42 BRITISH APHIDES. 



The winged females are, he remarks, very similar to 

 those of Anisojphleba hamadyas (Chermes laricis ?), 

 but they want the tubercles which stud the body. 

 Again he remarks that this insect has a close affinity 

 to Chermes corticalis of Kaltenbach, which insect is 

 not, however, included in the list given by Koch. 



It is to be regretted that the illustrations of 

 Chermes in Koch's ' Pflanzenlause ' are far from satis- 

 factory. They give but little help in identifying the 

 species he describes. 



Kaltenbach adds to his list of Chermes Gh. strobi- 

 lobius, which has not yet been noticed in England. It 

 forms a yellow pegtop-shaped gall (Zapfenartigen) 

 swelling towards the ends of the twigs of Pinus 

 abies. 



Genus XXXI.— PHYLLOXERA,* Boyer de Fonsc, 



KoLBENLAUS. 



Rostrum moderately long in the winged insects, but 

 entirely wanting in the perfect sexes. 



Antenna) three-jointed, the first and second short,and 

 nearly equal. The third joint much the longest, 

 roughly imbricated, with a circular tubercle near its 

 base, and a longer, somewhat inconspicuous, tubercle 

 towards its apex. 



Eyes small and almost rudimentary in the apterous 

 females. 



Legs very short ; tarsi single-jointed, each furnished 

 with two claws, two capitate bristles, and a cushion- 

 like pad or pul villus. 



Wing-membranes delicate; upper wing with a well- 

 marked cubitus, from which spring three faint, oblique 

 veins without any furcation. Lower wing with a vein- 

 less cubitus. 



Body globular in the queens, fusiform or ovate 

 * From <p{i\\ov, a leaf, and Zvpov, withered, or from Knpalvaj. 



