LECANIUM PERSICJE. 91 



(fig. 4) with a fine, delicate tesselation, generally 

 faintly indicated, and often quite obliterated by macera- 

 tion in potash; derm-glands of two kinds, one very small, 

 resembling minute circular perforations, the other very 

 large, more or less circular or ovate, and less trans- 

 parent ; these latter are generally surrounded by 

 irregular thickenings of the dermis, and are also inter- 

 sected by irregular lines or grooves, which together 

 represent the position of the rugosities of the exterior. 

 There is also a group of somewhat larger glands or 

 pores (fig. 4 a) extending along the dorsum from the in- 

 sertion of the anal lobes; these are very transparent, and 

 usually have a central nucleus or pore. All the derm- 

 cells are much more numerous at the margins (fig. 5). 

 Marginal spines (fig. 5) very small, simple, and usually 

 wanting in prepared specimens. Ventral dermis with 

 a few short scattered spines (fig. 8) and several long 

 hairs in the region of the abdominal lobes (fig. 4 a). 

 Spiracles (fig. 6) long and slender, and accompanied by 

 a number of circular spinnerets. 



Long, 3 "50-6*25 mm. ; wide, 2-4 mm. ; high, 

 1-75-3 mm. 



Larva dusky greenish-yellow, or of a pale reddish 

 colour when fully grown, emitting very long and ex- 

 ceedingly delicate glass-like filaments from both extremi- 

 ties, which appear beautifully iridescent under strong 

 reflected light. When first hatched the larvae are 

 yellowish or pale red. 



Ova white. 



Male. I have never met with examples of either the 

 puparium or the perfect insect. Signoret,* quoting 

 Bouche, describes the male thus : "Le male est d'uii 

 brim rouge f once avec la tete noire ; les antennes et les 

 pattes sont jaunatres ; les ailes, blanchatres, sont 

 bordees anterieurement d'une nuance rose rouge jusqu'a 

 la premiere nervure. Les poils qui sont sur le dernier 

 article des antennes sont simples. 



" Sa longueur est d'une demi-ligne. 



* ' Essai,' p. 239. 



