Miscellaneous. 75 



Simulia sericea, Meig. Lives in Sparganium ramosum, branched 



bur- reed. 

 Rhyphus fenestralis . Lives in Racodium cellare. 

 Xylophaga atra, JVIeig. Lives in the dry wood of Carpinus Betulus, 



the hornbeam. 

 Syrphus variabilis, Meig. Lives in the stems of Carduus nutans, 



musk thistle. 

 Ant homy a platura, Meig. Lives in Allium Poi'rum, the leek. 

 exilis, Meig. Lives within Rumex Acetosa, the sorrel, and Po- 

 lygonum amphibium, spotted persicaria. 

 Trypeta 8-punctata, Macq.^ Lives in the root of Tragopogon, goat's-beard. 



cognata, Meig. Lives within Tussilago Farfara, colt's-foot. 



elongatula, Loew. Lives in the receptacle of Bidens cernua, 



nodding bidens. 



flavicauda, Meig. Lives in the receptacle of Arctium, burdock. 



marginata. Fall. Lives in the receptacle of Senecio vulgaris, 



groundsel. 

 pupillata, Fall. Lives in the receptacle of Hieracium sylvati- 



cum, wood hawkweed. 

 colon, Meig. Lives in the receptacle of Centaurea scabiosa, 



greater knapweed. 

 cuspidata, Meig. Lives in the receptacle of Carduus nutans, 



musk thistle. 



Zo'e, Weid. Lives within Arctium, the burdock. 



radiata, Meig. Lives in the receptacle of Senecio vulgaris. 



groundsel. 

 Heraclei, Linn. Lives within Heracleum Sphondylium, cow 



parsnep. 

 Arctii, Meig. Lives in the receptacle of Centaurea Jacea, brown 



knapweed. 

 arnicivora, Loew. Lives in the receptacle of Arnica montana, 



mountam arnica. 



— parietina, Linn. Lives in the stems of Artemisia vulgaris, 

 mugwort. 



producta, Loew. Lives in the receptacle of Apargia hispida, 



rough apargia. 



— vespertina, Loew. Lives in the receptacle of Hypochceris ra- 

 dicata, h.ng-rooted cat's-ear. 



— Sonchi, Maig. Lives in the receptacle of Sonchus asper, S. ar- 

 vensis, corn sow-thistle, Apargia autumnalis, autumnal c'])argia. 



Leoniodontis, DeG. Lives in the receptacle of Chrysanthemum 



leucanthemum, ox-eye daisy, and in that of Crepis biennis, bien- 

 nial crepis. 



Drosophila Brassicce, Kalt. Lives within the leaves of Brassica Na- 

 pus, rape. 



Phytomyza Arciii, ICalt. Lives in the leaves of Arctium minus, the 

 small burdock. 



• Senecionis, Kalt. Lives in the leaves of Senecio Jacobcea, rag- 

 wort, and S. vulgaris, groundsel. 



Helosciadii, Kalt. Lives in the leaves of Helosciadivm nodi- 



fiorum, procumbent water-parsnep. 



