386 



Surrey, Hampshire, and Huntingdonshire, and I have taken it in 

 Devonshire, Cornwall, Worcester, Hertfordshire, and Shropshire. 



It lives in dense clusters up the flower-stalks of the Meadow 

 Sweet {Spirœa ulmaria), usually one closely fixed behind the 

 other. They are very timid and fall to the ground at the least 

 shock in all stages, whilst I have found that M. pisi sticks fairly 

 tenaciously to the pea when young, but by no means always. 

 I have found this Aphis from May to June as apterous females; 

 nymphae commence to appear from the first week in June and 

 alate females from then on to July, when it disappears from 

 the Spiraea. Frequent trials to plant this Aphis on cultivated 

 peas at various times have always ended in failure. 



Species 5. Macrosiphiim get Koch, Siphonophora gci Koch 

 (PI. XIV, figs. 4, 7 B). 



Winged Viviparous Female. — Green and very similar to the 

 former ; the antennae are darker and the legs may be a darker 

 green than in the former, there being a dark area at the apex 

 of the femora and tibiae and dark tarsi, and the thoracic lobes 

 may be darkened. The ensiform cauda is yellowish green ; the 

 cornicles are green with dusky apex, which is reticulate, and 

 below are a few transverse lines. Third segment of antennae 

 with 14 to 16 sensoria in a line extending for rather more than 

 half the length of the segment, none on the remainder. 



Wingless Viviparous Female. — The cornicles the same as 

 in the alate form. The third segment of the antennae with 

 three sensoria near the base. Cornicles dark at their apices. 



Nymph. — Cornicles imbricated for their whole length, and 

 darker than in the other two stages. Antennae without sensoria 

 on segment three. Wing-buds dark brown and cornicles dark. 



Abundant in Kent, Surrey, Sussex, Hampshire, Hertfordshire, 

 and Essex on the Wild Avens {Geiim urhanum), forming dense 

 clusters up the flower-stalks closely packed together. They fall 

 readily, as does the previous species. This species occurs from 

 the end of April through into June. Nymphse appear at the end 

 of May, winged females in June, and by the first week in July 

 they have mostly left ; all have gone by the second week. I 

 have never been able to take them on the wing or find an alter- 

 native host plant. 



Many attempts have been made to plant this Dolphin on 



