50 BEITISH APHIDES. 



Rostrum very long, last joint hastate. Legs brown, 

 and like the rest of the body, covered with ginger- 

 brown hair. Tarsi long. 



Several apterous specimens were sent to me from 

 the spruce firs at Walthamstow late in June, and in 

 July also I found this insect numerous at Branisliot on 

 the same conifer, Ahies excelsa. The winged males I 

 bred in confinement ; they emerged from their pupee 

 on July 26th. Like most of the Lachninge they were 

 very nimble and by no means easy to secure whilst 

 hiding amidst the pinnules of the fir sprigs. 



The apterous insect fairly agrees with the descrip- 

 tion given by Koch of his L. hyalinus ; and his figure 

 also fairly agrees with my insect. On the other hand, 

 the winged form of L. hyalinus is described as rusty 

 red, and as being very indistinct as to the third oblique 

 veins on the upper wings. Koch's figure of the winged 

 female differs very much from mine. I prefer, there- 

 fore, to mark L. hyalinus as a doubtful synonym. 



This insect may be separated from Lachnus agilis 

 by its less linear outline, its darker colour, its larger 

 head, its greater hairyness, larger stigma, and more 

 pronounced wing-veining. 



I cannot say whether each species confines itself to 

 one particular species of pine. 



Lachnus pini, Linn., Plate XCYII, figs. 3, 4. 



Aphis pini, Linn., Walk. 

 Lachnus pini, Kalt. 

 Aphis nuda pini, De Geer. 

 Pityaphis, Amyot. 



Apterous viviparous female. 



Incli. Millimetres. 



Size of body 0-140 X 0-075 3-55 X 1'89. 



Length of antennae 0*065 1*64. 



„ cornicles 0*005 0*12. 



