328 CLASS viii. 



Sp. Hdophilus tenax, Musca tenax L., PANZER Deutschl. Ins., Heft 14, Nos. 

 23, 24, SCHELLENBERG, Tab. 9, fig. i ; common with us towards autumn, 

 and often mistaken by the uninformed for bees or wasps. The larva leaves 

 its hiding place in August and September, to undergo its metamorphosis in 

 chinks of walls. The body of the larva of this and of other species ends 

 with a long tail ; hence the French name Vers a queue de rat; they live in 

 cavities of stems of trees in which water is collected, in cesspools and 

 necessaries, and breathe by this tail. See GOED^ERDT Melam. Nat. I. Observ. 

 i, p. 20, Tab. ii. ; SWAMMERDAM Bijb. d. Natuur. pp. 644 646, Tab. 38, 

 fig. 9 ; REAUMUR Ins. iv. PI. 20, &c. 



Volucella GEOFFR. Syrphus FABR. Antennas with dorsal seta 

 plumed, mostly long. Abdomen oval or conical, thick, hirsute. 



Sp. Volucella intricaria, Syrphus intricarius (and Syrph. bombyliformis 

 FABR.), Musca intricaria L., PANZER Deutschl. Ins., Heft 59, Nos. n, 

 12, &c. 



The larva of one species, of which the metamorphosis is known, lives in 

 the nests of Bombus, and feeds on its larvae ; this is Volucella zonaria, 

 Syrphus inanis FABR., REAUMUR Insect. HI. pp. 482 485, PI. 33, figs. 

 15 19. The body of this larva is pointed before, broad behind, with six 

 rays disposed in a semicircle. They are also found in wasps' nests. 



Pelicocera HOFFMANNSEGG, MEIG. Antennse with short dorsal 

 seta, incrassate, triarticulate. 



c) Wings more than twice the length of the abdomen (incum- 

 bent, parallel). 



Brachyopa HOFFMANNSEGG, MEIG. 



ft Proboscis elongate (of the length of head and thorax). Head 

 porrect beneath into a conical beak. 



RJiingia SCOP., FABR. Wings incumbent, parallel. 



Sp. Rhingia rostrata, Conops rostrata L., PANZER Deutschl. Ins., Heft 87, 

 No. 22, DUMER. Cons. gen. s. L Ins. PI. 47, fig. 7. 



Family XI. Tanystomata. Antennse mostly with three joints, 

 the last setigerous. Proboscis exsert, containing an haustellum 

 composed of four or six setae. 



Longbeaks. The larvae resemble oblong worms, and have no 

 feet; they have ordinarily a horny and hard, others a soft head, 

 but which is constantly provided with hooklets or retractile append- 

 ages, of which they make use in gnawing or sucking their food. 

 The most live underground. They moult before changing into 



