joint of the anterior tarsi is shorter than the 5th ; the abdo- 

 men also is clothed with short depressed hairs in Leptis, 

 whilst it is more shining and pilose in Rhagio. Meigen de- 

 scribes the palpi as biarticulate. 



The following are the British species, which seem to be at- 

 tached to damp situations, as the sides of ditches, ponds, &c. 



1. aurata Fab. — atratus Fab. S - — tomentosus Fab. ? . — cin- 

 gulata Do7i. 1 3, pi. 465 S • 



"Aureous (c?)or pale yellow, tomentose ( ? ); halteres 

 and costal stripe fuscous : 3 to 4? lines long." 



" Taken in July on the hedges near the road-side about 

 Nutfield in Surrey:" Donovan. 



2. flaveola Meig. v. 2. p. 100. No. 17.— Genius Panz. 54.. 4? 

 "Pale yellow, tomentose; legs yellow; thighs fuscous; 



wings yellowish, stigma pale; halteres fuscous : S\ lines." 



End of May, Netley Abbey ; end of June in woods, Dorset; 

 and the females in marshes at Horning. 



3. helvola Meg.— Meig. 2. 100. 18. 



"Golden tomentose ; halteres fuscous ; legs rufous; thighs 

 fuscous ; wings light fuscous : stigma pale : 3 lines." 



June, Hampstead Heath : males beginning of August, 

 ditches. Sandwich. 



4. DiademaZww. — Curt. Brit. Ent.pl. 713. ? . — gracilis Cwt. 

 Guide ? . 



Male, 13th June, Coomb-wood: Females, beginning of 

 July near Cambridge, and 1st Aug. near Ventnor in the 

 Isle of Wight. 



Meigen having stated that the stigmatic spot of the wings 

 was fuscous and that the length of his insect was 3 lines, I con- 

 sidered my specimen, having at that time only the female, to 

 be a new species, which I called " gracilis,^^ but having since 

 obtained the male of Diadema, 1 think they are one and th e 

 same. 



The plant, Hutchinsia petraa. Mountain Pepper wort, was 

 communicated by the Rev. J. Howson from Malham Tarn, 

 Yorkshire, and by Mr. Thwaites from St. Vincent's Rocks. 



i 



