506 LIST OF HOMOPTEROUS INSECTS. 



5. OxYRHACHis Gambia. 



Oxjrliachis Gambiae, Fairm. Ann. Soc. Ent. Fr. 2me Sene, iv. 

 269, 4. 



Senegal. 



6. OXYEHACHIS SUBSEREATA, FeiH. 



Picea ; pi'othnrax ferrugineo varius ; cornua dorsalia lata, acuta, 

 divaricata, fere plana ; cornu posticum abdomen superans un- 

 dulatum, apice nigrum suhascendens et subtus serratum ; pedes 

 luridi ; femora nigra ; alee luridce, basi nigrce. 



Pitchy, clothed with tawny down : head flat above, hardly 

 broader than long, a little narrower than the fore-chest, notched and 

 with a quadrate membrane on each side in front; disk slightly im- 

 pressed ; hind border slightly convex ; face narrow, black, obconical, 

 occupying half the length of the head : fore-chest thick, roughly 

 punctured, partly ferruginous, rising vertically above the head, 

 slightly ridged ; shoulders obtusely angular, not prominent ; above 

 them are two very broad acute prismatic almost directly diverging 

 horns ; angles of the horns slightly ridged ; lower sides and hind 

 sides slightly concave; upper side slightly convex, broader than 

 the lower side, much broader than the hind side ; behind these the 

 fore-chest forms a long hoi'n which extends far beyond the tip of the 

 abdomen ; it is compressed and quadrilateral, and forms above two 

 long and very gentle curves; behind these it is black, very obliquely 

 inclined upward, and obliquely serrated beneath: legs lurid, clothed 

 with pale yellow hairs ; thighs black; shanks dilated: wings lurid, 

 punctured at the base, black at the base along the fore borders, fer- 

 ruginous towards the hind borders ; veins of fore-wings pitchy, 

 clouded, tawny towards the base of the fore border. Length of the 

 body 4^ lines ; of the wings 9 lines. 



a. Congo. Presented by Sir J. Richardson. 



7. OXYRHACHIS RUFESCENS, Fcm. 



Picea, ferrugineo varia, pedes fcrruginei ; tibice subdilatata ; al(S 

 limpidce ; alee anticce basi picece. 



Nearly allied to O, subjecta. Pitchy, clothed with whitish hairs : 

 head black, transverse, thinly punctured, not much broader than 

 long, a little narrower than the fore chest, slightly impressed in front, 

 ferruginous and slightly convex along the hind border, ferruginous 

 about the eyelets, ferruginous and truncated on each side of the face 



