xv, 2 Crawford: Jumping Plant Lice 201 



rowing toward apex. Female genital segment about three-fifths 

 as long as abdomen, converging to an acute point, dorsal valve 

 a very little longer than ventral. 



Luzon, Mount Banahao (Baker), 1 male: Benguet Subprov- 

 ince, Baguio (Baker), 1 female. 



Megatrioza hirsuta Crawford. 



Kuivayama hirsuta Crawford, Rec. Indian Mus. 7 (1912) 427, pi. 33, 

 figs. V, Y; pi. 35, fig. I. 



With additional material of this species available for compar- 

 ison, it now appears that it must be referred to Megatrioza. 

 The wing venation, the spurred hind tibiae, the anterior meta- 

 coxal projections, and the gall-forming habit, all relate this un- 

 doubtedly to this genus rather than to Kuwayama, in which it 

 was first placed with much hesitation. The gense are scarcely 

 swollen beneath the vertex and not at all conical, but there is a 

 strong tendency in Megatrioza toward the suppression of the 

 genal cones. The large size and the hairy head and thorax make 

 this a striking species. 



India, Lonavla, Bombay (H. H. Mann) , 1 male, in galls on 

 Terminalia tomentosa, July, 1916. 



Genus CEKOTRIOZA Crawford 



Head scarcely declivous, rather long; vertex produced in front 

 into two hornlike epiphyses; gense produced into cones directed 

 forward ; antennae slender. Thorax not strongly arched, narrow ; 

 hind tibiae with small basal spur or callus and subapical spine 

 (as in Megatrioza) . Forewings narrow, opaque or semiopaque, 

 maculated, first marginal cell usually larger than second; hind 

 wings nearly as long as forewings. 



Type of the genus, Cerotrioza bivittata Crawford ('18: 454). 



This genus appears to be related to, probably sprung from, 

 Megatrioza but differs sharply in the thickened and semiopaque 

 forewings and peculiarly shaped vertex. The type species is one 

 found in the Hawaiian Archipelago. 



Key to the species. 



a\ Genae produced into more or less conical processes directed forward, 

 without dark vitta on each side of body. 

 6\ Length of insect to tip of folded wings about 3 millimeters; color 

 dark brown ; vertex horns nearly half as long as genal cones. 



(Singapore.) 0. corniger sp. nov. 



b 1 . Length to tip of folded wings about 4 millimeters; vertex horns much 

 smaller. (Borneo.) C. microceras sp. nov. 



