402 Mr. T. D. A. Cockerell on 



The last six antennal segments measure thus in ^iii ; — (3) 199, 

 (4) 182, (5) 140, (6) 124, (7) 116, (8) 232 ; there is a hyaline 

 process at the end of the eighth segment. 



Larva. — Pale yellow, covered with white lamella?, which 

 form a high and thick dorsal crest, covering the back ; the 

 lateral lamellae are also well developed, with an especially 

 long one at each corner. 



Hah. On leaves of Garrya^ Dripping Spring, Organ 

 Mountains, New jMexico, middle of August, 1898 {(Jkll. and 

 Jof^e Mendoza). The females were producing young. 



0. garryce is a very distinct species, remarkable for its 

 green colour, high dorsal crest, and the very long tibia. The 

 Garrya is a tall shrub ; 1 find it in the herbarium of the 

 N, M. Exper. Station labelled '"'■G. ovata, var. Lindheimeri,^^ 

 but it cannot well be that, having glabrous leaves. It agrees 

 with the description of G. Wrightii, Torrey. 



Ortliezia monticola, sp. n. 



2 (adult). — Length about ]^ millim., with ovisac 4 mlUim. 



Body rather pale brown, legs and antennas dark chestnut- 

 brown. Dorsal surface naked, except for a very little mealy 

 powder, and two median rows of small white waxy tufts ; 

 lateral lamellse rather short ; caudal lamellae fairly long, about 

 equal in size. Ovisac broad, not curled upwards, dorsally 

 with the usual longitudinal ridges. Antennae 8-segmented, 

 the eighth with a little hyaline elongate-conical process at the 

 end. The antennal segments, measured in fifj,, are as 

 follows:— (1) 133, (2) 99, (3) ]16, (4) 99, (5) 99, (6) 83, 

 (7) 75, (8) 149 ; formula 8 1 3 (2 4 5) 6 7. The legs, mea- 

 sured in /jbfj,, are thus: — coxa 149; femur + trochanter 514; 

 tibia 514 ; tarsus 282 ; claw 66. 



Bah. At roots of grass, Dripping Spring, Organ Moun- 

 tains, New Mexico, middle of August, 1898 {Ckll.). The 

 locality is about 5600 feet above sea-level. 



0. monticola differs from 0. gramini's, Tinsley, by its 

 smaller size and much shorter ovisac and the arrangement of 

 the dorsal secretion in two lines with a dark space between. 

 From 0. nigrocincta, Ckll., it differs again by the two sepa- 

 rate lines of white dorsal tufts, and also by having the ridges 

 on the ovisac weaker, but sharper, and not quite so numerous. 

 From 0. insignis, Dougl. (which is a tropical insect), it 

 ditters by the dorsal stripes of waxy secretion being hardly 

 divergent at the middle, and the tufts composing them, espe- 

 cially the anterior ones, being thicker and longer, whereas ia 

 insignis the secretion is reduced to fine lines. 



