23 
halves of which become spread out into a continuous broad ribbon at 
distal end. From the middle line of abdominal segments a perpen- 
dicular exudation arises which meets cephalad, a short, transverse, but 
thick column arising from last thoracic segment. At cephalic end is 
a pair of ribbons, rather narrow, and appressed together at top. The 
whole appears as an elliptical rosette or crown when viewed dorsally. 
Some specimens have what appears to be a secretion from the lateral 
pores. This is closely applied to leaf all around, and of a gelatinous 
appearance. 
Margin all around finely crenulated with a double rim, the dorsal 
rim much more distinct and the incisions acute; the ventral rim of 
wax tubes are bluntly rounded and the incisions shallow and rather 
wide. 
There is a narrow marginal rim of varying distinctness, with a 
Series, within the margin, of small disk-like tubercles, quite similar to 
those in acacia, but smaller. There is also on the dorsum, on each 
side of middle line, a row of these tubercles; on the abdominal sutures 
there is a pair to each segment of dark-brown spots. On the margin, 
at cephalic end, is a pair of minute setae, and the usual caudo-lateral 
pair; on the dorsum, at cephalic end of vasiform orifice, there is a pair 
of stout setae, and a pair about midway between orifice and caudal end 
of case. 
Dorsum slightly raised along dorsi-meson of abdominal segments 
and gradually sloping to margins. There are no submarginal furrows 
on dorsum as in acM d(B. 
Vasiform orifice broadly elliptical, about four-fifths as wide as long. 
Operculum very short and obscure. Lingula quite short, stout, almost 
rudimentary. Operculum and interior of orifice thickly covered with 
minute black dots, possibly spine-like tubercles. On ventral surface 
rudimentary feet very distinct. 
Received by the Division of Entomology, at Washington, D. C, from 
D. W. Coquillett, Los Angeles, Cal., December 5, 1887, on leaves of 
Quercus ctgrifolia, and again from Mr. Coquillett, same locality and 
same host plant. March 31, 1888; also from S. A. Pease, Pomona, Cal., 
on same host plant, September 14, 1896. Specimens of this insect 
were received also from Prof. J. H. Comstock. from Santa Rosa, 
Cal., on leaves of "live oak," October T, 1880. Div. Knt. No& 4238 
and 7l>(». 
This Aleurodid occurs in great abundance on the lower surface of 
leaves of Qtu-rcux a</r!foJ !<i , and an occasional specimen may be 
observed on the upper surface. There is considerable variation in the 
amount of the white waxy secretion, particularly in younger pup®, 
in which the dorsum may be almost bare. Described from numerous 
pupa cases. Type 4238, Los Angeles, Cal.. December 5, 1887. 
