236 HYMENOPTERA ACULEATA. 



with brown, scopa golden, posterior tibiae clear testaceous 

 in the ? , testaceous towards the apex only, in the $ . 



L. 13-15 mm. 



A common early spring species, occurring on Sallows, 

 Dandelions, &c. Very subject to the attacks of Htyloys. 

 I have an example with four parasites in it. 



A. bimaculata, Kirh. (Second brood = (^ecoratoj Smith, 

 vitrea, Smith, eonjwncta, Smith, jjrsstexia, Smith ?) Very like 

 tibialis but darker and rather smaller in both sexes, and 

 with the legs entirely black ; in the S the antennse are 

 rather shorter and more slender, the puncturation is finer, 

 and the apical impressions of the abdominal segments are 

 more shining and often almost impuuctate, and the second 

 segment beneath has sometimes a reddish spot on each 

 side, the armature is much smaller, and the legs are rather 

 more slender; the ? has the face clothed with brown hairs, 

 the underside of the thorax, and the femora with pale 

 brown, not white, hairs, floccus and scopse pale brownish ; 

 abdomen more finely punctured than in tihialis, and with 

 the impressed apices of the segments often nearly im- 

 puuctate, basal segment often, and the second rarely, more 

 or less red towards the apex, and second segment beneath 

 generally with a red spot on each side. 



L. 12-14 mm. 



Not common. Occurs in early spring on Sallows, and 

 in July and August on Briars, &c. ; is rarely stylopized. 

 Woking ; Chobham, both broods ; Bournemouth, autumn 

 brood. Norwich, both broods; {Bridgman). Lowestoft, 

 autumn ; {Morice). Tavistock, spring ; (Swale). Bury 

 St. Edmund's, spring; (Tuck). Colchester; (Harwood). 

 Shirley, Windsor, Sidmouth, autumn ; (Smith). The 

 olathrate basal area of the propodeum at once distinguishes 

 this species from any other similarly coloured, except 

 tibialis. Prwtcxta Smith is a very curious insect with 

 fulvous anal fimbria, and suggests to my mind a cross 

 between this species and inliiies. 



