158 DIPTEROUS NOTES AND QUERIES. 



the axils of the leaves, or terminating the branches, or a3 knob- 

 like projections from the roots, and were round or oval, 

 yellowish-green, densely hairy, and composed of stunted 

 succulent leaves closely packed together. Each gall con- 

 tained three or four Dipterous larvae, about one-tenth of an 

 inch long, ovate elongate, somewhat flattened above and 

 below, white, with a broad brownish yellow streak, ex- 

 tending from the second to the penultimate joint on the 

 underside. 



XI. The common Ground Ivy, Glechoma hederacea, is 

 attacked by the larva of a Dipterous insect, and produces a 

 gall-like excrescence at the apex of the branches. The gall 

 seems to be composed of a greatly distended and succulent 

 leaf, folded together and soldered at the margin, forming a 

 rounded pointed ball, nearly one-third of an inch in diameter, 

 densely clothed externally with woolly pubescence. I have 

 seen this gall in the vicinity of Mickleham during the 

 month of August. 



XII. During the month of August, while hunting over 

 the broken ground at East Wear Bay, near Folkestone, for 

 insects, my attention was arrested by observing an umbel of 

 seed vessels of the common carrot, Daucus earoia, having 

 one seed vessel among the number of a much larger size in 

 proportion to the rest, greatly distended to a nearly spherical 

 form, and much more free from bristles than these seed 

 vessels usually are. Generally one only was found in an 

 umbel, and on looking carefully to a great number of umbels, 

 I found the fact observed to be very common. Further 

 examination showed me that each of these inflated seed 

 vessels or carpets contains one or two bright orange, very 

 active Dipterous larvae, about the one-eightieth of an inch 



