242 SYRPIIID^. 



bands. Tibiae towards the base and knees ferruginous ; tarsi piceous ; 

 hind femora armed beneath with about 12 minute teeth. 



Generally distributed. (E.) 



4. Selene, Mg. zw. iii. 23 0. 12 (1822). jEneiis, antennis nigris, 

 thoracis dhco ccmo-hivittato, alls cinereis, ahdomine utrinque hmulis 

 tribus canis hciHi ferriujhieo, i^edihus n'ujris. Long. 2^; alar. 4 lin. 



^neous. Aidennce black. Thorax with 2 hairy stripes. Wings 

 grey. Halteres luteous. Abdomen with 3 arched interrupted hoary 

 hands, fe7TU(/inoHS towards the base. Legs black. 



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



Genus V. ERISTALIS. 



Eristalis, LI. d. h. n. (1804); Fb. ; Mg. ; St. F. et Srv. ; Mq. , 

 Lw. ; Ct. Miisca p., L. ; Dg. ; Gm. Cotiops p., Spl. Volucella p., 

 Shr. Syrphus p., Fb. e. s. ; Pz. ; Esi. Syrphis, Fin. ; Ztt. Elo- 

 phihis p., LI. Milesia p., LI. 

 Antenn(B artkido quarto dorsall. Ala areola snbaplcali Integra, lobo 

 axlllari distincto, venis subcostall et radiali ante marginem conjiinctis. 

 Halteres aliilis obtecti. 



Body broad. Head semicircidar ; epistoma somewhat depressed 

 above, with a distinct scapula near the peristoma; peristoma long, 

 narrow in front, inclined upwards. Labrum long, narrower towards the 

 tip, which is notched. Lingua acute, nearly as long as the labrum. 

 Maxillae subulate, curved, much shorter than the lingua. Palpi cylin- 

 drical, curved upwards, longer than the maxillae; the proportionate 

 length of the maxillae and palpi varies much in the different species. 

 Labium long, large, semicybndrical. Antennae approximate, seated on 

 a tuljercle iu front, 5-jointed, ])on-ect, nutant ; first and second joints, 

 small ; third patelliform ; fourth very short, seated on the base of the 

 third; fifth setiform. Thorax oval, haiiy; scutellum semicircidar. 

 Wings lanceolate, very shining, diverging; subapical areolet entire; 

 axillary lobe distinct; subcostal and radial veins meeting before they 

 reach the margin; alidae large, double, fringed. Halteres covered by 

 the alulce. Abdomen obconical. Hind legs longer than the anterior ; 

 hind tibiae curved, compressed towards the tips. 



These Hies are of large size, and some have much resemblance 

 to bees. The larvse live in hollow trees, in mud, in stagnant 

 water, in gutters, and in sewers ; they vary in form according to 

 the species, and are furnished with long tails for the purpose of 

 breathing. In the larva of E. tenax only the two first interuodes 

 of the spinal marrow are double, the rest being all single. The 

 fly has three ganglions in the thorax, and two in the abdomen. 



