Records of Dees. 123 



Osmia Ed, 



nie. 



sp. n. 



? . — Lengtli about 7 mm. 



Very brilliant golden-greeiij a little reddish on second 

 abdominal segment; hair of head and thorax above long, pale 

 ochraceous, with no dark hairs intermixed ; on clypeus the 

 hair is yellowish white ; flagellum ferruginous beneath, not 

 moniliform ; mesothorax densely rugoso-punctate ; tegulaj 

 brilliant green. Wings dusky hyaline. Legs green, with 

 yellowish-white hair ; hind femora almost black behind. 

 Abdomen subglbbose, with the hair entirely imle yellowish or 

 yelloto'isli lohite ; sixth segment with a minute feeble notch ; 

 seventh strongly notched rather than bidentate. 



IJah. Campus of University of Colorado, Boulder, Colorado, 

 at flowers of laraxacum taraxacum^ May 9, 1U07 [Miss Edna 

 Baker) . 



The following table separates this species from some other 

 bright green males : — ■ 



Posterior part of abdomen dorsally with some or 

 mucli black hair ; size larger 1. 



Posterior part of abdomen dorsally with wliolly light 

 hair ; size smaller 2. 



1. Hair of thorax above with some dark hairs inter- 



mixed bel/a, Cresson. 



Hair of thorax above without dark hairs intermixed. Bennetta;, Ckll. 



2. Size smaller; pubescence white; abdomen dullish, 



not shining golden yaudiosa, Ckll. 



Size larger ; pubescence very yellow ; abdomen 



brilhant, shining golden Educe, Ckll. 



Osmia leonis, sp. n. 



? . — Length about 11^ mm. 



Head and thorax partly dark green, partly black ; abdomen 

 shining dark blue ; legs black ; ventral scopa black ; cheeks 

 normal. Head ordinary, with large strong punctures ; man- 

 dibles tridentate, the apical tooth long and falciform, llie 

 second triangular and sharp, the third a long undulating 

 ridge ; anterior part of clypeus })urplc-black, this colour 

 extending also up the middle ; etlge of clypeus straight, but 

 at the middle next to the edge there is a transversely oval 

 shining jnt of quite large size ; supraclypeal region with a 

 shining green mark like an inverted V ; antenna3 entirely 

 black, comparatively short. Hair of cly})eus, lower sides of 

 face, and cheeks black ; of front black and i)alc ochreous 

 mixed ; of vertex mostly black, but of occiput |)ale ochreous, 

 extending forward over ocelli j hair of pleura black, but of 



