March, 1916] Ilomopterous Studies. Part I 193 



guineous. Genitalia female : last ventral segment almost two and a half 

 times as long as the penultimate, white with brownish markings on the 

 anterior half. Male: last ventral segment a little longer than the pre- 

 ceding. Males distinctly brow^n on the middle of the ventral part of 

 the abdomen, the lateral margins yellow. 



This variety was described from nine females and three 

 males which were separated from T. karrooensis, on account 

 of the absence of brown color pattern, and the general pre- 

 dominance of yellow. 



Habitat: Beaufort West, C. P. (Mally). 



Thamnotettix cotula sp. n. (PI. VIII, Fig. 3). 



General color yellowish brown. Length 3.5 mm. Breadth 

 1.25 mm. 



Female: Head with the eyes prominent, vertex almost as long as the 

 pronotum, fuscous yellow in color and characteristically marked with 

 ten brown to black spots — -two situated on the middle, one on either 

 side of the median line, two somewhat smaller alongside these, but 

 nearer the eyes, two large angular spots near the anterior margin, 

 located close to one another and to the median line, two smaller spots on 

 the anterior margin in advance of these ; the other two spots are on the 

 anterior half close to the lateral margin. The arrangement of these 

 spots gives the insect a very characteristic appearance. Vertex acutely 

 angled. Face strong, the frons fuscous with light arcs; clypeus almost 

 twice as long as its width, less than half as long as the frons. Eyes 

 large, dark steel gray; ocelli colorless located very close to the eyes. 

 Pronotum fuscous yellow, equalling or a little longer than the vertex. 

 Scutellum shorter than the pronotum, of the same yellow brown color. 

 Elytra yellowish, transparent, the claval area irregularly marked with 

 fuscous; apical cells fuscous at their borders. Abdomen above black, 

 with yellow borders, beneath yellow. Legs light yellowish wdth alter- 

 nate bands of fuscous on the coxag and femora. Genital apparatus: 

 ultimate ventral segment somewhat narrow, a little longer than the 

 previous one, posterior margin notched at the middle, and rounding 

 slightly to the sides; pygofers dark colored, twice as long as their wddth 

 at base ; spines strong and stout fonning a rough crown at the tip of the 

 ovipositor; the latter is longer than the pygofer, and is black at the 

 sides and tip. 



Male: General color the same as for the female; vertex shorter; the 

 fuscous markings on the apical cells absent or not as prominent. 

 Abdomen beneath dark brown. Genitalia: last ventral segment yellow 

 on the middle, black at the sides, equalling the penultimate in length; 

 valve semi-circular, small, not well exposed; plates angular at the tips, 

 one and a half times as long as the last ventral segment; pygofers longer 

 than the plates, rounded laterally; spines large. 



Described from one male and one female. 

 Habitat: Cape Town (Mally). 



