Vol. 30, pp. 159-160 July 27, 1917 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOTES ON MAINE MAMMALS. 

 BY MANTON COPELAND AND ALTON S. POPE. 







For several years the writers have trapped small mammals in 

 a number of different localities in Maine, and during that time 

 certain rare or interesting species, infrequently recorded from 

 the State, have come to light. It seems desirable to make some 

 of these records available to those who are interested in the 

 mammalian fauna of New England. 



Synaptomys cooperi fatuus. 



Brassua Lake. Two specimens were trapped by E. C. Pope, October 

 27 and 29, 1913, in a clearing overgrown by raspberry bushes in runs 

 frequented by Evotomys and Microtus. 



Grafton. On September 10, 1915, a female, containing tbree embryos 

 measuring about 6 mm. in length, was taken in a sphagnum bog under 

 the roots of a small spruce tree. Dr. G. M. Allen, who has kindly ex- 

 amined the skin and skull, makes the following report: " I have com- 

 pared your Synaptomys carefully with the type series of S. fatuus and 

 with Massachusetts specimens considered typical of S. cooperi, and should 

 call the Grafton specimen S. cooperi fatuus. It is not quite adult, and 

 it is peculiar in having the skull rather shorter in proportion to its 

 breadth than what seems normal. In some respects it is intermediate 

 between the two forms, but on the whole it is nearer fatuus. Its skull 

 is not quite so narrow in proportion to the total length as in typical 

 fatuus, yet not so wide as in cooperi ; the postorbital margin is more like 

 fatuus, i. e., not so nearly at right angles to the axis of the skull. The 

 audital bullae seem small as in fatuus. The upper incisors, while not 

 quite so narrow as in typical fatuus, are not so broad as in cooperi, and 

 the same is true of the lower incisors. Altogether, the skull is much 

 more as in the smaller form." This conclusion is in accord with that 

 reached by B. H. Dutcher, who records a specimen from Mt. Katahdin 

 " that seems, on comparison with material in the Biological Survey Col- 



(38)— Proc. Biol. Soc. Wash., Vol. 30, 1917. (159) 



