192 The Ohio Journal of Science [Vol. XVI, No. 5, 



Genitalia: Male — last ventral seginent not quite as lon<:^ as the penulti- 

 mate; plates roundly triangular, a little more than twice as long as the 

 last ventral segment, and longer than the pygofers. Legs a dirty 

 white. 



Described from one male. 



Habitat: Cape Town (Mally). 



Genus Thamnotettix Zett. 



Body oblong or oval, widest in the middle. Pronotum 

 strongly curved in front, the side margins short. Head usually 

 short. Scutellum generally as long or not quite as long as the 

 pronotum. Elytra longer than the abdomen and overlapping 

 at the apex. 



This genus is well represented in South Africa, Stal having 

 described a number of forms from the region of the Cape. 



Thamnotettix karrooensis sp. n. (PI. VIII, Fig. 2). 



General color brownish white. Length 3.5 mm. Breadth 



1.25 mm. 



Vertex white, with a dilute brown pattern, angularly rounded, the 

 length equalling the width between the eyes, and about one-third of the 

 distance across the eyes. Eyes large, dark brown, ocelli dark brown, 

 surrounded by clear white spaces. Face dull brown, the frons two and 

 a half times as long as the clypeus, and twice as long as its width between 

 the antennae; clypeus narrow, its sides almost parrallel, twice as long 

 as its width next the frons; lora; about equalling the clypeus in width. 

 Pronotum well rounded on its anterior margin, dirty brown in color, 

 with an irregular pattern, one and a third times as long as the vertex; 

 sternum yellow; black spots on the pro-, meso- and metapleura. 

 Scutellum almost as long as the pronotum, with brown markings on the 

 middle and at the basal angles. Elytra a dull white, the veins distinctly 

 marked with fuscous, the outer margin of the corium white, except for 

 the minute brown spots. Abdomen dorsally black, with yellow margins, 

 ventrally dirty white, with black on the base and the middle. Genitalia : 

 Female — Last ventral segment two and a half times as long as the 

 preceding, the posterior margin inwardly rounded and slightly produced 

 on the middle; pygofer one and a half times as long as the width at 

 base, and three times as long as the last ventral segment; ovipositor a 

 little longer than the pygofers. Male: Valve brown, with a ^^cllow 

 border, last ventral segment equalling the penultimate in length, but 

 not quite as long as the valve ; plates long and narrow. 



Described from numerous examples of males and females 

 from Beaufort West, C. P. (Mally). 



Thamnotettix karrooensis var. pallidus. 



Form and shape the same as T. karroensis. General color light 

 yellowish to whitish, with the brown coloration generally absent. Face 

 light vcllow, the frons marked with dilute brown arcs. Ocelli san- 



