FAM. MEMBRACID^ 287 



narrow. Legs shoit and stout; fenioia .somewhat fiattened ; lirst and second pairs of tibiae expanded 

 and foliaceous; hind tarsi longest. 



Type caiteri Finikhouser. 



Geographical distribution : This genus is known only from the tj-pe species from Africa. 



I. carteri Funkhouser, Journ. N. Y. Ent. Soc. XLIII : 4. 480 (igSS). — Africa, Goki Coast. 

 Pl. 14, fig. 253. 



286. GENUS OXYRHACHIDIA Melichar 



Oxyrhachidia Melichar, Hom. Ceylon 118 (igo3). 



Characters : Tiiis genus differs from Oxyrhachis in practically no respects except the absence 

 of suprahumerals. We have already expressed our doubt, in connection with other genera, as to the 

 value of the suprahumeral horns as a generic character, since in some genera and even, in rare cases, 

 within a species, we find both armed and unarmed forms, and between certain closely related genera 

 we find the gradation from the armed to the unarmed species so gradual that it is impossible to draw 

 a definite dividing line. However, if the absence of suprahumerals in Oxyrhachidia proves to be a 

 constant character (at present only one species has been described in the genus) we have no reason for 

 refusing to accept the genus as valid. Like the forms of Oxyrhachis, the type species of Oxyrhachidia 

 shows the compressed ampliated inferior keel on the posterior process and the three apical cells in the 

 hind wings. Head subquadrate, a little wider than long, semifoliaceous, roughly sculptured; base 

 strongly arcuate and sinuate and weakly bituberculate ; eyes small and flattened; ocelli large, conspic- 

 uous, about equidistant from each other and from the eyes and situated on a line drawn through centers 

 of eyes; inferior margins of genas extended downward in square, flat, sliarply angulate foIi;iceous lobes; 

 clypeus longer than vvide, extending only slightly below inferior margins of genae, tip rounded. 

 Pronotum convex, gibbous, without suprahumerals ; metopidium sloping, wider than high, llattened 

 above; median carina strongly percurrent; humeral angles heavy, subconical and blunt; no supra- 

 humeral horns; posterior process heavy, tricarinate, tectiform, slightly concave in the middle and 

 upturned at the apex, a flattened keel on the undersurface of the apical half, tip blunt and extending just 

 beyond the intemal angles of the tegmina; scutellum entirelv concealed by the pronotum. Tegmina 

 broad, hyaline; base coriaceous and punctate; veins very strong and raised; five apical and four 

 discoidal cells; tip rounded; apical limbus very narrow. Legs short and heavy ; femora roughly 

 cylindrical; all three pairs of tibiae broadly flattened and foliaceous; hind tarsi longest. 



Type iiieuiiis Stal. 



Geographical distribution : Oxyrhachidiais known only from StaTs species from Ceylon wliich 

 was designated as the type of the genus. 



I. iiiermis Stal, Bid. Memb. Kan. 283. i (1869). — Pl. 14, flg. 254. Ceylon, Peradeniya. 



287. GENUS XIPHISTOIDES GODING 



Xiphistoides Goding, Ann. Ent. Soc. Amer. XXIV : 936 (igSi). 

 Xiphidia (preoccupied) Goding, Jouni. N. Y. Ent. Soc. XXXVIII : 92 (igSo). 



Characters : This genus differs from Xiphistes in the same way in which Oxyrhachidia differs 

 iVoni Oxyrhachis, namely in the absence of suprahumerals, and the saine cominents whicli we have 



