the tip. Lingua lanceolate. Maxillae short. Palpi linear, pubes- 

 cent, much shorter than the maxillae, their tips rounded and hairy. 

 Labium short, thick, cylindrical. Antenna jointly shorter than the 

 breadth of the Jtead, 6-jointed, approximate, porrect, nutant, diverging ; 

 first joint short ; second cyathiform, much broader ; third large, com- 

 pressed, round or somewhat obliquely truncated in front, or somewhat 

 pointed, with a fovea on the outside; fourth and fifth very short; 



