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 Eagwort, and Curtis took a spe¬ 
cies at Parley Heath, in Hampshire, on the Bluebell 
(■Campanula ylomerata). They form a remarkable in¬ 
stance of an artisan bee, but so only in its habits, amongst 
the Andrenides. 
Two submarginal cells to the wings. 
Genus 2. PROSOPIS, Fabricius. 
(Plate I. fig. 2 S ? •) 
Melitta # b, Kirby.— HYLiEus, Latreille. 
Gen. Char. : Head transverse, flattish ; ocelli in an 
open triangle on the vertex; antenna gcniculated, 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 setae; mandibles broad at apex, 
tridentate; cibarial apparatus short; tongue broad, sub- 
emarginate and fringed with short hair ; paraylossa 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; 
