Jan. 15, 1925 
Scale Insects of the Subfamily Ortheziinae 
127 
pletely covered dorsally and ventrally 
with strongly developed plates of waxy 
secretion, buff-colored in the specimens 
examined, these arranged in the usual 
lateral and dorsal plates, the anterior 
shorter and smaller than those in the 
remainder; ventral ovisac band broad, 
made up of closely crowded spines, with 
bands of disk pores 3 or 4 deep ex¬ 
tending through the exterior fourth or 
fifth of the band, but without any 
distinct pores along the inner margin, 
in this respect differing from most of 
the species in the genus, the concentra¬ 
tion of disk pores usually occurring in 
or along the inner rather than the outer 
margin; ovisac band enclosing, besides 
the pores already mentioned, 5 more 
or less distinct transverse rows of small 
truncate conical tubercles, these oc¬ 
cupying the position of and apparently 
corresponding to the rows of ventral 
abdominal spines found in nearly all 
the other species in the genus; anal 
ring stout oval, the pore band on each 
half broad, slightly joined at the ends, 
and distinctly and prominently angu- 
late within anteriorly and posteriorly; 
with the usual 6 anal ring setae. 
This species has been described from 
three mounted and a few unmounted 
adult females from Mexico (no definite Fig. 22 —Orthezia minor: Adult female, body, dorsal 
locality) on roots of Parthenium ar- and ventral; X about 31 
gentatum (Compositae), collected by median plate directed forward, long 
F. E. Lloyd, received February 5, 1909. and deeply notched apically, the 
The types are in the United States anterior lateral marginal plates very 
National Collection of Coccidae. irregular, the posterior lateral plates 
increasing in length to the apical 
one or two, these quite long, 
anterior dorsal plates fused into 
a single transverse plate directed 
forward; the second pair sepa¬ 
rated, but also directed forward; 
remaining plates very strongly 
and conspicuously developed, 
directed diagonally backward 
and outward, overlapping for 
much of their length; ovisac short 
(possibly incompletely devel¬ 
oped), only about 1 millimeter 
long; length of body, asmounted, 
1.25 millimeters; width, 0.9 
millimeter, ovoid, posterior 
apex broadly rounded, taper¬ 
ing anteriorly; derm membran¬ 
ous; antennae normally 8-seg- 
mented, rather elongate, meas¬ 
urements of one in microns 
as follows: I, 107; II, 100; 
III, 114; IV, 71; V, 78; VI, 
75; VII, 76; VIII, 210; eyestalk 
rather elongate tubular; beak 
conical, 1-segmented, with a 
fairly distinct suggestion of a 
division near base; legs 
21.— Orthezia mexicana: Adult female, body, dorsal and characteristic for the genus, 
ventral; x about 31 relatively long as compared 
to the size of the body, rather 
„ XT „ „ „ T , . Tn n t*" slender, tarsal claw usually with 2 
igs. , - , 6 , , 4, , and 22 , . , fairly distinct denticles on the inner 
Adult female. —Small, length of face; thoracic spiracles not unusual, 
body with secretion about 2 milli- each opening into the usual spine 
meters, width about 1 millimeter, com- cluster, with a few spines directly 
Fig. 
ORTHEZIA MINOR, NEW SPECIES 
