no. 2064. BEES OF GENUS ANDRENA—VIERECK AND COCKERELL. 5 



creamy white; hair on inner side of hind tarsi light red brown. Ab- 

 domen shining, sparsely punctured, without hair bands, second 

 segment in middle depressed more than half, but feebly. Hair at 

 apex pale, but suffused with golden. 



Female. — Clear Creek, Colorado. (Baker, 5836.) 



Differs from Kansas type as follows: Flagellum without any red 

 band or stripe beneath. Third antennal joint considerably longer 

 and more slender, though not as long as the next three joints com- 

 bined. Area of metathorax more irregularly wrinkled. Sides of 

 meso thorax posteriorly more sparsely punctured. Basal nervure 

 falling short of transverse median. First abdominal segment more 

 strongly punctured. Hind tibiae and base of tarsi quite dark, not 

 clear ferruginous. 



(I believe this Colorado A. submarine to be the female of A. mar- 

 tialis, and probably specifically distinct from the Kansas type.) 



Paratype.— Cat. No. 18137, U.S.N.M. 



b 6 . Males; mesothorax dull; second abdominal segment in middle depressed about 

 half, the edge of the depression little curved. (The difference between this 

 and A. submariae in respect to the depression of second segment is sexual, as 

 proved by the sexes of A. sphecodina taken together.) Second submarginal 

 cell very narrow. 



A. martialis is probably a subspecies of A. sphecodina. The males concerned 

 may be separated thus : 



Head narrow; basal nervure meeting transverse median; first abdominal seg- 

 ment with very small punctures sphecodiniformis. 



Head broad; basal nervure falling short of transverse median; first abdominal 

 segment distinctly punctured martialis. 



Very close to martialis, but area of metathorax seems duller and not so heavily 

 ridged sphecodina 



A. martialis can not be separated from sphecodiniformis on the character of 

 abdominal fasciation. 



ANDRENA MARTIALIS, new species. 



Boulder, Colorado. March 25. (G. M. Hite.) 



Male. — Length, 7 J mm. Black, with the apical third of the first 

 abdominal segment and nearly all of the second and third bright 

 ferruginous. The second and third with a transverse blackish shade 

 at base and the third more or less blackened apically. Small joints 

 of tarsi brownish. Pubescence grayish white. Facial quadrangle 

 broader than long. Process of labrum truncate. Clypeus finely but 

 closely punctured, with a delicate median ridge. Antennae dark, but 

 joints 3 to 6 more or less red beneath; third joint a little shorter than 

 fourth. Cheeks normal. Mesothorax and scutellum dullish, with 

 strong but not large punctures. Area of metathorax triangular, with 

 strong irregular ridges. Tegulae dark reddish. Wings reddish 

 hyaline. Stigma and nervures ferruginous. Basal nervure almost 

 meeting transverse median. Second submarginal cell very narrow, 



