348 INSECTA. 



1753. Deep black ; thorax satin-red with a spine on each side 

 and two on the scutelium. On the trunks of old Oaks *. 



OxYCERA, Meig. 



The Oxycerae resemble the Ephippia in the shortness of their 

 antennae, which are also proAaded with a stilet ; but the third joint is 

 shorter, and not abruptly narrowed at the end ; if we look at the 

 profile of the antennae we observe that the stilet, longer and more 

 slender than in the preceding subgenus, and approximating more to 

 the form of a seta, is not terminal, but inserted on the back near the 

 summit. 



O. hypoleon; Strat. hjpoleon. Fab.; Panz., Faun. Insect. 



Germ., I, 14. Variegated with black and yellow; scutelium 



yellow, and with two spines f. 



There, the proboscis is long, slender, siphoniform, geniculate at 



base, and lodged in the inferior cavity of a rostrum-like projection 



of the anterior part of the head, bearing the antennae, of Avhich the 



form and proportions are similar to those of the Ephippia. 



Nemotelus, Geoff., Fab. % 

 In the others, the fourth joint of the antennae, together with the 

 third, forms an ovoid or globular club, terminated by a long seta. 

 The scutelium is rarely spinous. 



Chrtsochloha, Lat. — Sargus, Fab., 

 Where the third joint of the antennae is conical, and terminated by the 

 seta §. 



Sargus, Fab., 



Where the same joint is almost ovoid, or nearly globular, rounded 

 or obtuse at the summit, with the seta inserted on the back, near the 

 junction of the fourth || ring with the preceding one ; the first joint 

 is almost cylindrical. 



The scutelium is rarely spinous. The body is frequently elon- 

 gated, green or cupreous, and brilliant. 



S. cuprarius ; Musca cupraria, L. ; Reaum., Insect., IV, xxii, 

 7,8; De Geer, Insect., VI, xii, 14. Golden-green; abdomen 

 cupreous- violet ; legs black, with a white ring; wings long, 

 with a brown spot. 



The larva lives in cow-dvmg ; the body forms an oblong oval, 

 narrowed and pointed anteriorly, furnished with a squamous 

 head provided with two hooks. The body is interspersed with 

 hairs. It becomes a pupa under its own skin, and without any 

 material change of form. The perfect Insect issues from its 



* See Latreille, Meigen, and Macquar. 

 -f- Idem. 

 X Idem. 



§ Sargus amethysfinus, Fab. 



II The Sargi, whatever Meigen may say to the contrary, have the third joint 

 divided into four rings. 



