MEGACHILE. 
269 
Subsection 3. Dasygasters (convey pollen on the belly). 
All with two submarginal cells to the icings. 
Genus 19. MeG-ACIIILE, Latreille. (Leaf-cutters.) 
Ahs c 2 a, Kirby. 
(Plate XII. fig. 2 and 3 c??.) 
Gen. Char. : Head as wide as the thorax, flat and 
broad on the vertex, where, on the anterior edge, the 
ocelli are disposed in a triangle; antennae shortish, fili¬ 
form, geniculated ; scape about as long as two first joints 
of flagellum, which increases both in length of joints and 
their substance from base to apex, the terminal one 
being the longest, and longitudinally compressed ; face 
and clypeus very pubescent, concealing their divisions; 
clypeus transversely lunulate, scarcely convex; labrum 
longitudinally slightly convex and oblong, with the sides 
parallel; mandibles broad, widening outwardly, irregu¬ 
larly quadridental, the two inner teeth obtuse; cibaricd 
apparatus moderately long; tongue more than twice the 
length of the labium, tapering from the base to the apex, 
where it terminates in a minute knob; paraglossce very 
short, scarcely one-sixth the length of the tongue, co- 
adunate at the base and acuminate at the apex, where, 
in repose, they lap round the base of the tongue; labial 
palpi three-fourths the length of the tongue, the two 
basal joints long, subequal, membranous, linear, slightly 
tapering to the acute apex of the second, where the third 
subclavate joint articulates just before its termination, 
and conterminous with which is the fourth, shorter than 
the third, but also subclavate; labium not quite half the 
length of the tongue, with a long subobtuse process in 
the centre of its inosculation; maxillae subhastate, and 
