APID^. 34S 



genus it associates ; the present position therefore seems 

 to be its natural one ; labial palpi four-jointed, the second 

 joint not half so long as the first, paraglossaj each pro- 

 duced at the apex into a long filiform process, not quite so 

 long as the labial palpi, maxillas very long and narrow, 

 subparallel sided, their palpi five-jointed ; an unusual 

 character exists in this genus, at the side of each upper 

 sclerite of the hypopharynx near the base, the investing 

 membrane is chitinized into a dark plate, and at the base 

 of the maxillaj on the membrane are two long, dark, 

 chitinous plates which, I believe, repi-esent the basal 

 scales ; the labriim is trapeziform, narrower in front, wings 

 with three submarginal cells, scutellum bidentate, abdo- 

 men usually with white pubescent spots, rather pointed, 

 six ventral segments exposed in the $ , seventh composed 

 of two elongate, convergent, almost separate plates, which 

 unite at the apex, eighth subtriangular, armature stout, 

 cardo short ; ? without pollinigerous organs. A genus 

 of inquiline bees, which have all a great general similarity 

 and associate with AnUwpliora ; it is of small extent, most 

 of its species being palajarctic, but Smith in 1876 says that 

 four occur in Chili. We have only two in this country. 



1. Pubescence of head and thorax ashy grey, lateral 



spots of the third and fourth abdominal segments 



large and quadrate ...... lttctuosa. 



2. Pubescence of bead and thorax brownish or greenish 



grey, spots of the third and fourth segments 



small and punctiform ...... armata. 



M. luctuosa, Scof. — Black, head and thorax rugosely 

 punctured, vertex clothed with greyish white hairs, inter- 

 mixed with black, face just above the antennas clothed with 

 greyish white hairs in both sexes, below the antenna) in 

 the (J with white hairs bordered at the sides with black, 

 in the ? with black, with only a patch of snow-white 

 hairs at the base of the clypeus ; antennae with the basal 

 joint densely clothed with long white hairs in the $ , with 

 shorter black ones, intermixed with white, in the ?; thora.K 



