188 LYG^EINA. 



gins become there somewhat wider inwardly ; hinder angles obtuse, 

 with a strong callus within them ; posterior margin concave. Scu- 

 tellum triangular, apex long, acute. Elytra as long as the abdomen ; 

 Corium ; anterior margin very slightly curved and reflexed ; posterior 

 margin straight ; Membrane with 5 nerves ; the 1st 3 arising on the 

 outer half of the base ; the 1st very short (sometimes scarcely 

 visible), the 2nd longer, both ending on the anterior margin, the 

 3rd curved inwards at the base, then straight to the posterior mar- 

 gin ; the 4th and 5th arise near together at the inner basal angle, 

 curve inwards and then outwards, and are then straight. Sternum ; 

 Mesosternum in front with a short keel ; xyphus short, acute, de- 

 pressed. Legs moderate ; tliiglis ; 1st pair thicker than the others, 

 short-fusiform, on the underside with 2 or 3 very small teeth ; 

 tibicB straight, a little widened at the apex; tarsi; 1st joint on the 

 1st and 2nd pairs as long as other 2 joints, on the 3rd pair much 

 longer. 



Abdomen thick, above flat, beneath convex, almost ridged, the 2nd 

 segment with a slight keel ; Connexivum reflexed, deep at the base of 

 the abdomen. 



Species 1. PERITRECHUS LUNIGER. 



PACHYMERUS LTTNIGER, Schill. Beitr. 67, 5, t. 3, fig. 1 (1829) ; Paw. 

 F. G. 121, 1 ; H. Schf. Norn. Ent. i, 45 (1835). 

 LYGJSUS SAHLBERGII, Fall. Hem. Suec. 56, 13 (1829). 

 PERITRECHUS LTJNIGER, Fieb. Europ. Hem. 184, 3 (1861) ; Stal t Vet. 

 Akad. Forh. 218, 3 (1862). 



Black and ochreous, dull or slightly shining ; basal half of 2nd joint 

 of the antenna red ; corium posteriorly with 2 large, angulated 

 black and white spots. 



Head black, finely crenate-punctate, with very short, appressed, 

 golden hairs. Antennce black, basal \ of the 2nd joint red. Eyes 

 brown. Ocelli black. 



Thorax. Pronotwn almost as broad in front as the head across 

 the eyes ; anterior angles slightly rounded ; sides slightly sinuate 

 within the margin ; lateral margins nearly straight, ochreous, with a 

 black line on the edge, but becoming entirely black and narrower 

 beyond the place of their greatest width ; disk, 1st \ convex, with 



