OALLIPTERUS BETULICOLA. 16 



other veins pale green. Body and legs pilose, but not 

 tufted witli cotton. The wing veins are not expanded 

 or clouded at their tips, as in G. hetulicola. A reference 

 to the plates will show that the venation also is dif- 

 ferently disposed in these insects, both of which, how- 

 ever, feed on the same tree. 



Apterous oviparous female. 



Inch. Millimetres. 



Size of body 0-165 X 0-075 4-18 X 1-89. 



Length of antennae 0-140 3-60. 



„ cornicles 0*007 0-17. 



Long and fusiform. Abdomen large and pointed ; 

 the last rings dilated much as in the genus Drepanosi- 

 plmm. Colour amber-brown or darker, with six or 

 seven interrupted rusty-brown cross-bars, the third, 

 fourth, fifth, and sixth of which are furnished with 

 round, whitish tubercles. Antennae and legs stout, 

 long, and green. Tarsi dark brown. Eyes red. 



The winged male is much like the winged viviparous 

 female. The perfect sexes may be captured in 

 October, at which time the female commences to ovi- 

 posit on the common birch and on the weeping variety 

 of the same tree. 



This fine insect is more common than G. hetulicola. 

 I have repeatedly taken it from August to October 

 near Chichester, and on the birches round Haslemere 

 in Surrey. 



Callipterus BETULICOLA, Kalt. (?). Plate LXXXYIII, 



figs. 1—3. 



Aphis behilicolay Kalt. (?), Walk. 

 Gallipterus betulce, Koch. 



Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0-110x0-035 2-80x0-88. 



