156 Mr. T. D. A. Cockerell on 



present, but rudimentary ; antennse about DO /t lont^, slender, 

 obscurely jointed, with a very blunt bristly tip. Legs dark 

 ferruginous, not very stout, anterior leg with tibia + tarsus 

 about 100 yu, long; hind leg with femur + trochanter 90 /i ; 

 tibia -1- tarsus 120 /x. Skin orange-ferruginous, not clearing 

 upon boiling, obscurely tessellated, the tesserfe about 15 ft 

 diameter. Margin thickened, with a very few small simple 

 bristles and quite numerous very small (about 7 fi long) 

 spear-head shaped spines. Near the margin are many large 

 gland-pits. Tliere is a distinct median longitudinal groove 

 and also a large oval dorsal opening corresponding to the pit 

 seen in the waxy scale. 



Larva (after boiling) pale lemon-yellow, about 375 /i long 

 and 180 broad, tapering posteriorly, with the abdominal 

 segments very well marked. Caudal bristles short, about 

 40 [i long. Legs long (about 165 /i), digitules filiform, 

 knobbed ; anterior legs with tibia and tarsus about equal 

 (42 yx) J if anything, the tibia is the longer. Antennse short 

 (hardly 90 /i), last joint with a very long bristle. 



S • — Scales on undersides of leaves, small and narrow, 

 covered with dense waxy secretion, which form? two large 

 dorsal tufts, one curling forwards, the other backwards. 

 There are also irregular lateral nodules. Apical cap placed 

 horizontally. 



S' — Pale yellow; wings iridescent. 



Hah. Zapotian, Jalisco, Mexico, on twigs of wild guava, 

 July 6, 1902 (C. //. r. Townsend). 



To this genus I must also refer two Australian species, 

 Cardiococcus fossilis (Inglisia fossilis, Maskell, N. Z. Trans. 

 xxix. p. 308) and C.foraminifer (/. foraminifer, Maskell, 

 N. Z. Trans, xxv. p. 213). They have the dorsal pit and 

 the conical spines so characteristic of C. umbonatus, 



Ceroplastes mgxi'canus, Ckll. 



Zapotian, Mexico, July 7, on a composite near Par- 

 ihenium ; collected by Prof. Townsend. 



Adults are 5^ millim. long, 5 broad, 4 high. Immature 

 examples are 3 millim. long, 2| broad, 1^ high, dull white, 

 the plates indicated by grooves, but not at all by colour; 

 dorsal nucleus large, white, surrounded by dark purple-brown ; 

 lateral nuclei similarly coloured, but small, all very con- 

 spicuous ; sometimes a chalky line runs from the lateral nuclei 

 to the margin. Dorsum flat or sloping, not humped. 



