240 SYRPHIDiE. 



1. mutabilis, L. fn. 1807 (1761); Pz.; Fin.; Ztt.— apif or inis, 

 Mg. ; Mq. ; Ct. ! b. e. 70. — ttovus, Slir. i. a. — piffer, Shr. f. b. — api- 

 amis, Fb. — auro-pubescens, LI. Nigro-chalybea, antennis nigris, alls 

 snbciiiereis, abdom'ine am-eo-tomeutoso apice ferrugineo, tibiis tarsisque 

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



Clialybeo US-black, shining, clothed with pale hairs. Antennae black. 

 Scutellum ferrnginons. Wings pale grey. Halteres luteous. Abdomen 

 covered tcith gilded down ; tip ferruginous. Tibia and tarsi ferruginous ; 

 tibiae with black bands. 



Eare. (E.I.) 



2. apiformis, Dg. i. vi. 56. 18 {11 ^'i).— mutabilis'^ L. ; Ztt.— 

 mutabilis, Gm. ; Mn. ; Fb. ; Mg. ; Mq. — plebeia, Shr. — conica, Pz. — 

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

 miue cano-Uirto, apice ferrugineo, tibiis tarsisque ferrugineis, metatarsis 

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



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

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

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

 ferruginous ; tibiae with black bands ; metatarsi brown. 



Eare. (E.) 



Genus IV. HUMERUS. 



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. Pipezu p.. Fin. 



Epistoma recte descendens. Antennce capitis latittidine conjunctim bre- 

 viores, artictdo quarto dorsali, sexto nudo vel pnbescente. Scutellum 

 depressum, margine acnto. Alfe areola subapicaU Integra, venis sub- 

 costali et radiali margine disjunctis, vena transversa prcebrachiaU ad 

 vel ultra areolcB 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 scapida; 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 head, 6-Jointed, approximate, porrect, nutant, diverging; 

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

 pressed, round or somewhat obliquely ti'uncatcd in front, or somewhat 

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



