216 
Psyche 
[December 
THE TRICYPHONA INCONST ANS ON NANTUCKET 
ISLAND, MASS. 
By Charles W. Johnson. 
Boston Society of Natural History. 
While collecting insects along the margin of Upper Hum- 
mock Pond, Nantucket, June 25, 1926, I collected some speci- 
mens of this common species. I did not examine these carefully 
until my return home and was then surprised to find that the 
two or three I had pinned had an unusual number of super- 
numerary cross-veins in the second submarginal cell (cell 4), 
whereupon I went over the sweepings from that locality and 
found in all 15 specimens, all having the supernumerary cross- 
veins confined to cell 4. The numbers of the supernumerary 
cross-veins in the right and left wings are given in the following 
table. 
No. speciment 
Right wing. 
Left wing. 
3 (Fig. 1) 7 
3 4 
1 3 
2 3 
3 3 
1 3 
2 2 
1 1 
1 1 
3 
3 
4 
3 
2 
1 
2 
2 
1 
Visiting this place again on July 16 I was unable to find a 
single specimen. The locality was again visited June 7, 1927, 
and five were obtained showing the following variation. 
No. Specimens Right wing. Left wing. 
1 (Fig. 2) 7..... 4 
1 3 3 
3... 1... 3 
2 with normal vanation. 
