PRELIMINARY NOTES ON THE MUTILLIDAE OF MINNESOTA 103 
dunes, Anoka county (A. T. Hertig); 139 August 8, 1922, Fridley 
sand dunes, Anoka county (C. W. Johnson). 
This species is easily recognized by its small size and the appressed, 
silvery pubescence of the head and thorax. 
Dasymutilla chlamydata (Melander) 
1903. Mutilla chlamydata Melander, Trans. Amer. Ent. Soc., xxix, 299 @?. 
1918. Dasymutilla ferrugata Washburn, 17th Rept. State Ent. of Minnesota, 200, 
fig. 98 (not of Fabricius). 
Specimens examined: 9? August 5, 1896, Gray Cloud Island ; 
22 August 20, 1896, Gray Cloud Island; 29 September 3, 1899, Gray 
Cloud Island; 59 August 1, 1922, Jordan, Scott, county (Av T. Her- 
Moe © Aucust 25, 1922, Barden, Scott ‘county (©. E. Mickel); 
9 July 17, Ramsey county ; 3? Hennepin county; 39 July 27, 1922, 
Fr snelling (C. E. Mickel); 639 July 21, 1922, Fridley sand dunes, 
Anoka county (C. E. Mickel); 309 July 24, 1922, Fridley sand. dunes, 
Anoka county (Paul Gilmer) ; 13 2 July 24, 1922, Fridley sand dunes, 
Anoka county (C. E. Mickel) ; 123 9 July 28, 1922, Fridley sand dunes, 
Anoka county (Paul Gilmer); 146¢ July 28, 1922, Fridley sand 
dunes, Anoka county (C. E. Mickel); 259 August 8, 1922, Fridley 
Samy dunes Anoka county (AL T. Hertic) > 31 9 “August 8; 1922, 
Fridley sand dunes, Anoka county (C. W. Johnson). 
This is the most abundant species at the Fridley sand dunes. It 
is found in sandy localities‘over a wide area in the middle west. The 
individuals vary a great deal in size, the length varying from 7 to 
15 mm. They also vary in color from a golden yellow to a deep 
ferruginous. The series can be separated into two sections: those in 
which the color is for the most part yellowish and which vary in 
size from 7 to 10 mm.; and those in which the color is for the most 
part ferruginous, and which vary in size from 12 to 15 mm. How- 
ever, I can find no other tangible characters upon which to separate 
them and for the present have designated all of them as chlamydata. 
If a study of their life history can be made, it may throw some light 
on this variation. It seems probable that this species is parasitic in 
the nests of Bembix pruinosa Fox, or in those of Microbembex mono- 
donta Say, or perhaps in both. 
Dasymutilla bioculata (Cresson) 
1865. AMutilla bioculata Cresson, Proc. Ent. Soc. Phila., iv, 431 ¢@. 
1899. Mutilla bioculata Fox, Trans. Amer. Ent. Soc., xxv, 243 ¢. 
1918. Dasymutilla bioculata Washburn, 17th Rept. State Entomologist of Minne- 
sota, 200, fig. 97. 
