NO. 1897. BEES OF THE GENV8 OSMIA—COCKERELL. 219 



conjuncta Cresson, 1864. Connecticut (E. Norton). 

 Punctures of female alxlomen much stronger a;i(l less dense than in 0. alhiventris. 

 Ventral scopa white, 

 coniunctoides Robertson, 1893. Citrus County, Florida (Robertson). 

 Male resembles conjuncla, having the same two tubercles, one above the other, on 

 front; but lateral teeth of sixth segment broad and obtuse and produced down- 

 wards (acute in conjuncta). 

 copelandica Cockerell, 1908. Copeland Park, Colorado (Rohwer). 

 Small black species ^vith white scopa; abdomen hlightly metallic. It is not unlike 

 0. abjecta, but smaller, and easily 8ej)arated l)y the scopa, which in abjccia is 

 reddish-black. There is a superficial reseml)lance to 0. insularis Schmkn. 

 from Mallorca. 

 cordata Robertson, 1902. Illinois (Robertson). Tab. 4. 

 "May be the male of 0. brevis" (Robertson), but later Robertson found the female, 

 which proves it to be quite distinct, the ventral scopa being yelkiwi h. The 

 male has the first ventral segment of abdomen emarginate. 

 cressonii Dalla Torre, 1896. 

 Same as conjuncta; the name was proposed by Dalla Torre for qvxjdridentata Cresson, 

 not of Duni6ril, 1860. Dum6ril's insect was described under Phyllotoma, and 

 appears to be of doubtful identity. 

 *cyanella Cockerell, 1897. Olympia, Washington State, May (Kincaid). 

 Female about 9 mm. long, very broad, with large subquadrate head. 

 Type.— Cat. No. 6364, U.S.N.M. 



* cyaneonitens Cockerell, 1906. Florissant, Colorado (Rohwer). Tab. 1, 2. 

 A new locality is Durango, Colorado, June 7, 1898 (Oslar). 



* davidsoniella Cockerell, 1905. Los Angeles, California (Davidson). 

 Male steel-blue, a little over 8 mm. long; antennae black. 

 Type.—U479, U.S.N.M. 



*densa Cresson, 1864. Pikes Peak, Colorado. Tab. 1,5. 



The color of the female abdomen resembles that of hendersoni; but hair of pleura is 

 white (black in hendersoni). 



Additional details: Univ. of Colorado Studies, vol. 5 (1907), p. 38. 

 *distiiicta Cresson, 1864. Connecticut (E. Norton). 



Ventral scopa white; female broader and more robust than albiventris or conjuncta. 



* dubia Cresson, 1864. Pikes Peak, Colorado. 

 Resembles 0. atriventris. Ventral scopa black. 



The fossil "Osmia" dubia Germar 1849, was described as Apiaria dubia, and the 

 reference to Osmia by Giebel (1856) is probably erroneous. Hence I think Cres- 

 son's name for our species may remain. 

 ednse Cockerell, 1907. Boulder, Colorado, May (Edna Baker). Tab. 3. 

 enena Cockerell, 1907. Florissant, Colorado, June 23 (Rohwer). 

 Male resembles 0. mertensise, but antennaj longer, legs not metallic, abdomen nar- 

 rower and less shining, etc. 

 eutrichosa Cockerell, 1910. Steamboat Springs, Colorado (Cockerell). 



^fale with no Idack hair anywhere, 

 exigua Cresson, 1878. California (Henry Edwards). 

 Vei-y small. "This is our smallest species" (Cresson, 1878). 



Titus refers this to Nothosmia, and states that Ueriadcs glaucum Fowler is a synonym. 

 *faceta Cresson, 1878. "Can., N. Y., Ga." Tab. 5. 

 Allied to 0. chalybea. 



Additional details; Proc. Acad. Nat. Sci. Phila., 1897, p. 346. 

 Ventral scopa black, but white hair on latei-al margins of abdomen. Fedor, Texas 



(Birkmann). 

 Kerrville, Texas, at flowers of Marrubium vulgare, Apr, 12, 1907 (F. C. Pratt). 



