492 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



5. (determined by H. L. Viereck), same place and date, on 

 Olaytonia virginica (Crawford, No. 4025) (female) ; 

 jStylops erigeniae Pierce. 

 grandior multiplicatiformis Viereck (determined by H. L. 



Viereck), Big Fork, Montana, June 21, 1904 (females); 



jStylops grandior Pierce. 

 imitatrix femiingeri Viereck (determined by H. L. Viereck), 



Falls Church, Virginia, April 14 (N. Banks) (female). 

 imitatrix texana Cresson (determined by H. L. Viereck). 2. 



Texas (female). 

 medionitans Cockerell (determined by T. D. A. Cockerell), 



Florissant, Colorado, June 24, on Gerasus meloMocarpa (T. D. 



A. Cockerell) (females) ; Stylops msdionifans Pierce. 

 moesta Smith (determined by H. L. Viereck) (male) Govan, 



Washington, March 29, 1911 (J. A. Hyslop^ (females); 



Stylops moestae Pierce. 

 nasoni Eobertson (determined by H. L. Viereck). 3. Mary- 

 land, near Plummers Island, April 16, 1916, on Salix humilis, 



H. L. Viereck (female). 

 neonana Viereck (paratype), Georgia (collection Philadelphia 



Entomological Society) (female) ; Stylops neonaime Pierce. 

 vicina Smith (determined by H. L. Viereck). 



3. Phimmer's Island, Maryland, April 20, 1916, on Dentaria 



laciniata (A. H. Pottinger) (females) ; Stylops vi- 

 cinae Pierce. 



4. Lahaway, Ocean County, New Jersey, on Gaylussacia 



frondosa (female and triungulinids) ; Stylops vicinae 

 Pierce. 



5. (determined by J. C. Crawford), Cabin John Bridge, 



Maryland, May 16, 1916, on Barharea harbarea (A. H. 

 Pottinger) (female), Stylops vicinae Pierce. 



6. (determined hj T. D. A. Cockerell) Salina, Colorado, 



April 14, on Berberis repens (W. P. Cockerell) (fe- 

 male) ; Stylops vicinae Pierce. 



7. (determined by T. D. A. Cockerell), Boulder, Colorado, 



April 17, 1908, on Crataegus coloradensis (S. A. Eoh- 

 wer) (female) ; Stylops vicinae Pierce. 



8. determined by H. L. Viereck), Plummer's Island, Mary- 



land, April 16, 1915 (J. C. Crawford) (females) ; Sty- 

 lops vicinae Pierce. 

 Halictus Latreille : 



sparus Robertson (determined by Crawford). 



3. Vienna, Virginia, April 18. on Salix tristis (E. A. Cush- 

 man) (Crawford, No. 4592) (female). 



