45 
jointed, first thick, clavate. Eyes brown, two-parted. Tarsi long, 
exceeding two-thirds the tibiz. I find these insects during the entire 
summer on the under side of Asarwm canadense (wild ginger). In 
September I have seen them very numerous in all stages, the larva 
and pupa presenting the usual scale-like form of this family; at this 
time the under side of the leaf that has reared a good colony is 
covered with a white downy secretion. The imago when slightly dis- 
turbed flies away, acting not much like small Tineina, hence it may 
often be found on trees, etc., but I have observed the larva only on 
the above-named plant, and believe it to be entirely confined to it.” 
Mt. Carroll, Ill., August 24,1867, Shimer. Trans. Am. Ent. Soc., Vol. I, p. 281. 
See also Insect Life, 1893, p. 219. 
3. Aleurodicus cockerellii sp. (Plate VI, figures 59-62). 
Pupa-case.—Size about 1.63 by 1.23 mm.; subovate in shape, 
smaller end cephalad. Color uniformly yellowish. There is but slight 
waxy exudation from dorsum, which is more or less mealy. No wax 
rods have been observed. Dried specimens separate easily from leaf, 
leaving usually a ring of white mealy wax of the size and shape of 
case; extending from the periphery inward are light lines of this 
mealy wax, more or less distinctly marking the position of the abdomi- 
nal sutures of the case. Dorsum of pupa-case almost flat, but as seen 
under a hand lens is much wrinkled transversely in dried material. 
These folds or ridges occur mainly along the body segments, and pos- 
teriorly become much curved around the vasiform orifice. Under the 
microscope the abdominal segments are indistinct and scarcely elevated, 
except in the medio-dorsal line, where a slight rounded keel may be 
observed. Margin of case practically entire. Very slight furrows or 
thickenings extend mesad a short distance from margin of case, rather 
marking the margin into more or less distinct rectangular figures. 
Just within the margin all around is a series of very small dise like 
pores, usually one to each of these marginal rectangles. Dorsum void 
of well-developed sete, except a pair just within the caudal margin; 
but there is a pair of small sete at vasiform orifice, and very minute 
sete occur here and there on the dorsum. The five or more pairs of 
large compound pores, so usual on dorsum of pupa-case of Alewrodicus, 
seem to be absent in this species, but very many minute transparent 
pores may be detected on dorsum under high power of microscope. 
Vasiform orifice subcordate, somewhat longer than wide; cephalic 
margin straight; at caudal end there is a short, stout, spine-like pro- 
trusion. Operculum subrectangular, about half length of orifice; 
cephalic and caudal margins practically straight, lateral margins 
rounded; lateral and caudal margins thick; minutely setose. Lingula 
quite as long as orifice, very broad, and bearing distally two pairs of 
sete, the smaller pair proximad; minutely setose. 
Rudimentary legs and antenne on ventral surface quite distinct. 
