222 PROCEEDINGS OF THE NATIONAL MUSEUM vol.104 



been referred to different species and others have been omitted due to 

 the difficulty of assigning them to a species. 



It was also difficult, owing to the nomenclatorial confusion, to guess 

 whether some of the early biological notes referred to this species or 

 some other. However, the two references cited below appear pertinent 

 for this species. Knaus (1927, p. 126) mentioned that at Medora, 

 Kans., a few specimens of filicornis were collected at light in early 

 July; they were not collected otherwise. Later, he stated (1928, 

 p. 98) that he had taken only two specimens at light that season and 

 had never seen them in bmTOws in the area. Other references by 

 Knaus (and others) add nothing to this information. 



Specimens examined: 19 males, 15 females. 



ARKANSAS; 1 male, 1 female. Hope; (1) June. 



ILLINOIS; 1 male, 1 female. St. Clair County. 



INDIANA; 3 males, 2 females. Hessville, Pine; (1) May, (1) June, (3) July. 



KANSAS; 2 females. Medora; (1) May, (1) June. 



MICHIGAN; 1 male. Douglas Lake; (1) June. 



MINNESOTA; Listed by Wallis. 



MISSISSIPPI; 4 males. Camp Shelby; (2) September, (1) October, (1) Decem- 

 ber. 



NEBRASKA; 2 males, 2 females. Antioch (Sheridan County), Halsey, Mead- 

 ville; (4) July. 



NORTH DAKOTA; 1 male. Sully's Hill National Park; (1) July. 



OHIO; 1 male. Ashtabula (Whitman Beach); (1) June. 



SOUTH DAKOTA; 2 males. Brookings; (2) August. 



WISCONSIN; 3 males, 7 females. Douglas County (Gordon State Nursery); 

 (1) May, (2) June, (4) July, (3) August. 



Bolboceras floridensis (Wallis) 



Odontaeus floridensis Wallis, 1928, p. 155. Type, male. Lake Worth, Fla., collec- 

 tion of Mrs. A. T. Slosson (AMNH). 



(?) Odontaeus filicornis Blatchley (not Say), 1928, p. 29. (Probably referable 

 to floridensis.) 



The type of this species, the only male available to Wallis, was 

 unarmed. However, Wallis (1928, p. 156) states that "horned speci- 

 m.ens are almost certain to occur and if so, judging from the shape of 

 the male genitalia, the horns will probably be movable." This 

 assumption has proven well founded, as I have examined several well- 

 armed males, all with the "movable" horn. 



Almost nothing is knoA\'n about this seemingly rare species. I 

 collected two specimens; one, a well-armed male, was taken at light, 

 and the second, a female, was collected in a can of fermenting malt. 

 From the collecting dates on the specimens seen, I would assume that 



