144 HYMENOPTERA ACULEATA. 



further known by the shape of the anterior femora ; these 

 are triangularly dilated externally, and armed with a sharp 

 curved spine near the centre of their inner margin, the 

 tibiae are testaceous, and the patellse greyish-brown, 

 radiately striate with whitish-yellow at the base, inner 

 claw of the tarsi produced into a wing-like appendage. 



L. lO-U mm. 



Chobham ; Woking. Rare ; burrows in bare sandy 

 patches on the commons. 



C. interruptus, Be G. {Lindenius, Shuck.). — Head and 

 thorax black, shortly hairy, the former closely and finely 

 punctured, clypeus clothed with silvery hairs, antennte 

 simple in the ^, 12-jointed, scape yellow, black behind in 

 the (J, posterior ocelli very distant, mandibles in the ? 

 yellow ; pronotal collar with two spots and the tubercles 

 yellow, mesonotum transversely striate in front, longi- 

 tudinally striate posteriorly and at the sides, scutellum with 

 a yellow spot in the ? , wings slightly smoky, propodeum 

 longitudinally rugose near the base, transversely near the 

 apex, with a central crenate sulcature ; abdomen black, all 

 the segments with lateral yellow spots, often united into 

 transverse yellow bands, fifth segment in the ? , and fifth, 

 sixth, and seventh in the S almost entirely yellow, basal seg- 

 ment hairy, apical dorsal valve in the ? narrowly acuminate, 

 largely punctured, clothed with bristly golden hairs at the 

 sides, in the J* with a deep central impression ; legs with 

 the femora black, yellow at the apex, and anteriorly in the 

 front legs of the (?, tibiEe yellow, anterior and intermediate 

 pairs with a black streak behind, tarsi yellow, dusky at the 

 apex, intermediate metatarsi in the cJ produced on their 

 anterior side. 



L. 12-15 mm. 



Rare. Mr. Bignell has bred it from decaying wood. 

 Darenth ; Southgate ; Ripley; Bristol; (Smith). Oxford; 

 (jf?. C. L. Perkins). Gloucestej-shire ; {V. R. PerJdns). 

 Devonport; {Bignell). St. Mary Clist ; (Parftt). York- 



