226 ON A NEW SPECIES OF COCCID ON FERN-ROOTS. 



root ; margin elliptical, slightly flattened. Abdomen exhibiting 

 a shallow cleft with the usual two dorsal lobes ; but the cleft 

 is scarcely noticeable, being hidden by the dorsal convexity. 

 Cephalic region comparatively smooth ; abdominal re.cjion con- 

 spicuously segmented. The body at gestation becomes full of 

 eggs and partially developed larvae. Antennae short, rather 

 thick, conical, with six short subequal joints, of which the last 

 bears a few hairs. Feet also short, partly atrophied, the joints 

 somewhat swollen ; claw very small. Rostrum moderate ; men- 

 tum monomerous. 



Early stages and male not observed. 



Hah. — Kurrajong Heights, New South Wales ; under ground, 

 on rhizome and roots of Doodia aspera. 



The six-jointed antennae may be considered as a sufficient 

 character for the separation oi Lecanopsis from Lecanium ; the 

 subterranean habitat would not by itself suffice. 



EXPLANATION OF PLATE. 



Lecanoims filicum. 



Fig. 1. — Root of Doodia, with insects. 

 Fig, 2. — The same, enlarged. 

 Fig. 3. — Antenna of female. 

 Fig. 4. — Foot of female. 



