LITTLE-KNOWN SPECIES OF MEMBRACID^. 335 



obvious in some examples than in others. There is also a greyish sheen spread over the 

 basal portions of the wings. 



Hab. Cameroons. Size 8x4 millimetres. 



Ophicentrus serpentarius, sp. n. (Plate 22. fig. 7.) 



This species is characterized in great part by the sinuous form of the posterior process 

 or horn. Althovigh the examples given by Canon Fowler in the Biol. Centr.-Amer. are all 

 American, this species from Africa and from Tasmania has its significance. 



Colour dark brown, showing a slight grey pubescence. Metopidium high. Posterior 

 horn stout, much gnarled and bent into a tapering curve shorter than the tegmina, which 

 last are warm reddish fuscous with dark neuration and a corrugated limbus. Legs 

 stout. Abdomen and the rest of the body dark brown. 



Sab. Cameroons. Size 8x4 millimetres. 



Musee de Madrid. 



There are other smaller specimens in the same Museum which have broad fuscous 

 bands on the tegmina, and these as varieties may be designated Ophicentrus minor var., 

 from the Cameroons. 



POLOCENTRUS LABATUS, sp. n. (Plate 22. fig. 10.) 



This genus is characterized by the clavate apex of the posterior horn, which is serrated 

 below the clubbed extremity. The suprahumerals are short and obtuse by the profile 

 aspect. Colour ochreous-orange, mottled with fuscous. Frons square and brown. 

 Legs stout, flat, with yellow tibiae. Tegmina with yellow cellules and with broad brown 

 nervures. 



The usual habitat of the genus appears to be Southern India, bvit this species is from 

 Abyssinia. 



Musee de Madrid. Size 8x4 millimetres. 



PoLOCENTRUS CAUDATUS, sp. n. (Plate 22. fig. 9.) 



Suprahumerals shorter and more erect than in P. lobatus, and the tegmina not 

 brocaded with brown but diaphanous. Colour uniformly bright ochreous yellow. Legs 

 flattened and almost spatulate. The clavate apex of the posterior horn is lai-ge and 

 serrated on the lower margin. 



ILab. Natal. Size 8x5 millimetres. 



Trapezoid A hirsuta (genus et species nov.). (Plate 22. fig. 11.) 



The pronotum quite covers the scutellum and is domed in outline when seen from 



the side, bvit it has a somewhat four-sided outline from the dorsal aspect. Tiie tegmina 



ample, broad, and longer than the posterior horn. Metopidium square, Avith short 



sup rahumerals . 



Frons covered with hairs. Eyes prominent. Legs with black femora and yello>v- 



fringed tibia\ Colour uniformly dark fuscous, but with a yellow carina on each of the 



