322 CLASS vin. 



phora MACQ., (Calliphora KOBIN., Mufetia and Melinda ROBIN.), 

 Lucilia MACQ., (Lucilia KOBIN., Phormia and Pyrellia ROBIN.), 

 Ochromyia MACQ. 



Z>) Feet moderate. Seta of antennce naked at the apex. 



Sub-genera : Onesia ROBIN., Cynomyia ROBIN., Agria ROBIN., 

 MACQ. (Agria, Gesneria, Clyto ROBIN.), Sarcophaga MEIG., Phrisso- 

 podia MACQ. 



c) Feet elongate. 



Sub-genera : Dexia MEIG., Prosena SATNT-FARGEAU and SERV., 

 Diner a ROBIN., Scotiptera MACQ., Rutilia ROBIN. 



To the division a) the common house-fly Musca domestica L., belongs, 

 SCHELLEN. Tab. i., J. C. KELLER Geschichte der germeinem Stuben-fliege, 

 mit 4 Kupfertafeln. Niirnberg, 1764, 4to. The larvae live especially in 

 horse-dung, and these insects are only found in the neighbourhood of human 

 habitations. In a month's time one generation succeeds another, for the 

 larva is full grown in fourteen days ; the fly also after fourteen days comes 

 from the pupa, and the egg has only to lie a single day before the young 

 maggot creeps out. Hence it is that they multiply so astonishingly, and that 

 in warm summers, especially at the beginning of autumn, they may prove 

 so numerous. In the open country and on the roads various species of fly 

 are met with of the same size, which are usually confounded with them, as 

 Musca corvina FABR., PANZER Deutschl. Ins., Heft 60, Tab. 13, Musca 

 nigripes male, Heft 105, Tab. 13, Musca ludifica fern. Also the unspotted, 

 gold-green glistering Musca ccesar L., the blue flesh-fly Musca vomitoria, 

 L., (Calliphora fulvibarUs ROBIN.), ROES. Ins. n. Mus. et Culic. Tabs. ix. 

 x., PANZER Deutschl. Ins. Heft x. Tab. 19, which has a shining blue 

 abdomen with black stripes, the head black with red-brown palps. This 

 fly has a fine sense of smell, and readily penetrates into houses in summer 

 to lay its eggs on meat in kitchens and larders. The same applies to those 

 belonging to the 



Division 6) Musca carnaria L., (Sarcophaga carnaria MEIG.,) REAUM. 

 Ins. iv. Tab. 28, figs. 2, 8, DE GEER Ins. vi. Tab. 3, figs. 518, Cuv. 

 JR. Ani. ed. ill., Ins. PI. 178, fig. 2 ; still larger than the former, abdomen 

 grey with black spots ; black antennae and palps. It has been estimated 

 that the progeny of a single female of this species may in one summer 

 amount to more than 500 millions of flies l . 



2) Seta of antennce downy or naked MEIG. (Species of TJiereva 

 FABR.) 



1 MEIGEN Syst. Besch. der Eur. Zweiflug. Ins. v. s. i, " Hatte die Natur also 

 Keine mdchtigwirkenden Gegenanstalten zur Vertilgung getroffen . ... so wilrde dieset 

 Herr den Menschen wohl wenig Fkisch ubrig lassen, und die Fastentage wlirden stets an 

 der Tagesordnung seint" 



