310 
5. With cireular wax pores numerous and closely crowded in derm of 
caudal segments, numerous dorsal setae, few pairs of cerarii and 
these on the distal segment or segments of abdomen, body usually 
Cana Sean betas So em boteo etn Aono oocldmumots Dom ot ae Trionymus 
With circular wax pores.less numerous and closely crowded in derm 
of caudal segments, fewer dorsal setae, many pairs of cerarii, 
usually seventeen to nineteen, distributed on the abdominal, thor- 
acic, and cephalic segments, body usually of oval form. 
Pseudococcus 
6. Antennae eight-segmented, body with marginal tumescences. 
Tylococcus 
Antennae six-segmented, body without marginal tumescences Ripexsia 
GENUS ANTONINA SIGNORET. 
Pseudococcine forms without legs in the adult female; with 
the antennae in the adult female reduced to mere stubs; without 
recognizable cerarii; with the posterior end of the body more or 
less invaginated, this invagination forming a tube at the inner 
end of which is the anal ring. Spiracles very large and con- 
spicuous. Circular, multilocular pores present on the dorsum. 
Type of the genus Antonina purpurea Sign. 
Three species of this genus are commonly found in Hawaii, 
two on bamboos grown for ornamental purposes, and one on the 
common lawn and pasture grass Cynodon dactylon. They are 
of no great significance economically. 
The species may be distinguished by use of the following key: 
1. Entire derm heavily chitinized; large; 8 mm. long.......... bambusae 
Less heavily chitinized, the derm thick only on posterior abdominal 
sSeomentss? «smaller +2J.4. 5%). ance ei eae een sue ote ora ease oI tee ee 2 
2. Abdominal spines fairly stout; body oval (on bamboo)......... crawt 
Abdominal spines very slender; body rotund (on Bermuda grass) . .indica 
Morrison (Pr. U. S. N. M., 60, p. 56) describes and figures 
bambusae, and it is on the basis of his comparisons (p. 58) that 
the species is included in Antonina. Green gives excellent fig- 
ures of indica and bambusae and describes the latter in consider- 
able detail in Part V of the Coccidae of Ceylon. 
GENUS GEOCOCCUS GREEN. 
Pseudococcine form with the antennae set very close together 
at the front of the head; six-segmented, the terminal segment 
