1921]. Hoke: Structure of the Oraceratube 341 
width from distal end of lobes; vulva between postgenacerores; incisuree 
slight, second almost as wide as median. 
_ Host.—Maple (Acer), leaves; Vicksburg, Mississippi, April 
1920, (Luther Brown); black haw (Bumelia lanuginosa), leaves, 
Cat Island, off gulfcoast, Mississippi, September 8, 1920, 
(RP barahart). 
The scales are usually found along the sides of the veins or 
in the depressions at the forks of the veins, especially near the 
-petiole of the leaf. 
The striking differences between this scale and Scobinaspis 
serrifrons is the greater proportional length of the scale, which 
is white in contrast to the shorter reddish-brown scale of 
serrifrons; and the same difference in the length of the body 
which has only a few dentate projections on the ventral surface 
of the head and with no projections on the cephalic margin. 
Mytiella sexspina n. sp. (Figs. 10, 11, 12, 13). 
Scale of Female.—Color brown, long, length usually more than four 
times breadth, straight or curved, according to crowded conditions of 
specimens, ventral scale white, very prominent along sides of scale but 
retracted a short distance within margin, adhering to dorsal scale when 
insect is removed from plant, if many eggs have been deposited, usually 
divided, otherwise generally intact on meson, 
Scale of Male.—Simuilar to that of female, but only about one-half 
as long. 
Adult Female.—Body usually three and one-half times as long as 
broad, with a distinct constriction between mesothorax and meta- 
thorax and between metathorax and abdomen; five distinct preabdom- 
inal segments; mesothorax, metathorax and first abdominal segment 
more heavily chitinized than remaining segments; coria of thorax and 
preabdomen distinct and not heavily chitinized; brevaceratubee numer- 
ous, on lateral margins extend mesad on ventral aspect along unacoria; 
mesothoracic spiracerores 2-4, metaspiracerores wanting; cephalic end 
of each lateral margin of each of last three preabdominal segments with 
a small heavily chitinized thorn or tooth-like projection; fifth preab- 
dominal segment with two bractez, occasionally three, fourth with 
two, and third with three or four short, stout ones, these latter may 
be wanting. 
Pygidium.—Lobes in two pairs, second pair deeply incised, median 
pair of lobes rounded at distal end, mesal margin with two slight notches, 
lateral margin apparently always with a single notch, second pair of 
lobes with mesal lobelet about twice as wide as lateral lobelet and 
longer with slight notch on each side, lateral lobelet entire, rounded at 
distal end; plates arranged 2—2—2-2-2, plates of median incisure with 
short dentate projections on each side, usually located near middle of 
their length, plates of second incisurze with similar short dentate pro- 
