314 HYMENOPTERA ACULEATA. 



with hairs and somewhat dilated, ? with the fifth segment 

 very finely punctured and clothed apically with fine brown 

 pubescence, sixth widely lanceolate, with a slight subapical 

 constriction ; legs clothed with short whitish hairs, calcaria 

 black, outer calcar of posterior tibiee blunt. 



L. 13-15 mm. 



Isle of Wight ; Sandown, flowers of bramble ; Shirley ; 

 Wimbledon ; Lowestoft ; Morthoe, N. Devon ; Yorkshire ; 

 {Smith). Portland; (Dale). Occurs in July and August. 

 The blunt exterior calcaria of the hind tibise and the short 

 triangular spots on the sides of the abdomen at once dis- 

 tinguish this species. Smith says it is parasitic on. Megachile 

 maritima. 



C. quadridentata, Li^in. — Black ; head and thorax dull, 

 very closely, largely, and rugosely punctured, clothed with 

 brown hairs, the pubescence longer and denser in the <?, 

 wings clouded, scutellar spines short and straight; abdomen 

 rather shining, deeply punctured, puncturation of the seg- 

 ments in the ? larger and more remote towards the 

 apex, basal segment laterally clothed with pale hairs, in 

 fresh examples of the c? the entire segment is so clothed, 

 second and following segments each with a narrow apical 

 band of pale adpressed hairs, fifth segment in the S without 

 lateral teeth at the apex, sixth with a narrow spiniforra 

 tooth on each side at the base, and with two apical pro- 

 cesses, each of which, regarded laterally is bidentate, the 

 upper tooth narrowly triangular, the lower longer and 

 spiniform, ? with the sixth segment dull, finely punctured, 

 carinated down the centre and near the apex laterally, 

 beneath with the second and following segments fringed 

 with pale hairs at the apex in both sexes, largely and deeply 

 punctured in the c?, the fourth segment narrowly emar- 

 ginate in the centre, with a slight tooth on each side of the 

 emargination, stipites of the armature straight, clothed 

 with long hairs, shorter than the sagittse, the apices of 

 which are broad and distant, fourth ventral segment in the 



