110 
4. Aleurodes aceris, n. s. 
Order Hemiptera. Family Aleurodidje. 
(Plate XI, Figs. 4 and 5.) 
I have noticed, for several years, a peculiar bark louse upon 
leaves of the maple, but have not bred it until the present ye 
The fully developed pupal scale is oval in general outline, sornew 1 
lyrate, broadest posteriorly, contracted in front of the midc 
Margins entire, surface densely granulated. The color is cho 
late mottled with white, the white varying in amount and tend 
to form three transverse bands. The central segmented area 
usually irregularly mottled with white, and a quadrate patch, 
eluding the vent, 'is almost always brown; but, otherwise, the cc 
may vary from nearly uniform brown to almost white. Out' 
sometimes slightly emarginate posteriorly. Lengthy .095 of an im 
greatest width, .045; width at anterior fourth, .CL6. 
The imago is pale yellow throughout; legs and abdomen pal 
wings milky white; rostrum black at the extreme tip; veins yell 
ish; first joint of the antennae scarcely longer than wide, the 
maming joints filiform, the second nearly as long as the four 
lowing and about four times as long as the first, the fourth Ion 
than the third, the third and fifth about equal, the sixth fusifo 
At Tamaroa, in Southern Illinois, soft maple trees were fo 
badly infested by this bark louse, but elsewhere it has occurred 
only trivial numbers. There are apparently two broods of this spe< 
in a year, scales collected in August, 1883, emerging April 1( 
•24, 1884, and others, collected during the present summer, em< 
ing August 4. From these larvae several hymenopterous paras 
belonging to the genus Elaptus escaped September 6, the specie: 
which is apparently new. 
Elaptus aleurodis, n. s. Plate XI. Fig. 6. Female. Length .03 o 
that of inch ; the head .005 inch ; front wings .032 of an inch long 
.001 inch wide; posterior wings .0032 inch wide at the widest point; 
tennae as long as the head and whole body; scape stout, arcuate, ri 
to the top of the head, about as long as the three following joi 
nearly smooth, as is also the second joint; remaining joints den 
pilose; the club not jointed, as long as the three joints preced 
first joint obconic, second about the same length but narro 
Color black, surface shining, abdomen alutaceous, head and th< 
punctured, antennse yellow, legs entirely yellow,. femora and t 
of the middle and posterior legs black, their tarsi yellow. 
Described from three specimens bred from Aleurodes aceris. 
5. Lygus invitus, Say. > 
Order Hemiptera. Family Capsids. 
* 
(Plate XII. Fig. 1.) 
Brief mention may properly here be made of a species whos* 
juries to vegetation have not hitherto been serious, as far as kn< 
