STENOCEPHALlDiE. 141 



reflexed. Underside convex; last segment in (^ cut out at the sides, 

 and posteriorly, before the uiargiuj constricted ; in $ , the 5th seg- 

 ment is shortest in the centre and raised; the 6th segment flat- 

 tened at the sides, and in the centre drawn into an angulated ridge ; 

 the anterior margin sloping on each side obliquely ; posterior margin 

 concave. Genital segments; above, in (^ , one large, globose, clasped 

 at the sides by the long points of the 2nd segment : in ? , one segment 

 is visible, short, narrowed posteriorly, and with the posterior 

 margin short and slightly emarginate ; beneath, in ^J , as on the 

 upper side ; in ? , in the centre is one short plate, which appears to 

 be divided into 2 by a strong ridge, the posterior margin concave, so 

 that 2 points project ; at the base, on each side, the 2nd segment 

 appears as an angular plate, the point of which is shorter than the 

 central bilobed plate. 



Species 1. — Stenocephalus agilis. 



CiMEX AGILIS, Scop. Eut. Caru. 126, 3C6 (17G3) ; Sckrk. F. B. ii, 82, 

 1125 (ISOl). 

 — NUGAX, Fad. Sp. Ins. ii, 366, 171 (17S1) ; Rossi, F. E. ii, 216, 

 1333 (1790). 

 Lyg^us NUGAX, Fab. E. S. iv, 162, 93 (1794) ; IFolf, Ic. Cim. 30, t. 3, 



fig. 30 (1800). 

 CoEEUS NUGAX, Fab. S. E. 200, 42 (1803) ; Lam. Hist. Nat. iii, 495, 4 

 (1816) ; L. Duf. Rech. 37, 4 (1827) ; Schiil. Beitr. 

 48, 11, t. 5, fig. 2 (1829). 

 DiCEANOMEKUS NUGAX, Ha/m, Wanz. i, 22, t. 3, fig. 13 (1831). 

 Stenocephalus nugax, Burm. Handb. ii, 328, 1 (1835) ; Ramb. F. And. 

 ii, 129 (1842). 

 — agilis, Fieb. Europ. Hem. 223, 145, 1 (1861). 



Brown-black, with a ground colour of ochreous showing through, 

 covered with fine, round punctures. 



^ea^ smooth, black. Antennce ; 1st joint black; 2nd, the base 

 narrowly, the apex broadly black, the remainder yellow with a faint 

 brown ring in the centre ; 3rd and 4th black, narrowly yellow at the 

 base. Eyes and Ocelli black-brown. Rostrum piceous, 1st joint 

 pale yellow ; the sides of the rostral channel yellow. 



Thorax. — Fronotum brown-black on an ochreous ground colour, 

 darkest in front, finely punctured, the tip of the hinder angles 



