APHIS ABIETINA. 43 



Apterous oviparous female. 



Very much of the form and colour of the viviparous 

 female. AntennaB half the length of the body. 

 Nectaries olive. Several of these insects, mixed with 

 the viviparous female, in December were taken feeding 

 in the open air on the Chrysanthemum. No males 

 could be discovered. 



This is a common species, and is one of the chief 

 pests in the hot-house. It feeds on various plants, as 

 the Tobacco, Verbena, Malva, Epilobium, Achillea, 

 Rumex, and Aquilegia. Within certain limits it varies 

 much, and chiefly as regards colour. As many as 

 seventeen varieties have been described by Walker in his 

 ' Catalogue of the Homoptera in the British Museum/ 

 vol iv, p. 970, 



The winged form, according to Koch, has two spines 

 on the prothorax. I believe this insect is A. malvce, 

 of Pass., but it must not be confounded with Siphono- 

 phora malvre of that author, which probably is S. 

 IJelargonii, of Kaltenbach. 



Aphis abietina, Walker. Plate XLIX, figs. 3, 4. 

 Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0*065 X 0-035 1-64 X 0-88. 



Length of antennae 0'040 1*01. 



cornicles 0*020 0-50. 



Bright green. Slightly mealy. Shagreened. Head 

 luteous. Abdomen long, oval, with a pointed apex. 

 Cornicles long and cylindrical. Two spots on the 

 head, and a row of dark green spots on the connexivum. 

 Tail about two thirds of the length of the cornicle. 

 Eyes red. Rostrum reaches to the third coxae. 



