CEPHUS NIGER. ' 121 



A species easily known by the almost continuous 

 yellow band on the abdomen. 



Seemingly not common. South of England, Hert- 

 ford, Cambridge, Whittlesea Mere, Dover, Southgate 

 (Stephens). 



Continental distribution : Sweden, Germany, Spain, 

 Italy, North Africa, Syria. 



7. CEPHUS NIGER. 



Syrex niger, Harris, Exp. Ins., p. 94, pi. xxviii, fig. 2 (1776). 



- troglodyta, Fab., Mant., i, 258, 17 (1787). 

 Astatus troglodytus, Pz., F. G., 83, pi. xii ; Klug, Mon. Sir., 49, 



pi. vi., fs. 1, 2, a, 6. 

 Cephus troglodytus, Htg., Blattw., 360, 1 ; Lep., Mon., 20, 59 ; 



Ste., 111., vii, 104, i ; Costa, F. N., Cef. 3; 



Thorns., Hym. Sc., i, 321, 4; Andre, 



Species, i, 548; Cat. 67,* 34. 



Black ; mandibles, the fourth and sixth abdominal segments all 

 round, and a triangular mark on the side of the third and seventh, 

 yellow ; knees, tibiae, and tarsi testaceous ; apex of posterior tibiae and 

 the greater part of the hind tarsi fuscous. Wings hyaline, stigma 

 testaceous. 



Length 7 8 lines. 



This is a larger species than pygmseus, the antennas 

 are shorter and less thickened towards the apex ; the 

 yellow bands on the abdomen are narrower, and there 

 is no yellow on the last segment ; the stigma and ner- 

 vures, too, are testaceous, not black as in the common 

 species ; the $ is readily known by the black breast, 

 and the legs do not differ in coloration from those of 

 the ? . 



Not common. London district. Hertford (Stephens). 



Continental distribution : Sweden, France, Germany, 

 Hungary, Switzerland, Italy. 



