384 Mr. A. Hempel on some 
joint 3 being longest. Honey-tubes represented by small 
orifices arising from aslight tubercle. No caudal tail present. 
Two large spines or horns project forward on the ventral 
surface between the antenne. Larve and adults secreting a 
white wax, which may entirely cover them or may be in the 
form of a marginal fringe. Winged forms with antenne of 
five joints, of which joint 3 is the longest. Wings folded 
horizontally on the back. Fore wing has the cubitus with 
one branch; the two oblique veins are united for a short 
distance at the base. Hind wings with two oblique veins. 
All forms viviparous. 
Type Ceratovacuna lanigera, Zehntner. Java. 
Ceratovacuna, brasiliensis, sp. n. 
Adult wingless female.—Ovate, convex, very dark brown ; 
dorsum covered with a very thin colourless layer of wax; 
with a conspicuous narrow transverse band of white wax 
separating the thorax fromthe abdomen. ‘The lateral margin 
is furnished with a conspicuous fringe of white wax, giving 
the insect the appearance of an Aleurodid. Dorsal derm 
hard, with a transverse groove between thorax and abdomen, 
and a number of small hairs scattered over it. It does not 
soften after prolonged boiling in a solution of KOH. The 
lateral margin is ornamented by fine regular crenulations, due 
to the wax-glands it bears. Hyes small, black, divided into 
three divisions. On the anterior margin of the abdominal 
surface there are two stout horns or spines, varying from 
68-80 microns in length. The ventral surface also bears two 
stout lance-shaped spines and four stout hairs near the base 
of the antennee. 
Antenne close together, of four joints, of which the third 
is the longest. Total length *252 to °290 millim. Length of 
joints in microns: (1) 47-54, (2) 48-47, (3) 112-122, (4) 43- 
72. All the joints bear hairs. Legs ordinary; tarsus with 
two long slender digitules with ends slightly expanded, and 
with two to four slender hair-like digitules. Claw much 
curved, with a slight notch at the base. Cornicles small 
perforated tubercles, situated close to the lateral margin of 
the body. Cauda not developed. Rostrum short, extending 
about halfway to the second pair of legs. ‘Total length 1°30 
to 1°46 millim.; width 1:09 to 1:22 millim. 
The larve are like the adult, but lighter in colour. 
Larva of the winged female.——Light brown, ovate, slightly 
narrower than the preceding form, but of the same length. 
No waxy secretion present. The two spines on the anterior 
