Iiecor(h ij lires. 'I'll 



Omnia liynaria lit/nan'el/a, .suhsp. n. 

 O^mi.i lif/ndiia, vfir. », Ckll. Ann. & Mii-r. N. Hist., May 1000, p. 409. 



Komcrovillc aiul Las Vefjas, New Mexico. 



I liavc l)ccn surprised to find that the sprcies of thisp;rou|) 

 which I have recently obtained in Colorado (viz. at Hallway 

 House, Pike's Peak, May '^0, at flowers of Sa/i.r; at Ward, 

 9()(K) ft., July, at flowers of Phucelia circinata ; and at 

 Boulder, June VI, taken by my wife; all females) is not 

 O. liynaria but the Pacific region O. pi'ojiiii'jnii, Cressou. 



Osmia hesperclla, sp. u. 



? .— Lenirth 8]-9.\ mm. 



Head and thorax very densely punctured, ilark (slightly 

 greenish) blue ; abdomen shining dark blue, not at all 

 greenish ; pubescence, including ventral scopa, white; head 

 rather large, the cheeks broad ; autenme black ; anterior 

 edge of cl\pcus straight and siuii)le ; mandibles i-deutate, 

 the two apical teeth large, the two inner ones small, and 

 consisting of what is in reality a single broad bicuspidate 

 tooth; no tubercles on front; teguhe dark blue in front, 

 pieeous behind. Wings somewhat dusky, first r. n. twice as 

 far from base of second s.ni. as second r. n. is from its apex ; 

 b. n. meeting t.-m. (or falling a little short of itj : middle 

 and hind femora and tibije more or less blue, the hind 

 femora in front a splendid purple-blue; abdomen well- 

 punctured. 



Closely allied to 0. a^biventris, Cresson, of which it 

 may be considered a western representative ; a/biveniris is 

 smaller, with the alxlomcn not so blue and the legs entirely 

 black. (J. puniila is also allied. 



Hub. Boulder, Colorado, June 12, 1905, 2 ? [JV. P. 

 Cockerel/). 



The apical joint of the maxillary j)alpus is very slender, 

 strongly contrasting with the penultimate one, which is much 

 thickened at end. 



Osniia (jaillardi(C, sp. n. 



$ . — Length about 11.', mm. 



Dark blue-green, the sides of thorax and most of clypeus 

 black ; sides of face yclloMcr green ; hair of face and vertex 

 partly black and partly white; of cheeks black; of pleura 

 black; of thorax above long and white, with long black 

 hairs sparsely intermixed ; tuft behind wings white ; 

 punctures of cly[)cus and mcsoihorax excessively dense ; 



