1 448 Insects. 



band, the apical segment compressed, with a deep transverse fovea on 

 each side ; beneath, a longish fringe of white hairs on the margin of 

 the first and second segment, the apical segment deeply concave. 



This species has hitherto been rare in cabinets ; there is a specimen 

 of each sex in the Kirbyan cabinet, taken by Mr. Trimmer near Ham- 

 mersmith, where I have myself frequently searched for it but without 

 success : it no doubt, like its congener, nidificates in decaying posts 

 and rails, and therefore whole colonies will be destroyed occasionally 

 when such are replaced by sound timber. I detected three specimens 

 of the female amongst a mass of unarranged bees in the possession of 

 Mr. Ingall, and one I obtained from a collector, captured in Hainault 

 Forest : I have not met with the species myself. The other species, the 

 H. Campanularum, is abundant in many situations ; I have met with 

 large colonies in posts, rails, &c. ; it is also to be met with, as Mr. 

 Kirby observes, in the flowers of various species of Campanula. 



Sp. 2. Heriades Campanularum. 



Female. — Length 2j— -2j lines. Black, thickly and finely punc- 

 tured ; the mandibles bidentate, ferruginous at the apex ; the antennae 

 clavate ; the thorax has a slight hoary pubescence at the sides ; the 

 wings slightly fuscous ; the abdomen cylindric, the apical segment 

 very finely and thinly clothed with pale hair ; beneath densely clothed 

 with pale yellow hair. 



Male. — Length 2 — 2j lines. The antennae filiform ; the face be- 

 low the antennae clothed with pale yellow hair ; the thorax has a thin 

 scattered pale pubescence, and the wings are slightly fuscous ; the ab- 

 domen in flexed, acutely bidentate at the apex ; beneath, the second 

 segment is elevated into a tubercle, and the fifth is deeply concave 

 and clothed with pale hair. 



Genus. — Ceratina, Latreille, St. Fargeau. 



Apis, Linnaeus, Kirby. Megilla, Fabricius. Pithitis, Klug. 



Clavicera, Walcknaer. 



Body elongate : antennae subclavate : maxillary palpi 6-jointed ; 

 labial palpi 2- join ted : fore-wings with three sub-marginal cells. 

 Only one species of this genus has been discovered in Britain. 



Sp. 1. Ceratina c^erulea, Latreille. 

 Female. — Length 2 J — 3|- lines. Shining blue or blue-green, 



