Syrphidae. 37 



plumata and homhylans ; St/rphus auricoUis both as auricoUis and 

 maculicornis and Platychirus manicatus both as manicatus and rostratus; 

 Jiis F. podagratus recorded from Denmark is no doubt erroneous; his 

 9 species of Sphaerophoria are in reality only 3 ; he has Chilosia 

 chloris both as chloris and fiavicornis, and vernalis both as vernalis 

 and pallidicornis ; of Pipiza two species are synonyms as P. campestris 

 and varipes are both Pipizella virens, and P. genicidata is identical 

 with P. himaculata ; Xylota pigra is recorded erroneously, and his 5 

 species of Neoascia are only 4 as quadripundata is a synonym to 

 floralis \ thus we must strike out in all 16 species and the total 

 number is then 1 10. Stæger published (Naturhist. Tidsskr. IV, 1842—43, 

 320) a paper over the Danish species of Platychirus, but the species 

 included in it are all mentioned by Zetterstedt. — In Naturhist. 

 Tidsskr. II, 1838—39 Schiødte published a list over Insects taken on 

 a collecting journey in Sealand, Lolland and Bornholm; it is only a 

 preliminary enumeration; it includes a number of Diptera (determined 

 by Stæger), but the species are all enumerated by Zetterstedt; on 

 p. 318 a new species CriorrJiina dimidiata is mentioned, but it is a 

 nomen nudum and the species must later have been recognised as 

 described. — To the 110 species enumerated by Zetterstedt come two 

 of Fabriclus's species which Zetterstedt does not mention from Den- 

 mark, viz. S. umbellatarum and Ferdinandea ruficornis; the total number 

 of known Danish Syrphids in 1849 was thus 112. — In the present 

 work 210 species are enumerated. 



Table of Subfamilies. 



1. Antennæ of moderate length, the two basal joints 

 together not longer than the third 2. 



— Antennæ elongate and porrected, the basal joints 

 longer or about as long as the third 5. 



2. Middle cross-vein placed before the middle of the 

 discai cell 3. 



— Middle cross-vein near or after the middle of the 

 discai cell, often rather oblique 4. 



3. Subcostal cell open, upper marginal cross-vein very 



rarely recurrent (Orthoneura) ; arista bare or only -y c, 



short pubescent I. Syrphinae. ^ O 



— Subcostal cell closed, upper marginal cross-vein 



recurrent above ; arista long-plumose II. Volucellinae. M" ( 



4. Cubital vein with a deep loop down in the tu'st 



posterior cell III. Eristalinae. ij- %y 



— Cubital vein not or only moderately dipped down 



in the first posterior cell IV. Milesiinae. ij %/ 



