56 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



ANDRENA COLORADINA, variety A. 



Fort Collins, Colorado. May 8, 1903. (Gillette.) 



Female. — Length, 8 mm. Black, small joints of tarsi ferruginous; 

 the hind margins of the abdominal segments dark reddish. Pubes- 

 cence white, except on thorax above, where it is pale ocherous, and 

 pale reddish at end of abdomen. Facial quadrangle broader than 

 long. Process of labrum narrow and rounded at end. Clypeus 

 shining, with numerous punctures. Facial foveae seen from above 

 white, moderately broad, ending below a little below level of top of 

 clypeus. Flagellum dull reddish beneath. Third antenna! joint 

 shorter than next three together, fourth joint very short. Meso- 

 thorax and scutellum dullish, without evident punctures. Area of 

 metathorax granular. Tegulae dark reddish. Wings clear hyaline; 

 nervures and stigma amber color. The type-specimen has the second 

 transverse cubital wanting on one side. Basal nervure meeting 

 transverse median. Second submarginal cell receiving first recur- 

 rent nervure in middle. Hair on hind tibiae and on inner side of hind 

 tarsi shining white. Abdomen moderately shining, not punctured, 

 interrupted white hair bands rather poorly developed on segments 

 2 and 3 and an entire one on fourth. 



A.fragiliformis Cockerell is a little larger, with orange- tinted wings, 

 rough and dull mesothorax, and narrower facial foveae. It is quite 

 distinct. 



Paratope.— Cat. No. 18162, U.S.N.M. 



6 82 . Larger species, much more than 8 mm. long. 



a 84 . Abdomen very finely punctured, with a faint greenish tint; facial foveae rather 

 narrow; second submarginal cell receiving first recurrent nervure at middle. 



ANDRENA ANTONITONIS, new species. 



Antonito, Colorado. August 5, 1899. (Gillette.) 

 Female. — Length, 10 mm. Black, rather slender; the front faintly 

 greenish. Pubescence grayish white. Facial quadrangle broader 

 than long. Process of labrum narrowly truncate. Clypeus shining, 

 with sparse small punctures and an indistinct median ridge. Facial 

 foveae seen from above brownish white, occupying about half distance 

 between eye and antenna; seen from the side the foveae appear dark 

 brown; they extend scarcely narrowed just below level of antennae 

 and are very narrowly separated from eye. Flagellum obscure 

 brownish beneath. Third antennal joint as long as next two com- 

 bined. Mesothorax dull in front, shining posteriorly, with scattered 

 small punctures. Scutellum shining. Area of metathorax granular. 

 Tegulae ferruginous, with a fuscous spot. Wings reddish hyaline, 

 nervures and the rather small stigma ferruginous. Basal nervure 

 just falling short of transverse median. The very broad second sub- 



