Coccida? from Australia. 449 



the margin deeply indented at the junctions of the suppressed 

 segments, these indentations made more conspicuous by a 

 thick chitinous rim. Median lobes minute and incon- 

 spicuous. First lateral lobes undivided, large and broad but 

 not very prominent, the free margin evenly curved, the sides 

 straight. Other lobes obsolete. Margin on each side 

 strongly chitinous and serrated. There are no squames and 

 only two small spines are noticeable on each side imme- 

 diately laterad of the large second lobes. No circumgenital 

 glands. Anal at about same level as genital aperture, near 

 centre of pygidium. Dorsal pores few, but strongly marked 

 by thickened chitinous rims. 



Total length of insect averaging 1*50 millim. 



Hah. On an unidentified plant collected at Werribee 

 Gorge, Bacchus Marsh, Victoria, Australia. (Lidgett Coll. 

 no. 47.) 



A very distinct species, easily recognizable by the minute 

 median lobes followed by the large simple lateral lobes, and 

 by the absence of circumgenital glands. The only other 

 Australian species of Mytilaspis with this character are 

 M. convewa. Mask., and M. drymidis. Mask. In convexa the 

 puparium is greyish white and the second pellicle is so much 

 raised that its posterior edge forms a conspicuous ridge over 

 the secreted portion. The pygidium is also said to have 

 broad median lobes, though (from an examination of the 

 figure) it seems possible that these may really represent the 

 lateral lobes as in indentata. M. drymidis is easily distin- 

 guished by the remarkable fringed tubular processes on the 

 margin. 



Ctenochiton (?) araucarice, sp. n. (PI. XI. figs. 2, 2 a.) 



Adult female oblong-oval; strongly convex above ; naked, 

 or with a very imperfect coating of irregular waxy plates 

 which appear to be brittle and easily detachable. Colour of 

 dried examples dark chestnut-brown ; the dorsal surface 

 strongly rugose, usually with a well-defined median longi- 

 tudinal ridge. Antenna (fig. 2) with eight joints, third 

 longest, 6, 7, and 8 very short, subequal. The terminal 

 joint bears several stout spines. Antennal formula — 

 3, 4, (2, 5), 1, (6, 7, 8). Legs stout; tarsus equal to about 

 two thirds length of tibia. Foot with four digitules, the 

 ungual broadly spatulate, the tarsals stoutish knobbed hairs. 

 Anal scales usually widely divergent ; base shorter than 

 outer edge, which is rounded and bears a few truncate spines. 

 Anal ring with six stout hairs ; the invagiuated tube which 

 surrounds them strongly rugose. Margin closely set with 



