36 Myron Harmon Szvenk 



the bands of tergites 1-4, and the non-carinate pygidium ; the 

 female may be separated by the whitish color of the clypeus and 

 lateral face marks and the presence of four yellow spots on the 

 mesoscutellum instead of only two. D. chippeivaense also visits 

 Rudbeckia hirta. From D. harbecki Crawford, zehratum differs 

 in the lack of yellow lines on the disk and sides of mesoscutum 

 and on pleura, the complete band on tergite i, the mostly dark 

 tibiae, the shorter lateral face marks, etc. From D. dor sale (Lep- 

 eletier), it differs in the mostly black cheeks, wholly black scape, 

 lack of reddish on the anterior and lateral margins of the mesos- 

 cutum and on mesoscutellum, etc. From D. larreae Ckll., it may 

 be told at a glance by the mostly black cheeks and vertex. 



SPECIES FROM OUTSIDE NEBRASKA 

 Dianthidium (Heteranthidium) occidentale Cresson. 



1868. Anthidium occidentale Cresson, Trans. Am. Ent. Soc., I, pp. 386- 



387, ? c?. 

 1900. Anthidium occidentale Cockerell, Ann. Mag. Nat. Hist., XI, p. 



414, $ c?. 

 1907. Anthidium occidentale Cockerell, Univ. of Colorado Studies, IV, 

 pp. 249-259, $ c^. 



This species was described from eight cotypes, four of each sex, 

 collected in New Mexico by Dr. Samuel Lewis, and was also re- 

 corded from Colorado. Later, Cockerell recorded the capture 

 of both sexes at Sapello canyon and San Ignacio, New Mexico, 

 and still later at Boulder, Colorado. Before the writer are two 

 typical males, one from Fort Garland, Colorado, August 9, 1907, 

 on Chrysothamnus (L. Bruner), and the other from Ute creek, 

 9,000 feet, August 12, 1907 (R. W. Dawson). 



36 



