PROSOPIS. 191 



although some species are extremely local. Some occur 

 also in the north of England and in Ireland. I am not 

 prepared to say what flowers they prefer, for I have 

 never captured them on flowers, but they have been 

 found frequenting the Ragwort, and Curtis took a spe- 

 cies at Parley Heath, in Hampshire, on the Bluebell 

 (Campanula glomeratd). They form a remarkable in- 

 stance of an artisan bee, but so only in its habits, amongst 

 the Andrenides. 



Two submarginal cells to tJie wings. 



Genus 2. PROSOPIS, Fabricius. 



(Plate I. fig. 2 rf ? .) 

 MELITTA * b, Kirby. HYL^EUS, Latreille. 



Gen. Char. : HEAD transverse, flattish ; ocelli in an 

 open triangle on the vertex ; antennce geniculated, the 

 basal joint of the flagellum as long as the second, and 

 both subclavate, the rest of the joints short and equal ; 

 face flat, slightly protuberant between the insertion of 

 the antennae, and distinguished from the clypeus by a 

 suture ; clypeus transversely quadrate, slightly widening 

 gradually to the apex, marginate ; labrum transverse, 

 obovate, fringed with setse; mandibles broad at apex, 

 tridentate ; cibarial apparatus short ; tongue broad, sub- 

 emarginate and fringed with short hair ; paraglossce very 

 slightly longer than the tongue, their apex broadly 

 rounded and fringed with hair ; labial palpi as long as 

 the tongue, joints subequal, gradating in substance, sub- 

 clavate; labium about as long as the tongue, pyramidal 

 at its apical inosculation ; maxilla about as long as the 

 tongue, slightly lanceolate, fringed with short hair; 



