1929] 
Note on Chilosia hiawatha 
237 
A NOTE ON CHILOSIA HIAWATHA SHANNON 
By Charles W. Johnson 
Boston Society of Natural History. 
This species was described in 1922 1 from a single male 
collected by Dr. Jos. Bequaert at Forest Hills, Mass. On 
June 4, 1922, Mr. W. S. Brooks took a female at Topsfield, 
Mass., that I though might be Chilosia haiwatha, but the 
bare eyes and several minor differences seemed to make 
the determination doubtful. On June 10, 1926, Mr. F. H. 
Walker collected a male at Danvers, Mass., but from the 
description I was still doubtful. In June, 1928, Dr. J. P. 
Bill took a female at Wayland, Mass. On June 16, 1928, I 
collected a female at East Gloucester, Mass. On June 14 and 
17, 1929, I again visited the same place, near Braces Cove, 
East Gloucester, and captured twenty-one specimens, in- 
cluding three males. Most of the specimens were taken on 
the flowers of the tall buttercup (Ranunculus acris). On 
June 16, 1929, Mr. Nathan Banks took a female at Hollis- 
ton, Mass. 
I now felt sure that these were the males and females of 
Chilosia hiawatha, notwithstanding the sexual differences 
and discrepancies in the original description. To make sure, 
however, I submitted a male to Mr. Charles T. Greene of 
the U. S. National Museum, pointing out some of the char- 
acters not clearly defined in the description, and received 
the following note based on the type. 
“The ‘central, longitudinal groove’ is in the frontal 
triangle (not the ocellar triangle) ; the halter is pale lute- 
ous with a brownish infuscation at the base of the stem 
1 A Revision of the Chilosini. By Raymond C. Shannon Insec. 
Inecit., vol. 10, pp. 47-145. 
