34 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



dibles not elongate; clypeus moderately shining, with weak punc- 

 tures; front dull. Antennae long and slender, flagellum dark brown 

 beneath. Third antennal joint shorter than fourth; fifth about as 

 long as fourth. Mesothorax dull, scutellum shining in front. Area 

 of metathorax granular, rather large. Tegulae dark brown; wings 

 reddish hyaline; nervures and the large stigma rather dark amber. 

 Basal nervure falling short of transverse median. Second submar- 

 ginal cell receiving first recurrent nervure in middle. Third sub- 

 marginal short. Hair on inner side of hind tarsi creamy white. 

 Abdomen shining, without evident punctures, thinly hairy, with 

 indications of bands at sides of segments; hind margins of segments 

 dark reddish. Second segment in middle depressed not quite one- 

 third. Apical plate emarginate. 



Type— Cat, No. 18146, U.SJST.M. 



The following is taken from the key : 



Pubescence of head mostly black; abdomen bluish 1 



Pubscence of bead not mostly black 3 



1. Abdomen seemingly impunctate < 2 



Abdomen distinctly punctate mimetica. 



2. Hardly any pale hair on face Candida. 



Considerable pale hair on face nigrocaerulea. 



3. Pubescence of head partly black 4 



Pubescence of head all pale trizonala, etc. 



4. Antennae black or blackish; abdomen bluish to greenish cerasifolii. 



Antennae partly pale candidiformis. 



6 42 . Fourth antennal joint not longer than broad; hair of face ochreous; basal nervure 

 meeting transverse median, or falling a little short of it. 



ANDRENA FERNALDIELLA, new species. 



Florissant, Colorado. June 2, 1907. At flowers of Salix brachy- 

 carpa. (S. A. E-ohwer.) 



Male. — Length, 7i mm. Black, with pale ochreous hair. Head 

 very broad. Process of labrum broadly truncate. Clypeus shining, 

 finely punctured, covered with long hair. Front dull and flattened. 

 Cheeks broad but not angled. Antennae very long; flagellum obscure 

 brown beneath. Third antennal joint a little longer than fourth, 

 but hardly as long as fifth. Mesothorax and scutellum dull and 

 granular. Area of metathorax with very feeble ridges, producing 

 a sort of rugosity. Tegulae rufopiceous. Wings hyaline, nervures 

 and stigma amber color. Basal nervure meeting transverse median. 

 Second submarginal cell receiving first recurrent nervure beyond 

 middle. Tarsi entirely dark. Abdomen shining, not punctured; 

 hind margins of segments somewhat reddish; second segment in 

 middle depressed scarcely one-third; second and following segments 

 with loose weak hair bands. Apical plate truncate. 



(A. femaldieUa and candidiformis are practically the same except as 

 to the fourth antennal joint. By the antennal characters the male 



