CHERMES ABIETIS. 29 



The pseudovarian sacs are very numerous in the 

 pupge of Ch. abietis. The small anterior chambers of 

 the pseudovaria are filled with a green granular 

 matter; whilst the larger posterior chambers show 

 well-marked indications of the ova, which nevertheless 

 cannot get their full development until the imago has 

 emerged from the pupa. The exuviae of the pupa are 

 quite white, and perfect as an investing shell, just as 

 we see in Aphis proper. 



The cavities of the bodies of these Chermesinse are 

 filled with minute, green, nutritive granules, which 

 pass into their hollow legs, and these globules show their 

 freedom by their change of position at each moment 

 that a contraction is made by the insect. The pulsa- 

 tion of the dorsal vessel also may be readily seen, if 

 the winged insect be immersed alive in weak glycerine, 

 under which solution it will survive with a diminished 

 activity for some hours. 



Winged female. 



Inch. Millimetres. 



Expanse of wings 0*270 6*85. 



Size of body 0090x0-045 2-28xM3. 



Antennas 0*020 0'507. 



Cornicles None. 



Vertex flat. Head broad; eyes brown. Antennas 

 short, 5-jointed; last three joints imbricated. Pro- 

 thorax dilated to the full width of the body and marked, 

 by a somewhat triangular lobe. Mesothorax with two 

 large and two smaller lobes. Post-thorax long and 

 narrow. Abdomen oval, very shining, and sparsely 

 clothed with waxy filaments. Cauda not visible ; but 

 two prehensile hooks and a short ovipositor can be 

 extended at the will of the insect. The whole insect 

 is of a fine golden-brown colour, which deepens by 

 age. Legs green and very short. 



"Wings broad and somewhat pointed; when first 



