BEES OF GREAT BRITAIN. 191 



punctured ; the mandibles bidentate, ferruginous at their apex. 

 Thorax having a little hoary pubescence at the sides ; the 

 wings subhyaline and iridescent ; the legs have a slight scat- 

 tered hoary pubescence, the tarsi beneath fulvous, the claws 

 ferruginous ; the calcaria pale testaceous. Abdomen cylin- 

 dric, obtuse at the apex, densely clothed beneath with pale 

 yellow pubescence. B.M. 



Male. Length 2-2i lines. Closely resembling the female, but 

 the flagellum is filiform and longer than the head; the face 

 has a white pubescence ; the abdomen is incurved at the apex 

 and bidentate ; beneath, the second segment has an elevated 

 tubercle, and the fifth is concave and clothed with pale pubes- 

 cence. B.M. 



This species is rather local, but very abundant in many situa- 

 tions ; it frequents the Hare-bell (Campanula rotundi folia), and 

 may be captured in the flowers sometimes in plenty. 



Genus 11, HERIADES. 



Apis, pt., Linn. Faun. Suec. p. 419 (1761). 

 Hylaeus, pt., Fabr. Ent. Syst. ii. 302 (1793). 

 Anthophora, pt., Fabr. Syst. Piez. 372 (1804). 

 Heriades, pt., Spin. Ins. Lig. fasc. ii. 8 (1808). 

 Chelostoma, pt., Latr. Gen. Crust. Ins. iv. 161 (1809). 



The labial palpi four-jointed, the basal joint not quite half the 

 length of the second, the third and fourth joints minute, placed 

 at the side and near the apex of the second joint. The maxil- 

 lary palpi three-jointed, the two basal joints stout, the apical joint 

 cylindric, slender and pointed at the apex. The wings as in the 

 genus Chelostoma 



This genus only differs from Chelostoma in having two minute 

 apical joints to the labial palpi, which are placed near the apex 

 of the second joint at its side. Chelostoma has only one mi- 

 nute apical joint, the third being attached to the apex of the 

 second, and in a line with it ; in other respects they coincide. 

 Latreille says the maxillary palpi are two-jointed, and Mr. 

 Curtis has figured them so ; but this is a mistake, they are di- 

 stinctly three-jointed. Mr. Curtis has also figured the labial palpi 

 three-jointed, but they are really four-jointed; probably the 



