50 
Psyche 
[Vol. 92 
zone (between high and low tide marks). The records are mapped in 
Figure 1 . Specimens are in the collections of: American Museum of 
Natural History, New York [AMNH], California Academy of 
Sciences, San Francisco [CAS], Canadian National Collection, Bio- 
systematics Research Institute, Ottawa [CNC], Field Museum of 
Natural History, Chicago [FMNH], Paul J. Johnson, Moscow, 
Idaho [PJJ], Museum of Comparative Zoology, Harvard Univer- 
sity, Cambridge [MCZ], Memorial University of Newfoundland, St. 
John’s [MUNF], University of New Hampshire, Durham [UNH], 
U. S. National Museum of Natural History, Washington [USNM], 
University Zoological Museum, Helsinki [ZMH], and the author 
and Alfred F. Newton, Jr., Cambridge [ANMT]. In the following 
records, A = adults and LI, LI I, LI 1 1 = larvae of each instar. 
Canada: Newfoundland: Change Is., Aug. 1-9, 1981, lot 6, D. 
Larson [no ecol. data] (12A) [MUNF, ANMT]; Grand Bruit, S. 
Newfoundland, N:o 55, 18.6.1949, Ernst Palmen [no ecol. data] 
(1 A) [ZMH]; St. John Island, St. John Bay, NW Newfoundland, N:o 
195, 3.8.1949, Ernst Palmen [no ecol. data] (1 A) [ZMH]; 2mi S St. 
Pauls, VIII 1-1972, J.M. Campbell (12A) [CNC, ANMT]; same 
locality, VIII-10-1972, J.M. & B.A. Campbell (15A) [CNC]. 
Quebec: Mont-St.-Pierre, V1I-18-1972, J.M. Campbell (1 A) [CNC]. 
United States: Maine: Lincoln Co., Monhegan Island, nr. Seal 
Ledges, 16.VII.1982, M. Thayer & A. Newton (374A; 3 12L: 16 LI, 
108 LI I, 188 LI 1 1) [AMNH, ANMT, CAS, CNC, FMNH, MCZ, 
MUNF, PJJ, UNH, USNM, ZMH]; Monhegan L, N of Calves 
Cove, 17. VII. 1972, M. Thayer & A. Newton (22A; 12L: 1 LI, 3 LII, 
8 LI 1 1) [ANMT]; Monhegan I., Deadman’s Cove, 17.VII. 1982, M. 
Thayer & A. Newton (1 LII) [ANMT]; York Co., Isles of Shoals, 
Appledore Island, 28-29. V. 1983, M. Thayer & A. Newton (25A, 4 
LI 1 1) [ANMT, UNH]. Massachusetts: Essex Co., Nahant, nr. East 
Point, 10.VIII. 1982, M. Thayer & A. Newton (2A) [ANMT, MCZ]. 
A further collection, undoubtedly of M. marinum although I have 
not seen the specimens, is: New Hampshire: Rockingham Co., Isles 
of Shoals, ne side of Star Island, 3 July 198 1 , on intertidal rocks, W. 
F. Gimpel, Jr., collector (W. F. Gimpel, Jr., personal communi- 
cation). 
There has been speculation about the natural food of M. mari- 
num , but no field observations have been made. Laboulbkne (1858) 
