DACTYLOPIUS CITRI. 167 



dew which these insects secrete ; the quantity, how- 

 ever, is not very great, but sufficient accumulates upon 

 the leaves of the food-plant to set up the characteristic 

 black fungus which invariably attends colonies of 

 mealy-bug and other coccids. 



My descriptions were made from a single colony of 

 insects in all stages on Abutilon. 



EXPLANATION OF THE PLATES. 



PL LXIV, fig. 1. Adult female (dorsal). X 15. 



Fig. 2. Antennae of adult female. X 150. 



Fig. 3. Anal lobe and anal orifice of adult female, 

 'x 150. 



Fig. 4. Men turn of adult female. X 150. 



Fig. 6. Group of spinnerets and spines on ab- 

 dominal segment of adult female. X 150. 



Fig. 7. Male, x 25. 



Fig. 8. Anal segment of male with genital armature 

 and long setse which support the filaments. X 1 50. 



Fig. 9. Antennas of the male. X 150. 



Fig. 10. Pupa, first stage. X 30. 



Fig. 11. Pupa, final stage. X 25. 

 PL LXVI, fig. 1. Larva after treatment with 

 potash (ventral). X 100. 



Fig. 2. Antenna of larva. X 250. 



Fig. 3. Anal segment of larva, showing the some- 

 what prominent character of the anal lobes. 

 X 250. 



DACTYLOPIUS LONGISPINUS (Targioni-Tozzetti). 

 (PL LXIV, figs. 12-15.) 



Coccus adonidum,* Boisduval ; Essai sur 1'Ent. 

 Horticole, p. 346, fig. 47 (1867). 



* Cockerell, < Proc. Acad. Nat. Sci. Philadelphia/ 1899, p. 261, states that 

 " there is no such thing as Dactylopius (Pediculu*') adonidum, Linn.," and 

 that " the name must, therefore, disappear from our lists." 



