626 ‘Prof. Westwolf on the minute Diptera, &c. 
} 
Taschenberg (‘Naturgesch. d. wirbellosen Thiere,’ 
1865), describes the following Muscide as injurious to 
cereals :—Chlorops teniopus, C. strigula, Fabr., C. lineata, 
C. nasuta, C. (Oscinis) Cereris,* Oscinis Frit, O. pusilla, 
and Siphonella pumilionis. 
Lastly, in the ‘ Bulletin de la Sociéte impériale des 
Naturalistes de Moscou’ for 1880, No. 8, p. 126, is 
contained an interesting memoir by Prof. K. Lindeman, 
upon ‘‘ Zwei neue dem getreide schidliche Insekten 
Russlands,” namely, 1, Hurytoma hordei of Walsh, the 
larve of which produces dilatations on the stems of 
rye (hence known under the name of the knot-worm) ; 
and 2, Cecidomyia cerealis, the larva of which appears to 
be identical with the insect known in North America 
under the name of the joint-worm. 
EXxpuANATION OF PuatE XXII. 
Fie. 2. Oscinis avene, Bjerkander, magnified. 
2a. Natural size of ditto. 
2b. Head of ditto, seen sideways. 
2c. Parts of mouth, highly magnified, showing the clavate 
setose palpi, the acute horny tongue, and the large 
bilobed lip. 
2d. Parts of mouth, highly magnified, displayed by vertical 
pressure. 
2e. Mouth and antenna of ditto, magnified, seen partially 
sideways. 
3. An oat with the outer scales removed. 
3a. Ditto, with the inner scales opened, showing the 
withered plumose style (a), and the empty shell of 
the Oscinis pupa (6). 
* Osc. Cereris, Fallen, op. cit., p. 5. ‘‘Nigra nitida; fronte, 
pectore, scutelloque albis, pedibus testaceis.” 
Another species is described by Fallen under the name of Osc. 
messoria, op. cit., p. 5, which is evidently connected with cereal 
plants :—‘ Nigra, nitida, capite albo, pectore flavo vario, genubus 
tarsisque testaceis. Hab. In agris demessis Scanie sat frequens.” 
