288 HOMOPTERA 



previously made legardiiig the questionable value of this character again applies. Xiphistoides has the 

 same important characters as Xiphistes in the matters of the four apical cells of the hind wings and the 

 absence of the ampliated inferior keel of the posterior process. Head subquadiate, longer than wide, 

 roughly sculptured; base highly arcuate, strongly sinuate and feebly bituberculate; eyes ovate, somewhat 

 flattened laterally; oceUi large, prominent, about equidistant from each other and from the eyes and 

 situated a little above a Une drawn through centers of eyes; inferior margins of genas lobate, quadran- 

 gular, foliaceous, corners sharply angulate; clypeus longer than broad, extending only a little below the 

 inferior lobes of the genae, tip rounded and pilose. Pronotum convex, gibbous, unarmed in front, 

 roughly sculptured; metopidium sloping, broader than high; median carina roughly and irregularly 

 percurrent; humeral angles heavy and blunt; no suprahumeral horns; posterior process straight, heavy, 

 tricarinate. tectiform, impinging on tegmina, no expanded inferior keel, tip blunt and reaching just 

 beyond the internal angles of the tegmina; scutellum entirely concealed. Tegmina broad and hyaline; 

 base coriaceous and punctate; veins strong; five apical and four discoidal cells; tip rounded; apical 

 limbus broad. Legs short and stout; all three pairs of tibiae broadly flattened and foliaceous; hind 

 tarsi longest. 



Type carinatits Funkhouser. 



Geographical distribution : Two species, both from .'\frica, have been assigned to thisgenus. 



1 . carinatus Funkhouser, Ann. Mus. Acad. U. S. S. R. XXVHI : 47 Africa, Victoria Nyanza, Bud- 



(1927). — Pl. I4,fig. 255. du Forest, Itara. 



2. iiiermis Jacobi, Kil. Exp. XII : 7. 119 (1910). Africa, Nyasaland, Zomba. 



GENERA OF THE TRIBE DARTHULINI TRIBUS NOVUS 



I. Pronotum unarmed 



A. Af>ex of abdomen extended in a long spine Dakthula Kirkaldy. 



B. Apex of abdomen normal Coloborrhis Germar. 



II. Pronotum ziiith suprahumeral liorns Hemicentrus Melichar. 



288. Genus DARTHULA Kirkaldy 



Darthula Kirkaldy, Ent. XXXIII : 242 (1900). 

 Urophora (preoccupied) Gray, Anim. Kingd., Ins. II : 261 (i832). 



Characters : Although represented by only a single species, this genus is quite remarkable and 

 fully desnrves to stand as the type genus of a small but very distinct tribe. It is characterized first of 

 all by the absence of a posterior process but chiefly by the peculiar spine-Iike extension of the abdomen 

 and the finely reticulated tegmina. The type species is a curious insect with unusual structure and 

 coloring and is one of the largest of aU of the Membracidas. Head sublunar, twice as wide as high, 

 distinctl)' curved on its horizontal axis, very roughly sculptured; base highly arcuate and much sunken 



Notes : i. The n;eniis Porcorlnims Goding was described as amembracid (Goding igoS) and was placed in the group 

 which would be represented by this tribe by the same author (Goding 1934) but China (China 1924) transferred 

 this genus to the Jassoidea. 



2. The genus Eufroggaltia Goding was also described as a membracid (Goding igo3) but was shown by China 

 (China 1927) to belong to the family Peniatomida. 



