XV, 2 
Crawford: Jumping Plant Lice 
193 
spurs directed forward, not found in other genera of the family 
so far as known to me ; and the peculiarly long and slender fore- 
wings. So many of the species are known to be gall makers or 
leaf curlers that it probably is a safe surmise that most or per- 
haps all of the species have similar habits. 
One species of southwestern United States, Trioza diospyri 
Ashm., #s beyond doubt a representative of this genus and 
should be referred to it. It has stood heretofore as a species 
strikingly different from other American Triozse, but never- 
theless remaining in that genus. It is quite possible that 
certain other species of Trioza in other parts of the world must 
be referred to this genus, also. 
Key to the species. 
a 1 . Forewing with media forking well beyond its midpoint; first marginal 
cell usually a little larger than second. 
b 1 . Genal cones rather slender, fully as long as vertex; head scarcely 
declivous ; thorax narrow ; hind wings about two-thirds as long as 
forewings. 
c 1 . Forewings glass clear; antennas about two and one-half times as 
long as width of head. (Philippines and Borneo.) 
M. armata Crawford (’15: 264). 
e 2 . Forewings ocherous, transparent; antennae twice as long as width 
of head. (Malay Peninsula.) M. armata ochreata var. nov. 
b 2 . Genal cones broad and shorter than vertex or wanting; head usually 
strongly declivous, thorax broad; hind wings about half as long 
as forewings or sometimes more. 
ek Genal cones nearly as long as vertex, broad at base, subacute; 
head considerably narrower than thorax; female genital segment 
acutely pointed. (Philippines.) M. robusta sp. nov. 
c 2 . Genal cones about half as long as vertex, bluntly rounded ; head 
nearly as broad as thorax; female genital segment short. 
dt. Length of insect to tip of folded wings about 5 millimeters or 
less; marginal cells of forewing subequal. 
e 1 . Dorsum dark brown to black, usually with reddish or orange 
longitudinal markings; vertex broadly concave between post- 
ocelli; antennae less than twice as long as width of head; 
insect about 5 millimeters long. (Philippines, Borneo, and 
Bengal.) M. eugenioides Crawford (’17: 171). 
e\ Dorsum uniformly yellowish to light brown; vertex scarcely 
concave between postocelli; insect about 4 millimeters long. 
(Fiji; Philippines?) M. vanuae (Kirkaldy) (’07: 104). 
<p. Length of insect about 6 to 7 millimeters; first marginal cell 
of forewing larger than second. 
e 1 . Cubitus forked at or near its midpoint; antennas not quite 
twice as long as width of head ; female genital segment 
large; general color brown to light brown. (Hawaii.) 
M. palmicola Crawford (’18: 452). 
