24 PROCEEDIXGS OF THE XATIOXAL MUSEUM. tol. 48. 



above so much as in J., laramiensis, and the hah' of the thorax is much 

 paler. (After close study, I can only consider this a variation of 

 laramiensis. In the key it is separated on the proportions of the 

 antennal joints.) 



b 24 . Abdomen black; first recurrent nervure joins second submarginal cell before 

 middle. 



ANDRENA TETONORUM, new species. 



Sioux County, Nebraska. May. (L. Bruner.) 



Male. — Length, 9 mm. Black, small joints of the tarsi reddish, 

 clypeus except lower edge and two black spots and narrow lanceolate 

 lateral marks close to sides of clypeus but only touching at lower end, 

 creamy white. Head broad; process of labrum emarginate; clypeus 

 shining, with strong but not dense punctures; front and vertex dull; 

 cheeks normal; nagellum obscurely brownish beneath except at base. 

 Third antennal joint about twice as long as fourth; fifth only about 

 as long as fourth. Head and thorax with abundant long creamy 

 white hair. Mesothorax dull, with small punctures; scuteUum shin- 

 ing anteriorly; area of metathorax granular, denned by absence of 

 hair. Tegulae dark red-brown. Wings reddish hyaline, stigma and 

 nervures amber color, the nervures on basal part of the wing becom- 

 ing fuscous; stigma rather small. Basal nervure meeting transverse 

 median. First recurrent nervure joining second submarginal cell 

 before middle. Third submarginal rather short. Spurs cream color. 

 Abdomen shining, without evident punctures; hind margins of the 

 segments with thin white hair bands, that on first very feeble. Hah' 

 on under side of apical half of abdomen yellowish. 



(The form next described is in my opinion conspecific with A. 

 tetonorum, though it is smaller, and is separated in the key on the 

 proportions of the antennal joints.) A. tetonorum falls in the key 

 close to A. cressoni Icansens-is, from which it is separated by the 

 indistinctly punctured abdomen. 



ANDRENA TETONORUM, variety A. 



Sioux County, Nebraska. (L. Bruner.) 



Male. — Length, 8 J mm. The rather short antennae and dense 

 orange hair at apex of abdomen make it look like a female. Black, 

 the small joints of tarn ferruginous. Clypeus, except two spots on 

 lower edge and very small elongate lateral marks close to sides of 

 clypeus, cream color. Pubescence light ocherous. Head ordinary, 

 facial quadrangle broader than long. Process of labrum emarginate. 

 Clypeus sparsely and feebly punctured, more strongly at sides. Fla- 

 gellum very dark reddish beneath. Third antennal joint long, fully 

 as long as the next two joints together, but the fifth is quite short. 

 Mesothorax dull, feebly punctured; scuteHuni shining in front; area 

 of metathorax dull and granular. Tegulae piceous with pallid mar- 



