Insects, etc., Injurious to Currants. 



219 



differ much from the windless female or hirva. The winged vivi- 

 parous feuuile, which arises from the pupa, is ye.nowisli-greeu Avith 

 blaclc head and antenn;c; the thorax is black witli a yellow V)and 

 in front; the abdomen is a bright yellowish-green, with dark spots 

 and patches on the fiaid^ and sides; yellow honey-tubes, swollen 

 towanis tlie apex ; legs ochreous, with the joints and the feet lilack. 

 These winged females fly from bush to bush. In the autumn or 

 late summer males and egg-laying females are formed; the egg- 

 laying female, after being I'ertilised, deposits a few brown elongated 

 eggs on the last year's gi-(jwth of a twig just under the broken rind or 

 upon it. Here the eggs 

 renurin all the winter. 

 This aphis, besides feed- 

 ing im the red, black, and 

 white currant, also attaclvs 

 the gooseberry, and it has 

 been found in the Guelder 

 Eose, the Xipple Wort, 

 and the Sow Thistle. 

 Walker many 3'ears ago 

 suggested that this S};)ecies 

 flew to the lettuce as its 

 second host plant, and 

 from what I have ob- 

 ser\'ed I am inclined to 

 think this is correct, for 

 I can detect no difference 

 in the aphides found on 

 lettuce in the late sum- 

 mer, and certainly this 

 species leaves the currants in great numbers in late summer. 



(If.) J///,;:^^s• rlblx, Linn. — This plant louse can easily be dis- 

 tinguished from the foimer, with a lens, by its olive, not black, head, 

 and its black honey-tubes and irregularly black ornamented alxlomen 

 in the winged female. It occurs from April to August, especially 

 in the black currant and gooseberry, Ijut also on the red currant; 

 it is said to cause blisters similar to (I.). It often causes the leaves 

 at the apex of the shoots to curl and twist up. I have never been 

 able to find any Idisters formed by it. 



The wingless female, which appears in the spring, is shiny 

 yellowish-green, with ilark green mottlings, elongated oval in form, 

 and with curious hairs in front; the honey-tulies and legs are 



|.l. V. II. IHulnul. 

 '.VST SLCIN 01; E.\i;\"n M III" ,\N .\IM1IS. 



(i^Jreatly eiilai'i-a'il.) 



