arTt.17. MONOPHLEBINAE AND MARGARODINAE—MORRISON. ai 
pores, the inner submedian, the outer marginal, at least in the ab- 
dominal region; ventrally with a single submarginal row of circular 
bilocular pores with large and elongate centers, and finally with an 
interrupted circle of round pores with six loculi around the anal open- 
ing; derm setae all slender, all with basal collars, with three pairs of 
long, primary setae at the posterior apex of abdomen, these longer 
than the body, lateral abdominal setae much shorter, but still long 
and slender, with some long setae and some shorter and somewhat 
stouter ones in six longitudinal rows dorsally, the outer two marginal, 
this arrangement confused anteriorly; with rows of similar but much 
smaller setae ventrally; anal tube normal, with a double collar inter- 
nally, and a discontinuous circle of disk pores at mouth; possibly 
with a single protruding ventral circatrix, this not certain. 
Genus ICERYA Signoret. 
ICERYA KOEBELEI Maskell. 
Plate 2, fig. 1. 
Reference.—Fernald Cat. Cocc. World, 1903, p. 24. 
This species is at present represented in the Maskell collection by 
the following slides: One of ‘‘adult female, 1892,’ one of ‘‘ 2nd stage 
female, 1892,” one of ‘larvae, 1892,” one of larvae 1892” (3), and one 
of ‘ wing, abdomen and antenna of male 1892°’’ There is also a slide 
without name, but bearing the label “‘ Icerya 283, from Koebele, Jan. 
92, larva,’’ which appears to be this species, as this number was 
assigned by Maskell to his unmounted specimens of the species, 
consisting of two unmounted adult females. 
Maskell’s description of this species appears to be unusually accu- 
rate, and the writers have therefore confined the redescriptive notes 
almost wholly to certain anatomical ‘features of the insect which 
were not described by him. 
Adult female.—As described, except that long, glassy threads may 
be noted projecting out of the body secretion, Maskell’s statement 
“but observations of several specimens did not show any tubular 
spinnerets or glassy tubes,’ implying that these are wanting; length 
2.5mm., derm clearing completely on treating with potassium hydrox- 
ide, bearing numerous, long, conspicuously blackish, hair-like setae, 
these not plainly segregated in tufts as in purchasi; antennae of the 
usual form for the genus, 10-segmented; legs normal; with two pairs 
of thoracic and, so far as can be determined, two pairs of abdomi- 
nal spiracles, these located at the posterior apex of the body and 
with the hinder pair larger; derm pores, as in purchasi, of two 
sorts the smaller circular to oval, with oval centers and six to eight 
loculi, these scattered abundantly over the body, the larger circular, 
short tubular, with an open circular center with a little point on one 
