508 ANTHOCORINA. 



Crown quadrate ; Face short, narrow, cylindrical, the end obtuse ; 

 side lobes very narrow. Antennce slender, 1st joint reaching almost 

 to the end of the face ; 2nd slightly clavate, 3 times as long as the 

 1st ; 3rd and 4th thinnest, each about \ as long as the 2nd, 3rd 

 filiform, 4th slightly fusiform. Fyes oval, prominent in front. 

 Ocelli large, inserted between the eyes close to the base of each. 

 Nostrum reaching beyond the 1st pair of coxte ; 1st joint short ; 2nd 

 long ; 3rd more than \ the length of the 2nd. 



TJiorax. — Pronotum trapeziform ; almost uniformly flat, w^th a 

 longitudinal, linear, central depression ; anterior angles deflected ; 

 sides almost straight, the margin in front incrassated ; posterior 

 margin regularly concave from end to end. Elytra; Emholiuni 

 narrow, widened and concave beyond the middle ; Cuneus rounded 

 at the apex, but wider than the base of the membrane ; claval suture 

 depressed ; Membrane with 4 equidistant nerves. Sternum ; Meso- 

 sternum narrowed behind, broadly obtuse, with a middle keel ; 

 Metasternum cordate, flat, the margin reflexed. Legs ; thighs broad, 

 fusiform, the 2nd pair shortest and narrowest ; tibice ; 1st pair'a little 

 widened to the apex ; tarsi slender ; 3rd pair longest ; 2nd joint 

 longest. 



Species 1. — Xylocoris ater. 



Xylocobis atee, L. Buf. Au. Soc. Ent. Tr. ii, 106, 2, pi. 6, b, fig. 3 

 (1833); Bum. Haudb. ii, 290, 2 (1835); Bdr. 

 Berl. Eut. Zeits, ii, 196 (1858) ; Fieb, Europ. Hem. 

 142, 1 (1801). 



Anthocokis obscueella, Zett. lus. Lap. 265, 4 (1840). 



Xylocoris obscurellus, Sahib. Geoc. Eeii. 81, 3 (1848). 



— (Xylocoris) ater, Flor, Rhyn. Liv. i, 667, 1 (1860). 



Black, smooth, shining. 



Head. — AntenncB ; 1st joint black ; 2nd yellowish-brown ; 3rd 

 and 4th piceous. Eyes black. Ocelli red. Eostrum piceous, the 

 end yellow. 



Thorax. — Pronotum sometimes piceous on the posterior margin. 

 Elytra black or piceous ; Embolium black ; Membrane fuscous, the 

 base paler. Legs ; thighs black ; tihice and tarsi yellowish-brown. 



Length, 1 — Ii line. 



Gregarious, under the loose bark of dead firs, and other trees, 

 nearly all the year round. 



