200 
BRITISH BEES. 
Genus 4. ANDRENA, Fabricius. 
(Plates II. and III.) 
Melitta c, Kirby. 
Gen. Char. : Head transverse, as wide as the thorax ; 
ocelli in a triangle on the vertex ; antennae filiform, geni- 
culated, the basal joint of the flagellum the longest; face 
flat; clypeus convex, transverse, quadrate,slightly rounded 
in front; labrum transverse, oblong; mandibles bidentate; 
tongue moderately long, lanceolate, fringed with fine 
hair ; paraglossae half the length of the tongue, abruptly 
terminated and setose at the extremity; labium about 
half the length of the entire apparatus, its inosculation 
acute; labial palpi inserted above it, below the origin of 
the paraglossae in a sinus upon the sides of the tongue; 
maxillae irregularly lanceolate; maxillary palpi six- 
jointed, longer than the maxillae, the basal joint about 
as long as the fourth, but more robust, the second joint 
the longest, the rest declining in length and substance. 
Thorax ovate; prothorax not distinct; mesothorax 
quadrate; bosses protuberant; scutellum lunate; post- 
scutellum lunulate; metatliorax gibbous, and pubescent 
laterally; wings with three submarginal cells, and a 
fourth slightly commenced, the second quadrate, and 
with the third receiving a recurrent nervure about their 
middle; legs densely pubescent, especially externally, 
and particularly the posterior pair, which have a long 
curled lock upon the trochanter beneath, the anterior 
upper surface of the femora clothed with long loose hair, 
which equally surrounds the whole of the tibiae, but which 
is less long upon their plantae, the claws strongly bifid. 
Abdomen ovate, a dense fringe edging the fifth segment, 
