146 BRITISH APHIDES. 



into bunches, which sometimes are of a fine red, and at 

 other times of a golden-yellow colour. These masses 

 at a distance might even be taken for inflorescence of 

 the plant. The Aphides swarm within these cavities, 

 which are partly lined by the natural down of the 

 plant, and partly by the mealy secretions of the insect. 

 Mr. Charles Barrett forwarded insects to me from 

 Brandon, in Norfolk, early in August, at which time 

 both winged and apterous forms were fairly plentiful. 



A reference to Passerini's description of Aphis arte- 

 misice will show that Gryptosiplium artemisice has much 

 in common with it. Yet, as to the apterous viviparous 

 female, for colour he gives " fusco-rubiginosa — an- 

 tennae breves a basi ad medium albo-luteolas, casterum 

 fuscse, . . . Cauda obliterata. Pedes brevissimi fusci." 

 Again, for the winged females, " nectaria et cauda 

 nulla, &c." 



The habitat is " in Artemisia vulgaris foliis superi- 

 oribus bullato-revolutis," the apices of the branches 

 being drawn together, " veluti in gallam." 



A comparison of this diagnosis with my own will 

 show some important differences as to colour, and the 

 possession or not of a tail. Such being the case, it 

 will be hardly safe to decide without a reference to the 

 two living insects that they are identical, though it is 

 not impossible that they are so. 



Passerini corrects, in his later work, ' Aphididas 

 Italicee,' Aphis artemisice, into A. gallarum, Kalt., and 

 gives a reference which I have not been able to consult, 

 viz. * Die deutsch. Phytoph. aus der-Kl. der Ins.' 



Genus XV. BPACHYCOLUS,* Buchton. 



Vertex rather flat, frontal tubercles none. 

 Antennge very short, seven-jointed. First and second 



* fipaxvc, sliort J KwXov, a limb. 



