146 
rio. 24 . 
or branch veins. Antennae six-jointed. Some of the species which be¬ 
long to this group, appear to, and according to the 
authorities we have on the subject, do place their 
wings horizontally in repose. I have as yet, 
found no species with this habit, which belongs to 
this section; as heretofore stated, I have observed 
gall-inhabiting species with the wings sub-hori¬ 
zontal while in the gall, but assuming the erect 
position after coming into the open air, hence I 
conclude the normal position of these organs, in 
these species, is erect. 
wmgs of Tctramura uhm. qq ie 0 f the species of this section, have 
already been alluded to. 
Genus PEMPHIGUS. Hartig. 
The species have the third discoidal vein of the front wings simple, 
Fiq that is, without any fork or division; 
the hind wings have two branch 
veins. (See Figs. 23 and 25.) The 
an ten me, which are quite short, not 
extending bevond the end of the 
thorax, are six-jointed, the third joint 
—P— 
Pemphigus vagabunaus, winged female. 
longest. 
Pemphigus fraxinifolii n. sp. 
Winged Individuals .—Anterior wings with the third discoidal vein 
simple, arising from the second vein a short distance from the base 
of the latter, running almost directly outward toward the apex of the 
wing; second vein also very oblique and arising very close to the first 
vein; first vein somewhat dim, sub-obsolete, slightly curving outward 
as it approaches the margin of the wing; fourth vein curves very 
slightly near the base, the remainder being almost straight. Stigma 
semi-opaque, elongate-rhomboidal, sides nearly parallel, ends with about 
the same slope; length about three times the width. Sub-costal vein ; 
