154 THE ENTOMOLOGIST. 



Vertex riigosely punctured, the front closely longitudinally reticu- 

 lated-striated. Clypens as long as it is broad, rounded broadly above, 

 the apex with an incision on its apex, where it is wider than its 

 greatest length ; it becomes gradually wider towards the apex, the 

 sides being sharply pointed. Apices of mandibles rufous. Temples 

 reticulated-punctured closely. Apexof pronotum transverse, the lateral 

 angles not acute. Pro- and mesopleurge more coarsely rugose than 

 the mesonotum ; the metapleurte, except near the base above, closely 

 striated obliquely, the strife intermixing and forming almost reticula- 

 tions in places. Lateral angles of metanotum forming, with the base, 

 almost a triangle, i.e. the sides are produced into a blunt point in the 

 middle. Scuteilum quadrangular, broader than long, its base obliquely 

 sloped. Apex of post-scutellum smooth, obliquely sloped. Centre of 

 metanotum hollowed, smooth ; the keel in the centre widened towards 

 the apex. Basal abdominal segment cup-shaped ; the second slightly 

 longer than the width at the apex, which is smooth and turned up. 

 The fiagellum of antennas is brownish beneath ; the hook is brown, 

 stout, reaching to the apex of the joint. There are two lines on the 

 post-scutellum. 



Comes near to 0. posticus and O. silvaensis. The former I 



do not know in nature, but the latter may be separated from my 



species as follows : — 



Apical segments of abdomen and basal half of antenna 

 red, a yellow line in the eye-incision, the sides of the 

 median segment not dilated in the middle (some- 

 times yellow) ...... silvaensis, Sauss. 



Apical segments of abdomen and antennae not red, no 

 yellow line on the eye-incision, the sides of median 

 segment dilated in the middle . . . vaalcnsis, sp. nov. 



The specimens of silvaensis which I have seen (there is a 

 specimen from the Transvaal in the Albany Museum, Grahams- 

 town) is Saussure's variety, they having the post-scutellum and 

 sides of metanotum yellow. The tibise, too, are yellow on the 

 outer side ;c/. Saussure, ' Vespides,' i. p. 214). 



NEW CULICIDiE FEOM THE WEST COAST 

 OF AFEICA. 



By Fred. V. Theobald, M.A. 



(Concluded from p. 104.) 



Genus ^dimorphus, Theobald. 

 (Mono. Culicid. iii. p. 290, 1903 ; Genera Insectorum, Culic. 

 p. 20, 1904.) 



^DIMORPHUS ALBOANNULATUS, n. Sp. 



Head dark brown ; proboscis black, with a white band on the 

 apical half. Thorax deep rich brown, with scanty golden scales ; a 

 silvery white spot on each prothoracic lobe; pleurae pale brown, with 



