549. 

 MUSCA CHLORIS. 



Order Diptera. Fam. Muscidae. 



Type of the Genus, Musca Ceesar Linn. 

 MtiscA Linn., Fab., Meig., Curt. — Chrysomya, Lucilia, Pyrellia and 

 Pliormia Desv. 



Antennes rather long and received into a cavity in the face, ap- 

 proximating at the base, nutant, and 5 -jointed, basal joint cup- 

 shaped, 2nd a little longer and obtrigonate, with several short 

 and one long stout erect bristle at the apex, 3rd long linear- 

 prismatic, compressed and pubescent, 4th minute, inserted at 

 the base of the 3rd, 5th a little larger, 6th forming a long seta 

 stout at the base, producing long bristles on both sides (3). 

 Labrum shorter than the lip, stout rigid and hollow (1 b). 

 Tongue short broad and thin (c). 



Maxillce and Mandibles none. Pa/pi long pilose and clavate (/). 

 Lip rather elongated and terminated by 2 pilose lobes {g). 

 Males smaller and sometimes more bristly than the females. Head short 

 trigonate above, face somewhat orbicular and slightly concave: eyes 

 ovate, sometimes partially contiguous in the males, always remote in 

 the females (2$): ocq\]S. minute, 3 in triangle on the crown. Thorax 

 orbicular-quadrate, with a transverse suture ; scutellum semi-orbi- 

 cular. Abdomen orbicular-ovate in the male, more trigonate in the 

 female, 4-jointed, basal joint very short. Wings divaricating, with 

 2 marginal transverse nervures, the apical one oblique ; casta spiny 

 at the base ; squamulse rather large and concealing the halteres 

 which are small and capitate. Legs, anterior the shortest: thighs, 

 middle pair a little the longest : tibiae bristly, intermediate with se- 

 veral long bristles at the apex and 2 below the middle (8 * the thigh 

 and tibia) : tarsi 5-jointed, basal joint the longest : claws distinct : 

 pulvilli bilobed. 

 Eggs elongate ovate. Larvae attenuated to the head, truncated behind. 

 Pupae coriaceous and oval. Roesel v. IL tab. X. 



Chloris Hal., Ent.Mag. 1. 165. — Curt. Guide, Gen. 1286. 



Bright shining green, either inclining to blue or tinged with 

 gold : a black stripe down the crown of the head to the antennae 

 which are black, the 3rd joint gray ; trophi black ; face hairy, 

 silky white, cheeks green ; eyes brown, divided by a narrow 

 space in the male, by a broad one in the female ; legs black, 

 thighs slightly cupreous: wings with the angle of the 4th ner- 

 vure rounded. 



In the Cabinets of Mr. Haliday, Mr. Clifton, and the Author. 



The genus Musca comprises amongst others those insects 

 which deposit their eggs on meat, and are commonly known by 

 the name of Blue-bottle flies, long and interesting accounts of 

 which will be found in " Kirby and Spence's Introduction" 

 and other works. They vary considerably in structure, for 

 whilst the eyes of some of the males meet in the middle, they 



