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., is 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 Triozx, 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\ Genal cones rather slender, fully as long as vertex; head scarcely 

 declivous; thorax narrow; hind wings about two-thirds as long as 

 forewings. 

 c\ Forewings glass clear; antennas about two and one-half times as 

 long as width of head. (Philippines and Borneo.) 



M. armata Crawford ('15: 264). 

 c~. Forewings ocherous, transparent; antenna? twice as long as width 



of head. (Malay Peninsula.) M. armata ochreata var. nov. 



6\ 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. 



c 1 . 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. 



o J . Genal cones about half as long as vertex, bluntly rounded; head 

 nearly as broad as thorax; female genital segment short. 

 cf 1 . Length of insect to tip of folded wings about 5 millimeters or 

 less; marginal cells of forewing subequal. 

 e\ Dorsum dark brown to black, usually with reddish or orange 

 longitudinal markings; vertex broadly concave between post- 

 ocelli; antenna? 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). 



(T. 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). 



