THE CANADIAN ENTOMOLOGIST. 213 



evenly rounding, whole segment curved around the pygofers until 

 it appears to be only broadly and shallowly excavated on the 

 median third. Pygofers long, but considerably exceeded by the 

 elytra. Male, valve stout, obtusely angular with a strong median 

 ridge either side of which the lateral margins are semicircularly 

 depressed, giving the appearance of a waved margin and a notched 

 apex, plates together bluntly spoon-shaped, their apices slightly 

 parted and heavily clothed with coarse hairs; just visible above 

 these are two long curved hooks. 



Described from eight examples from California collected by 

 the author in July and August, 1912. This is the most strikingly 

 marked species in the genus, and, while the genitalia are slightly 

 variable, its size and colour pattern will at once distinguish it. 



Thamnotettix januata, n. sp. 



Resembling flavocapitata, but smaller, darker and with a 

 shorter vertex. Pale brown with the vertex light yellow. Length 

 4.75 mm. 



Vertex twice wider than long, obtusely angled, one-fourth 

 longer on middle than against the eye; disc convex in both diameters, 

 the apex bluntly subconical; face convex, front long, narrow, 

 wedge-shaped, clypeus long, the apex expanded. Pronotum broad 

 and fully a third longer than the vertex. Elytra long, narrow and 

 posteriorly appressed. 



Colour — Vertex lemon yellow, sometimes with a faint brownish 

 line just back of the anterior margin and parallel with the basal 

 margin. Face and below pale straw. Pronotum olive brown, with 

 the anterior margin narrowly lighter, scutellum washed with 

 orange. Elytra olive brown with costal margin shading out to a 

 subhyaline. Whole insect slightly coppery iridescent. 



Genitalia — Female segment nearly twice wider than long, 

 the whole posterior margin obtusely, angularly excavated with a 

 narrow median strap-shaped tooth which extends beyond the 

 lateral angles. Male, valve oval convex, plates together, slightly 

 longer than wide with the apices slightly filamentous. 



Described from four examples from San Francisco, Cal., 

 collected by the author. A small and obscurely marked but quite 

 distinct species. 



