25 
end of Lingula arises a pair of upward-curving setae. A narrow furrow 
extends caudad from orifice to margin of case. 
Adult 9- — Length, about 0.84 mm. ; fore-wing, L.07 by 0.49 mm.; 
hind tibia. 0.37 mm.; hind tarsus, 0.28 mm.; color of body, uniformly 
yellow, except the frons, which is deep brownish black, and the caudal 
margin of head, and certain thoracic scleritos; antenna 1 and legs paler; 
eves dee}) red, constricted in the middle. Wings marked with two 
irregular bands of reddish brown. The proximal band crosses the 
wing near the middle of its Length. Caudad of vein it has an irrregular 
V -shape j the apex of the V distad. Cephalad of vein tin 1 marking 
is of an irregular rhomboid shape. The distal band is somewhat nar- 
row and interrupted as it crosses the vein. It crosses wing at about 
its widest part. A short distance distad of the caudal flexure of vein 
begins a narrow strip of this reddish-brown color, which extends along 
vein to its distal end, where it terminates in an enlarged spot. At 
base of wing, just caudad of veinlet, is also a small spot. 
Antennae 7-jointed; joint 1, short subpyriform; joint 2, also sub- 
pyriform, but much larger; joint 3. long cylindrical, four-fifths length 
of distal four together; joint 4. short, about one-half length of fifth; 
joint 6, somewhat shorter than T. Mentum usual. Hind tarsus but 
slightly longer than anterior tarsus. Anterior and middle tarsi sub- 
equal in length. Operculum, when elevated and seen in lateral aspect, 
subcorneal, though somewhat more slanting cephalad than caudad. 
Lingula protruded, tapering, and with a sickle-like curve. 
$ . — Length, a'bout 0.07 mm.; genitalia ordinary; in other respects 
essentially as in female, but proportionately smaller. 
Collected by Dr. C. V. Riley on cotton plant in his garden. Wash- 
ington, D. C, October 4. 18?9 3 and later at Selma. Ala. Also col- 
lected on leaves of cotton plant at Columbus, Tex., in July, 1879, and 
received by the Division of Entomology. United States Department of 
Agriculture, August 27 and September 14. 1895, from S. B. Mullen. 
Harrisville. Miss., also on cotton. The leaves received from S. B. 
Mullen are quite thickly covered on the lower surface with the pupa- 
cases. Concerning what is probably this same species in Mississippi, 
on cotton. Mr. W. H. Ashmead says: 1 
"This species lives on the leaves, and toward the latter part of July and the mid- 
dle of August becomes exceedingly numerous, many hundreds occurring on a single 
plant, and when disturbed they fly up in powdery clouds. The eggs, from titty to 
a hundred or more, are laid on the underside of a leaf without any regard t>» order, 
resembling those of the orange Aleurodes, only somewhat smaller, with a short 
pedicel, paler color, and with the surfac e perfectly smooth and shiny. These hatch 
in from four to five days, and the young larv;c attach themselves to the leaf and 
begin feeding on its juices. Although occurring by thousands, I could detect but 
slight injury caused by these insects." 
'Insect Life. Vol. VII. 1( . 323. 
