XV, 2 
Crawford: Jumping Plant Lice 
141 
b 1 . Hind legs not larger than middle pair, apparently not saltatory, 
hind coxas small, and coxal spur nearly wanting.... Apsylla Crawford. 
b 2 . Hind legs longer than middle pair, apparently saltatory; metacoxse 
much larger than mesocoxae, and metacoxal spur well developed. 
e\ Forewings membranous, more or less transparent. 
cF. Media, cubitus, and radius not forking at same point from basal 
vein; hind wings not nearly wanting. 
e 1 . Antennae short, seldom longer than head and thorax combined; 
head usually much deflexed and retracted into large pro- 
thorax. 
f 1 . First marginal cell of forewing narrow and long, parallel- 
ing posterior margin; media-cubital stem as long or nearly 
as long as radial stem; metacoxal spur usually long, four 
to eight times as long as thick; antennae usually longer 
than width of head; genae sometimes swollen conspicuously 
beneath antennal bases Paurocephala Crawford. 
P. First marginal cell not narrow and long; media-cubital stem 
usually shorter than radial stem or wanting. Metacoxal 
spur usually very short, one to three times as long as 
thick; antennae typically very short, seldom longer than 
width of head; genae seldom swollen. 
Pauropsylla Riibsaamen. 
e 2 . Antennae longer than head and thorax combined; head less 
deflexed and retracted into prothorax. 
f. Antennae not longer than body to tip of abdomen; meta- 
scutum with two prominent hornlike epiphyses projecting 
upward Diceraopsylla Crawford. 
f. Antennae very long and slender, longer than body to tip 
of abdomen; metascutum without horns; genae swollen, 
often spherical beneath antennal bases. 
Heteropsylla Crawford. 
( F . Media, cubitus, and radius of foreudng forking from basal vein 
at same point (as in Triozinas) ; cubital vein unforked at apex; 
hind wings nearly wanting Leptynoptera g. nov. 
c\ Forewings nearly or quite opaque, more or less coriaceous; veins 
greatly contorted; front tibiae foliaceous Heteroneura g. nov. 
a 2 . Genae swollen beneath into two more or less conical processes, these 
usually quite separated at base. 
6\ First marginal cell of forewing long and narrow with Cm more or 
less parallel with margin of wing Paurocephala Crawford. 
b 2 . First marginal cell of forewing not long and narrow, Cm not parallel 
with margin. 
c’. Body large; radial sector and media connected by a cross vein; 
first marginal cell small, much smaller than second. 
Phacopteron Buckton. 
&. Body small; cross vein wanting; first marginal cell very large, 
much larger than second ; genal cones in some species scarcely 
discernible Calophya Loew. 
166470 2 
