422 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
It reaemblec Lj/gut invtttu Say, and presents .several of the color varieties common 
to that ipeciee, bat it la a mnefa larger insect, of a longer figure, and has a more rlat- 
tsoed upper surface. 
I hes. 
Order Hkmiptbra; family Alkiimdihi.. 
The following account of this interesting insect is copied from Pro- 
fessor Forbes (Third lieport Insects of Illinois): 
I'iijxi.—l have noticed, tor several years, a peculiar bark louse upon the lea 
the maple, but have not bred it uutil the present year. The fully developed pupal 
scale is oval in general outline, somewhat lyrate, bioadest posteriorly, contracted in 
front of the middle. Margins entire, surface densely granulated. The color is choc- 
olate, mottled with white, the white varying in amount and tending to form three 
transverse bands. The central segmented area is usually irregularly mottled with 
white, and a quadrate patch, including the vent, is almost always brown ; but other- 
wise the color may vary from nearly uniform brown to almost white. Outline some- 
times slightly emargiuate posteriorly. Length, .095 of an inch; greatest width, 
.045; width at anterior fourth, .036. 
Imago. — Pale yellow throughout; legs and abdomen paler; wings milky white; 
rostrum black at the extreme tip; veins yellowish; first joint of the antenna? 
scarcely longer than wide, the remaining joints filiform, the second nearly as long as 
the four following aud about four times as long as the first, the fourth longer than 
the third, the third aud fifth about equal, the sixth fusiform. 
At Tamaroa, in southern Illinois, soft maple trees were found badly infested by 
this bark louse, but elsewhere it has occurred in only trivial numbers. There are 
apparently two broods of this species in a year, scales collected in August, 1883, 
emerging April 10 to 24, 1834, and others, collected during the present summer, 
emerging August 4. From these larva? several hymenopterous parasites belonging 
to the genus Elaplus escaped September 6, the species of which is apparently new.* 
64. Phytoptus quadripes Shinier. 
Class Arachxida ; order Acarina. 
Mr. H. Garman gives the following account of this mite, which is 
taken from his article in Forbes' First Report on the Injurious Insects 
of Illinois: 
This mite produces galls ou the leaves of the soft maple, Acer dasyearpum Ehrh. 
This is the Phytoptus upon which Dr. Henry Shinier founded his genus Vasates. 
It is a coarsely striate species, the stria* numbering from 37 to 42*. The length is 
about .008 inch. The tarsal claw is slightly curved and ends in an evident knob. 
The feather-like appendage has four pairs of prongs. The color varies from pale yel 
lowish to light orange. Sexually mature females, the young, and eggs occur in the 
galls in June. 
*Elaptu8 aleurodis Forbes.— Female : Length, .03 inch ; that of the head, .005 inch ; 
front wings, .03*2 inch long and .001 inch wide: posterior wings, .003*2 inch wide at 
the widest point : antenna' as long as the head and whole body : scape stout, arcuate, 
rising to the top of the head, about as long as the three following joints, nearly 
smooth, as is also the second joint : remaining joints densely pilose: the club not 
jointed, as long as the three joints preceding; tirst joint obconic, second about the 
same length, but narrower. Color black, surface shining, abdomen alutaceous. head 
and thorax punctured, antenna' yellow, legs entirely yellow, femora aud tibiae of the 
middle and posterior legs black, their tarsi yellow. Described from three specimens 
bred from Aleurodes aceris. (Forbes.) 
