1017.] 



203 



varietal form of L. lieapericlum ; but, if so, its very characteristic 

 colour-pattern (green or olivaceous, with strongly marked purplish or 

 Ijlack longitudinal stripe and two transverse bands) make it desei'ving 

 of a distinct name. 



Lecanhim zeTjrinum, n. sp 



Adult female circular or very broadly oval ; sometimes transversely 

 ovate; very strongly convex, often approximately hemispherical; usually 

 slopiuo; more gradually on the hinder half of the body ; margins of annl 

 cleft upturned. Smooth, or with shallow transverse sulcae ; marginal area 



Fig-. 1. — ft, Lecanium zebrinum, dorsal view, X 4. 



b, „ „ denuded of secretion, X 4, 



c, Lecanium transvittatum, side view, X 4. 



coarsely punctate. Fresh, living examples have the dorsum almost com- 

 pletely but thinly covered with a greyish-white secretion, leaving exposed a 

 narrow median longitudinal stripe and a curved series of irregular bare patches 

 on each side (see fig. 1, a). The secretionary covering is of a web-like nature 

 intermixed with powdery matter, giving the insect the appearance of being 

 mildewed. The actual colour of the dorsum (which may be revealed by 

 brushing off the secretion or dissolving it in ether) varies from ochreous, 

 with a narrow medio-longitndinal and broader transverse bands of deep black 

 (see fig. 2, e,/), to deep brown, through intermediate shades of castaueous, 

 according to the age of the insect. In the older and darker examples the 

 black markings are correspondingly obscured. 



Length of living insect 4"7o-7, breadth 4-6 mm. 



