Jan. 15,1925 
Scale Insects of the Subfamily Ortheziinae 
141 
fairly distinctly segregated into the 
usual marginal and dorsal plates, the 
anterior marginal tufts relatively short 
and stout, increasing in length and 
becoming more slender and fingerlike 
posteriorly, anterior dorsal paired tufts, 
at most, only indistinctly divided along 
the median line, the remaining dorsal 
pairs distinctly separated by a triangu¬ 
lar groove, dorsal tufts transverse, each 
somewhat pointed nearer the middle 
than the margin, and the outer third of 
3.25 millimeters, width 2. 5 millimeters; 
measurements of segments of one an¬ 
tenna variable, in microns as follows: 
1,172; II, 150; III, 185; IV, 160; V, 136; 
VI, 111; VII, 114; VIII, 196; eyestalk 
rather elongate conical, nearly always 
bearing a very distinct lateral tubercle 
on the anterior margin, rarely with 2 
such tubercles; tarsal claw usually with 
2, more rarely with 3, not very distinct 
denticles on the inner face; collar of 
spines surrounding opening of each 
Fig. 34 —Orthezia urticae: Adult female, body, dorsal and ventral; X about 31 
each tuft very often separated from 
the remainder by a light diagonal 
impressed line, this producing the ap¬ 
pearance of an additional separate tuft 
of secretion between the corresponding 
median and marginal tufts, this ap¬ 
pearance, however, not correlated with 
any corresponding segregation of the 
spines in the dorsal spine bands of 
the body; ovisac strongly ribbed 
dorsally; body closely resembling 0. 
solidaginis in morphological characters, 
differing noticeably only in the follow¬ 
ing details: Length of body as mounted 
thoracic spiracle even more developed 
and more conspicuous than in solid - 
aginiSy the chitinous rim supporting the 
spines completely encircling the open¬ 
ing of the spiracle; ovisac band resem¬ 
bling that of solidaginis closely, except 
that in the section between and imme¬ 
diately behind the posterior legs the 
disk pores that are distributed through 
the posterior third of the band in solida¬ 
ginis occur along the posterior margin 
in urticae, although distributed through 
the lateral section of the ovisac band 
much as in solidaginis. 
