152 



[July. 



from tlie aocompanying figures (a, h) tliat the tibia of this limb is 

 markedly dilated, and that its outer area is crowded with minute circular 

 pores. Similar but more scattered [wi-es t)eeur on the inner area of the 

 femur. Tlie anterior and mid limbs are without either of these 

 characters. This dilation of the tibia does not, however, appear to be 

 a strictly specific character, for of American examples received from 

 Mr. G. F. Ferris, some exhibit this structure while others do not. 



I have for some time noticed the presence of such pores on the 

 hind limbs of various Coccidae, sometimes on the coxae, sometimes on 

 the femur, or, as in maritiiniix, concentrated on the tibiae; but have not 



Fig. 4. — Pseudococcus maritimus. Adult 9 : «. lu"d leg, X 80 ; b, tibia of 

 hind leg, X 220. 



observed them on either the anterior or mid limbs. Analogous charactei's, 

 in the form of translucent maculae, are to be found on the hind coxae of 

 many species of Eriococcus. Their repeated presence, on the hind limbs 

 only, suggests that these pores must have some function, possibly in 

 connection with the process of oviposition. 



Ps. niarifinuts wa^ recorded (in the British Isles) from a green- 

 house in Camberley, last year only ; but has probably been an unrecog- 

 nized occupant of our glass-houses for some time past. I found it, in 

 April .of last year, infesting plants of Neriitm and Abutilon under glass 

 at Truro (Cornwall), and I have examples of the same species from 

 conservatories in Manchester. 



{To he confirmed.) 



