166 DACTYLOPIUS CITRI. 



valve. Caudal setae very long. Puparium of the 

 male narrowly elongate, formed of loosely felted white 

 filaments. 



Male pupa, first stage (PL LXV,fig. 10), pale reddish- 

 brown, with the margins of the head and thorax con- 

 tinuous with the body ; wing-sheaths not developed. 



Male pupa, second stage (PL LXIV, fig. 11), similar 

 in colour to that of the first stage. Wing-sheaths 

 developed, and, like those of the legs, pale and trans- 

 lucent. 



Larva (PL LXVI, fig. 1) elongate-ovate, slightly 

 narrower in front than behind. Legs and antennaB 

 well developed. Mentum long, biarticulate ; loop of 

 rostral filaments reaching nearly to the anal orifice. 

 Antennse (PL LXVI, fig. 2) of six joints, the last 

 equal in length to the third, fourth, and fifth together ; 

 formula 6, 1, 3 (2, 4, 5). Anal lobes (PL LXVI, fig. 

 3) somewhat prominent; otherwise they resemble those 

 of the adult female. Anal orifice recessed, large ; the 

 hairs extending to the middle of the long central setae 

 of the lobes. 



Habitat. A destructive greenhouse pest, infesting 

 numerous plants (see Vol. I, p. 2), and found almost 

 everywhere throughout the British Isles. It has 

 occurred out of doors on the ivy-clad Avails of hot- 

 houses at Kew and a few other places, but I have not 

 known it to survive long or thrive in such situations. 



Distribution. Occurs almost everywhere on various 

 cultivated and other plants, and is a great pest in the 

 orange-growing districts of Southern Europe and else- 

 where. 



Habits. In this country it breeds very rapidly in 

 summer, and even in winter the females may be found 

 in all stages. I have never met with the males, how- 

 ever, except in the hottest weather, when I have found 

 them almost invariably sitting at rest with the wings 

 folded over their backs, as male coccids usually carry 

 them. This species is frequently attended by ants, 

 presumably for the purpose of obtaining the honey- 



