( 183 ) 



Type : T. lateralis spec. nov. 



In this genus belongs also Prosopocera jnctiventris (1857) Chevr. 

 The two insects belong to the " Omacanthides " according to Lacordaire's 

 definition ; but I think they are more nearly related to Mijcerinicus. 



\m. Tetraulax lateralis spec. nov. 



'i . Similar to A. pictiventris, sides of meso-metasternnm and abdomen 

 chalky white, and the sides of the elytra washed with the same colour, the species 

 resembling pictiventris in this respect almost exactly. The eye of the new species 

 is much larger, the lower lobe being very little higher than broad, and four times 

 as high as the cheek ; the two halves of the discal sulcus of the pronotam unite 

 in middle of disc, and are far less strongly curved than in pictimntris, each 

 representing in the latter species a semicircle. Head clay-colour like prothorax, 

 the front of the head not being white as in picticentris. Distal segments of 

 antenna white at base, these white rings widest on the last segments. 



Length, 17 mm. ; breadth, 6 mm. 



Hab. Benito, French Congo. 



One ¥. 



Planodema (1860) Thoms. 



This genus is based on P. scorta (1868). The two species known to me 

 differ from Thcocris, besides the rectangular frons, in the less slender body, much 

 more convex elytra, and in the anterior transverse groove of the pronotum being 

 very shallow above. 



101. Planodema unicolor spec. nov. 



? . Olive-black, brownish beneath, covered with a short greyish pubescence 

 which does not conceal the structure of the skeleton. No markings, except a thin 

 line laterally behind the eye extended on to the pronotum, and a tiny grey lateral 

 dot on the first four abdominal segments ; hairs of anal groove ochreous ; 

 pubescence of tibiae yellowish ; antennal segments 3 to 1 1 grey at base. Lateral 

 tubercle of pronotum larger than in scorta, the side of the pronotum slanting from 

 this spine to the anterior constriction. Elytra rather denser punctured at base, and 

 more granulate than in scorta. 



Length, 19 mm. ; elytra, 14 mm. ; breadth, 6i mm. 



Ilab. Benito, French Congo. 



One ?. 



Theocris (18.58) Thoms. 



The two species described below agree with the type-species {sagra) in the 

 trapeziform frons, but they differ markedly in the prothorax. This has a small 

 obtuse side-tubercle in sayra, the sides of the prothorax appearing almost parallel, 

 while the two new species have a large side-spine, which stands less close 

 to the basal constriction, the sides of the thorax converging from this tubercle 

 to the subajiical groove. 



The abdomen of the ? of Theocris sagra has a hairy anal cavity like the ? ? 

 of Planodema and l)ocus,\i\\t it is smaller. The <?<? of the two new species have 

 the last (visible) abdominal tergite (7th segment) hairy and bilobate. 



