378 HVMENOPTERA ACULEATA. 



then more or less suddenly slopes down to the base ; the 

 upper margin in this species is fringed with very long hairs ; 

 the armature also is quite characteristic ; the lacinia is 

 exceedingly long, curved, and emarginately truncate at the 

 apex, the inner angle of the truncature produced into a 

 curved tooth, the rest of the lacinia is in the form of a 

 convex lobe ; sagittre dentate beneath, turned outwards at 

 the apex, dilated and obliquely truncate. 



? and 5 uaay be known from terrestris, which they most 

 resemble, by the longer face and cheeks, the latter being 

 nearly as long as their apical width, by the less definite 

 yellow abdominal band which generally extends on to the 

 basal segment, which gives it a less straight appearance, 

 and also by the less compressed apical ventral valve. 



L. 10-17 mm. 



Bare. Ilfracombe ; Yarm, Yorkshire ; (iJiicZcZ). Carlisle; 

 (Heysham). UrightonDowns; {S. S. Saunders). Croydon; 

 Ipswich; (Bothney). Eugby ; [Morice). Hertfordshire; 

 {Piffard). 



B. terrestris, Linn, {lucorum, Smith, virginalis, Kirh.). 

 — Head clothed with black hairs, or in var. luconmi cj on the 

 face with yellow, face short, the cheeks shorter than their 

 apical width ; antennae of the (J shorter than in most of the 

 species, scarcely reaching to the tegulae, third and fifth 

 joints subequal, fourth a little more than half as long as 

 the fifth; thorax clothed with black hairs, a band in front, 

 and often in the c? also one behind, yellow ; in some 

 varieties of the 3 of var. lucorum the yellow hairs almost 

 cover the whole thorax, leaving only a narrow black band 

 between the wings ; hairs of the abdomen variable in colour, 

 black on the basal segment, yellow on the second, black 

 on the third and fourth, and white or tawny on the 

 apex of the fourth and the remaining segments, or with 

 the first to the fourth segments yellow-haired in the <S , the 

 base of the third and fourth with a narrow black band ; 

 between these extremes various varieties occur, the colour 

 of the yellow is also variable, in var. lucorum it is nearly 



