which attack cereal crops. 625 
According to Mr. Haliday this insect is identical with 
the Musca Frit of Linneus. It is certainly closely allied 
to Oscinis pusilla of Fallen and Zetterstedt. 
Oscinis granarius, Curtis (‘Farm Ins.,’ p. 298). 
Black and shining, with a greenish cast; head trans- 
verse, semi-orbicular; antenne black and orbicular, with 
a short pubescent seta. Eyes large, remote, oval; 
thorax nearly quadrate; scutellum semi-globose ; ab- 
domen of the female ovate-conic, apparently 5-jointed ; 
wings transparent, iridescent; nervures dark, exactly 
like O. vastator; balancers with ochreous white club ; 
legs black (?), the first pair lost, four posterior, with the 
basal joint of tarsi, dirty ochreous, and tip of intermediate 
tibie of same colour. 
Reared from a grain of wheat of a rosy colour, from 
which the farina had been squeezed out possibly in 
picking it from the ear. It was of a pink colour, and 
from amongst it protruded an empty pupa-case of a 
rusty ochreous colour, from which the fly had been 
produced. 
Distinguished from O. vastator by the base of the 
shank being black instead of ferruginous. 
‘“‘Neither is it the Musca Frit of Linneus, which I 
doubt not is a Chlorops.” 
Oscinis pusilla, Meigen.* 
In a memoir published by Herr Kuhn in the ‘ Mit- 
theilungen des landwirthschaftlichen Centralvereins fur 
Schlesien’ (1859), x., p. 185, an account is given of the 
injury committed by this little species on rye and white 
wheat. ‘‘Sie lebt in Gesellschaft mit Musca Frrit, 
Cereris, &c., rit welcher in ihrer Wintergeneration aus 
Roggen und Weizenpflanzchen erzogen wurde, und kommt 
entschieden mit ihr auch an Wiesengrasern vor.” 
M. Boisduval (‘ Les insectes nuisibles,’ 1862, p. 282), 
describes the history of Cecidomyia tritici and its para- 
sites, Oscinis vastator, Curt., Chlorops lineata, Gueér., 
C. teniopus, Meig., C. Herpini, and C. pumilionis. 
* «* Nigro-sznea, femoribus nigris tibiis tarsisque pallidis ; scutello 
plano. Wabhrscheinlich ist diese Art, Oscinis Frit, Fall. Var. 3, 
tibiis tarsisque pallidis.” Meigen, vi., p. 157. 
TRANS. ENT. soc. 1881.—parr Iv. (DEC.) 4m 
