80 THE ENTOMOLOGIST. 



I found a single colony only of this very pretty pink Aphid 

 living in the young flower-tufts of the spurge. The young were 

 also pale semi-transparent pink. It is an extremely skiggish 

 species, with the antennae carried over the back in repose. 



I cannot identify this insect with any so far described from 

 Euphorbia, namely, Macrosiphum cyparissa, Koch ; Macrosiphum 

 (AcyrtJiosiphon) cyparissce propinquum, Mordwilko ; Aphis euplior- 

 hice, Kaltenbach ; and Aphis euphorbia, Walker, the last a pale 

 saffron species with short antennae. 



26. Macrosiphum {Acyrthosiphon) qenistcB, Mordwilko (' Faun, 

 d. 1. Eussie,' p. 144, 1914). 



On various species of Genista growing at Wye I found a 

 number of green Aphides in June, 1915, both alatae and apterse. 

 They swarmed on the foliage and seed-pods and on the stems. 

 These insects answer so closely to Mordwilko's Latin description 

 of his Acyrthosiphon genista that I am recording it as that insect 

 (unfortunately I cannot read the detailed Russian description). 

 The third segment of the antennae of the apterous female has 

 1-2 sensoria at its base ; that of the alate female 20-26, spread 

 over most of its length. The long thin green cornicles reach to 

 about the level of the tip of the rather large green cauda ; the 

 Cauda has five prominent hairs on one side, four on the other, 

 and a subapical one. The cornicles slightly expand basally and 

 are imbricated. 



This Genista species comes very close to pisi, but as far as 

 I can see the alate female differs in having many more sensoria 

 on the third antennal segment. 



27. Myzus festucce, nov. sp. 



Alate viviparous female. — Head and thorax brown, the thoracic 

 lobes being more darkened ; abdomen green with two rows of black 

 spots on each side. Antennte longer tban the body, dark brown, 

 except the base of the third segment and apex of the sixth ; first 

 segment much larger than second ; third a little longer than fourth 

 and not as long as the sixth, with 15-20 round sensoria along the 

 whole length more or less in a line ; fourth a little longer than fifth ; 

 basal area of sixth about one-fourth the length of the flagellum ; all the 

 segments imbricated. Proboscis rather broad, reaching to the base 

 of the second pair of legs, dusky at the apex. Eyes large and black. 

 Cornicles green, varying from dull green to pale brownish-green, 

 rather more than one-third the length of the abdomen, cylindrical, 

 well flared at apex and faintly imbricated. Cauda green, much 

 thicker than cornicles and about half their length ; finely spinose, 

 with three lateral hairs on one side, two on the other, and one bent 

 subapical one. Legs green, apices of tibiae and tarsi dark, moderately 

 long ; tibijE with a few short stiff' hairs. Wings normal. 



Length, 1-8 to 2 mm. 



Apterous viviparous female. — Pale yellowish-green, pale green. 



