University Studies 



Vol. XIV JANUARY 1914 No. i 



I._STUDIES OF NORTH AMERICAN BEES 

 II. Family Stelididae 



BY MYRON HARMON SWENK 



The present paper is the second of the series proposed in a 

 previous contribution on the family Nomadidae (antea, XII, pp. 

 1-113), and aims to tabulate and list the bees of the family 

 Stelididae occurring in Nebraska, together with annotations con- 

 cerning their distribution, comparative abundance and season of 

 flight. As in the previous study, records and descriptions of 

 specimens from outside Nebraska before the writer are included 

 where these seem to add anything to our knowledge of the species 

 concerned. 



MATERIAL 



In the studies upon which this paper is based over four hundred 

 specimens have been examined and determined. From the state 

 of Nebraska fifteen species and subspecies are recorded, and of 

 these three species are apparently new. From outside the state 

 seven species and three subspecies are described as new, making 

 a total of thirteen new forms here described as new. 



CLASSIFICATION OF STELIDIDAE 



The family Stelididae is here used in the sense proposed by 

 Robertson {Canadian Entomologist, XXXVI, p. 37 and p. 40). 

 but only the subfamilies Stelidinae (= Anthidiinae Robertson, 

 part) and Anthidiinae are represented within our limits. The 

 group is the same as Ashmead's subfamily Stelidinae of his family 



