138 
Journal of Agricultural Research 
Vol. XXX, No. 2 
ORTHEZIA TILLANDSIAE, NEW SPECIES 
Figs. 4, A; 6, J; 7, N; and 32; PI. 2, F 
Adult female. —Size small, average 
length of body with secretion 1.5 milli¬ 
meters, average width of body with 
secretion nearly as much; ovisac when 
fully developed very elongate, total 
maximum length of ovisac and body 
observed 9 millimeters, average length 
approximately 6 millimeters, ovisac 
widest at base, tapering slightly poster¬ 
iorly, more or less curved in a hori¬ 
zontal plane when fully developed, 
about as wide as the body of the insect 
and distinctly narrower than the body 
on each side, by a similar line isolating 
the median tufts of secretion from the 
marginal tufts; each margin of body 
with fingerlike tufts of secretion, the 
anterior curving forward, placed oppo¬ 
site the base of the anterior median 
tuft, the remainder curving backward 
with gradually increasing emphasis, 
until the posterior 2 are reached, these 
longer and more slender than the 
others; ovisac definitely, but not 
prominently, ribbed or fluted dorsally 
and laterally, only finely striated 
ventrally; body ventrally nearly as 
completely covered with secretion as 
the dorsal surface but the secretion 
Fig 32 .—Orthezia tillandsiae, adult female; A, body, dorsal and ventral, X about 60; B, thoracic 
spiracle, X 335; C, mouth parts, X 
with its secretion; body of female 
covered with firm waxy secretion di¬ 
vided into plates, with 2 very long 
anterior plates projecting well out 
beyond the head, 2 much smaller, 
transverse, just behind these, 3 pairs 
of semierect, posteriorly directed plates 
scovering the disk of the thoracic region, 
and, in direct continuation of these, 6 
similar plates gradually reduced in 
size posteriorly and usually so fused 
together that the actual number present 
is not determinable, these 2 rows of 
plates distinctly separated from each 
other by an impressed median line 
penetrating to the derm, and laterally, 
120; D and E, body setae; X 1,500 
here much thinner and less prominent; 
average length of body as mounted on 
slide 1.3 millimeters, average width 0.9 
millimeter; derm membranous except 
for 3 pairs of, usually, quite distinct, 
transverse, irregular to oval, somewhat 
chitinized areas placed dorsally on 
each side of the outer ends of, and 
between, the second to fifth transverse 
rows of spines anterior to the anal 
ring; antennae normally 8-segmented, 
the lengths of these for one antenna 
in microns as follows: I, 107; II, 89; 
III, 114; IV, 64; V, 93; VI, 75; VII, 
79; VIII, 160; spine, 18; eyestalk nearly 
as long as wide, only slightly conical, 
