553 



5. Thorax above and basal tergite of abdomen with whitish to ochreous 



pubescence, sometimes with dark hair intermixed on the thorax; 

 ventral scopa comparatively dense 6 



Thorax above and basal tergite of abdomen with dense, mostly 

 short and appressed pubescence of a deep, bright fulvous color; 

 ventral scopa thin. M. schauinslandi Alfken 



6. Venter of abdomen without white apical hair-bands 7 



Venter with narrow white apical hair-bands beneath and distinct 



from the scopa S 



7. Ventral scopa bright fulvous in color; pubescence on thorax ochreous, 



becoming griseous on the sides of the mesoseutum; abdomen with 

 narrow, fulvous apical hair-bands on tergites 2 to 5. 



M. diligcns Smith 



Ventral scopa very pale fulvous to pale ochreous; pubescence on 

 disk of thorax sparse, short and erect, whitish on the sides, but 

 much intermixed with blackish hairs medially, the disk also with 

 very fine, pale appressed hairs ; abdomen with narrow, white 

 apical hair-bands on tergites 2 to 5 and an apical white fringe 

 on the first tergite .M. palmarum Perkins 



8. Ventral scopa rather bright fulvous changing anteriorly to creamy 



white on the second ventrite; pubescence of face and thorax 

 white, on the disk of the mesoseutum sparse and short with some 

 brownish hairs intermixed, and also a few appressed white scale- 

 like hairs anteriorly on the mesoseutum and along the anterior 

 and posterior margins of the scutellum; abdomen with narrow, 

 white apical hair-bands on the first five tergites. 



M. fullaumyi Cockerell 



Ventral scopa creamy white to pale ochreous; pubescence of face 

 and thorax ochreous or in part yellowish, the disk of the mesos- 

 eutum in perfect specimens almost concealed by short, appressed 

 scale-like ochreous hair, with longer, erect and brownish hairs 

 intermixed, first five tergites of abdomen with narrow, apical hair- 

 bands pale ochreous to creamy white, the last band generally 

 whiter than those preceding M. timberlakei Cockerell 



Megachile schauinslandi Alfken. 



Alfken, Entom. Nachr., 24, p. 340, 1898. 



An abundant species, and may be seen in large numbers 

 visiting the flowers of the Mexican creeper, Antigonon leptopus, 

 and less frequently the flower of Bidcns pUosa, Citrus and prob- 



