90 



ety, in bchnlf of the author, a Avoik by Dr. George A. 

 Otis, U. S. Army, containing a list of the human crania 

 and skeletons now in the collection of the Army Medical 

 Museum at Washington. jMr. Putnam said tliat this 

 work was very complete in the measurements given, 

 and Avas a valuable addition to the library as a work of 

 reference. 



Mr. Putnam read a communication on the 



BIRDS OF NORTH-EASTERN ILLINOIS. 

 By E. W. Nklson. 



The region about the soiitlicrii end of Lake Michigan, in Illinois, 

 presents an unusually fertile fltld for the ornithologist. Situated, as 

 it is, midway between the wooded region of the East and the treeless 

 plains of the West, with the warm river bottoms of tlie South, rich in 

 southern species, extending within a comparative!}' short distance, 

 and the Great Lakes upon the nortli, North-eastern Illinois forms a 

 kind of "four corners" where the avian-fauiiaj of four regions inter- 

 gradc. To the proximity of Lake Michigan we are indebted for a 

 number of more or less strictly mariiime species, among the most 

 important of which are, during summer, Ammodromiis caiidacutus, 

 uEgiaUlis nidodus and Anas obsciira, and, during the migrations, Strep- 

 silas intcrprc's, Tringa hoiivpartn, T. marilima, T. canuia, CuUdris are- 

 naria, with all the common water birds, with very few exceptions, 

 found upon the coast at tbat season. In winter the list is larger, 

 during which season are found Hiatrionicus torqiiatits, Harelda glacialis, 

 the three species of CEdemia, Somateria moUissima, S. spectahilis, /Ster- 

 corariiis pomatorhinns, Larus glaucus, L. leucaptcrus, L. marinus, and 

 Hissa tridaclgla. 



As would be expected, the southern species occur only in summer, 

 "with the exception of Lophophaiics hicolor, which is found only in 

 winter. The principal southern species are : Mimus polnglottus, Fariis 

 carolinensis, Thryothoriis ludovicianus, 2'. hcwidd, Frotunotaria ciirea, 

 Dendroica var. albilura, D. ccerulea, Oporornis formosiis, Icteria virens, 

 Myiodiuctcs mitrutus, Pyranga ceslica, CoUitrio var. ladoviciana, Cardi- 

 nalis virginianiis, Centunis carolimis, JS'aitclems forficalns, Bhynogry- 

 plms aura, Tantalus luculator, GalUnula martiidcu, Porzana jamaiccnsis, 

 Sterna regia and S. antillarum. 



We have also, either as residents or transient visitants, the follow- 

 ing western species: Myiadcstes toionscndi, Vireo belli (breeds), i/es- 



