28 Mr. T. D. A. Cockerell on Bees. 



brownisli feniiginous, nervuves dark brown ; second sub- 

 marginal cell very little broader above than third ; basal 

 nervure passing* a short distance basad of transverso-medial ; 

 abdomen shining, impuuctate, thinly hairy, with longer hair 

 on first two segments, li elated to A. bipunctata, Cress., and 

 A. trevorift, Ckll., but very distinct. 



Bab. Maniton, Colorado, 6630 feet, April 28, 1£04, at 

 flowers of Ilibes leptanthum. Collected by T. 1). A. and 

 W. P. Cockerell. 



Mr. Viereck writes: — " Represented in coll. Am. Ent. Soc. 

 by 3 ? and 4 (^ from Nevada : the ? is covered all over 

 with brown pubescence and has a variable yellow spot on the 

 clypeus ; this yellow spot is only faintly indicated in one 

 specimen.''^ *] he species belongs to a group consisting of 

 A. leptanihi, A. Porterce, and a new species from New Jersey 

 and Connecticut which will be published by Mr. Viereck. 



Andrena Porterce, Ckll. 



This black species is new to Colorado. Maniton, April 28, 

 at flowers of Eibes lejdanthum, 2 ? ; Cheyenne Caiion, Colo., 

 at Ribes leptanthum^ May 11, 1 $ collected by Miss Winifred 

 ]\1. Shumway ; Roswell, Colo., at Pdbes longifiorum^ May 14, 

 1 ? collected by W. P. Cockerell. 



Andrena erythrogastra (Ashmead). 



Colorado Springs, Colo., at female flowers of Salix, May 10, 

 1 ? ( W. P. CockereU) ; Prospect Lake, Colorado Springs, 

 at Salix, May 22 (T. cL- W. Ckll.). 



Nomada suavis, Cresson. 

 Palo Alto, California, Aug. 16, 1895 (F. L. Kellogcj). 



Nomada ultima, Ckll. 



Palo Alto, California, April 6, 1892 ( V. L. Kellogg) . New 

 to California. 



Nomada fragilis, Cresson. 



Halfway House, Pike's Peak, Colorado, about 8900 feet, 

 at flowers of Salix, May 30, 1 c^ {Cocktrell). 



Nomada Frieseana, sp. n. 



$ . — Length about 9 mm. 

 Just like N. rubicunda of the Atlantic seaboard, except for 



