248 The Ohio Journal of Science [Vol. XIX, No. 4, 



Specimens examined: Mesilla Park, New Mexico, on 

 sand hills, July 12, 1897, Cockerell. (Type, U. S. N. M.); 

 San Bernardino Ranch, Cochise Co., Ariz., 3,750 feet, August, 

 F. H. Snow. (Hine). 



Whether N. similis Brown (loc. cit.) is a distinct species is 

 doubtful. The original specimens have not been available, 

 hence a decision on this point is not possible. The chief char- 

 acter used for distinguishing the species, namely, number of 

 bristles on sides of abdominal segments, is shown to be variable 

 in N. abdominalis, and the variations may cover N. similis. 



Date of Publication, February 27, 1919. 



