608 Prof. Westw@@@ on the minute Diptera 
Musca saltatrix. 
Linn., Fauna Suecica, p. 555; Appendix, No. 2319 ; 
Syst. Nat., p. 988. 
This insect is described by Linneus as found “in 
campis inter gramina saliens more Cicade.” The 
characters agree with those of a species of Chlorops 
which is very injurious to cereal plants, having the head 
yellow, with a black triangular spot on the vertex. 
‘Thorax a tergo lineis tribus longitudinalibus nigris 
quarum intermedia cum capite coheret, laterales vero a 
capite distincte.  Scutellum flavum. Abdomen supra 
fuscum lineis duabus flavicantibus. F'emora postica 
crassa.” (F'n. Suec.). 
The last-mentioned{character is omitted by Linnzeus in 
his ‘Systema Nature,’ as noticed by Mr. Haliday in his 
Paper on the Linnean Species of Diptera, published in the 
‘Stettiner Entomol. Zeitung,’ 1851, p. 143; as follows :— 
“* Musca saltatrix, Linn. = Chlorops teniopus, Meig.— 
Wahrscheinlich hatte Linné dies Stuck vor sich, als er in 
der Beschreibung im Syst. Nat. (xii., 988, 60) den cha- 
racter ‘‘femora postica crassa’? aus der Fna. Suec. 
welcher auf eine Meromyza Mg. deutet, ausliess.—Auch 
Geoffroy (Hist. i1., 508, 81; Ent. Paris, ii., 480, 32, 
Musca saltatrix) beschreibt een Chlorops, Mg.” 
Fallen thus describes the Oscinis saltatrix, ‘‘ Linn., 
Fn. 2319, vera” :— 
** Pallide virescens, thorace nigro-tri-lineato ; abdo- 
mine trifasciam nigro punctato, femoribus posticis crassis- 
simis.”—Diptera Suec. Oscin., p. 3. 
Zetterstedt (‘ Diptera Scandinavie,’ p. 4837), observes, 
under Oscinis teniopus :— 
** Osc. temopus (Chlorops ead. Meig.), in Mus. Linneano 
sub nomine ‘ Musca saltatrix’ occurrit (teste Haliday, 
Ent. Zeit., 1851, p. 143), qui non sine ratione putat 
Linneum hoc individuum ante oculos habuisse descri- 
bentem suam Muscam saltatricem in Systema Natur. 
xll., p. 988, 60 ubi nota illa characteristica ‘femora 
postica’ (in ‘ Fauna Suecica’ allata) exclusa fuit.”’ 
