THE CANADIAN ENTOMOLOGIST. 339 



Thanmotettix Cockerelli, n. sp. — Form and general appearance of 

 Kennicottii nearly, with indistinct red mottlings. Length, 5-6 mm.; 

 width, 1.5 mm. 



Vertex more than twice wider than long, very little produced in the 

 middle, bluntly angled, with the front transversely depressed behind the 

 middle ; face parallel margined to below the antennae, then narrowing to 

 the nearly parallel-margined clypeus ; elytra rather long and strongly 

 appressed behind. 



Colour : vertex, face, anterior margin of pronotum and scutellum 

 pale yellow, disc of pronotum and elytra grayish brown with a strong 

 coppery reflection, the whole insect mottled with blood red, veins on 

 elytra light, sutures of front black-lined. 



Genitalia : ultimate ventral segment of the female very long, nearly 

 as long as the pygofers, posterior margin broadly and evenly rounding ; 

 male valve short, rounding, plates broad at base, evenly rounding to 

 beyond the middle, then produced as acute style-like points, the lateral 

 margin, especially of the points, heavily fringed with stout hairs ; a dark 

 line just inside the margin at the base. 



Described from numerous specimens from Ward, Rist Canon, 

 Marshall Pass, and Palmer Lake, Colo. Taken from well back in the 

 foothills up to 9,500 ft. 



Thamnotettix perexigua, n. sp. — Resembling Chlorotettix lusoria 

 and necopi?ia, but without the fulvous colour. Length, 8 mm.; width, 2 mm. 



Vertex but little longer on middle than at the sides, roundingly 

 angled, transversely depressed across the disc ; front broad, only slightly 

 convex in either diameter; clypeus long, slightly constricted in the 

 middle ; pronotum with the lateral margins long, humeral margins short ; 

 elytra long, strong, scarcely narrowing behind. 



Colour : Vertex and face slightly greenish-orange, a spot above and 

 another below each ocellus, a waved line along the anterior margin of the 

 vertex, broken in the middle, fuscous ; pronotum with a little more of the 

 green than the vertex ; elytra a bright greenish-yellow, subhyaline, 

 showing the dark tergum ; below bright yellow. 



Genitalia : Male valve very short, one-third the length of the 

 ultimate segment, a blunt tooth in the centre ; plates long, compressed, a 

 furrow running obliquely through each one, the part outside the furrow 

 curving up and forming a somewhat boat-shaped organ ; at the apex of 



