328 Undescribed Aphides. 



indeed, they are always in this genus less plentiful than 

 the apterous females, if we except the gall-makiug 

 Chermcs of the spruce-fir. 



In the consignment made to me from a garden at 

 Ealing, Middlesex, the insects were congregated on the 

 stems below the attachments of the galls ; and several 

 were surrounded by their shining honey-coloured eggs. 

 The produce of these eggs probably are the gall-makers, 

 and these females become prolific within the juicy 

 distortions they make on this conifer. 



Explanation of Plates IV., V., VI., & VII. 



Plate IV. — Aphis critJimi. 

 Fig. 1. The apterous female. 



2. Pupa of the same. 



3. The winged imago. 



4. Antenna of the same. 



5. Sheath and three setae of the rostrum. 



6. Tarsus and claws. 



Plate V. — LacJitius pitii. 



1. Apterous viviparous female, with exserted proboscis. 



2. The pupa. 



3. Winged viviparous female. 



Plate VI. — Tlielaxes hetulina. 



1. Apterous viviparous female. 



2. The same, but of a later brood. 



3. The pupa. 



4. The imago. 



.5. Part of the head, showing the eye with its supplemental 



lenses, and the antenna. 

 6. Tarsal joint. 



Plate VII. — Chermes taxi. 



1. Coccus-like larvae, showing the anal end, from which the 



flocculent substance is extruded. 



2, Another specimen, with her eggs, a cast skin, and the silky 



attachment. 

 B. A sprig of yew, with five bunches of cells or pseudo-galls, 

 fabricated by the above insects. 



