Vol. 6] 



Miller: Avifauna of Fossil Lake. 



83 



Gallinae 



Tympanuclvus palidicinctus (Ridgeway). 

 Pedicecetes phasianellus columbianus (Orel). 



Aceipitres 



Pedicecetes nanus Schuffeldt. 

 Palaeotetrix gdli Schuffeldt. 

 Aqutta pliogryps Schuffeldt. 

 Aquila sodalis Schuffeldt. 



Striges 

 Passeres 



Bubo virginianus (Gmelin). 

 Euphagus afflnis Schuffeldt. 

 Corvus annectens Schuffeldt. 



ADDITIONAL SPECIES IN THE CALIFORNIA COLLECTIONS. 



Type specimen 4 no. 12605, Univ. Calif. Col. Vert. Palae., and 

 eotypes nos. 12603 and 12604. 



Femur larger than in M. occiclentalis and less curved in the 

 anteroposterior plane. Tarsus stouter in the shaft, with nar- 

 rower extremities, and with narrower intercotylar tuberosity. 



In examining a group of six grebe femora in the collection 

 there readily appeared a division of the group into two series. 

 One, embracing two specimens, corresponded in every particular 

 with the existing species ; the other, consisting of four speci- 

 mens, showed constant characters which were distinctly different 

 from the Recent form. The difference in size is evident upon 

 examination of the table of measurements recorded below. The 

 osteological characters are not at variance except as relates to the 

 degree of curvature of the shaft. The character is not such a 

 one as is readily measured but is easily evident on placing to- 

 gether bones from the two species. 



The tarsus of the new form is represented by four specimens. One is 

 perfect except for the loss of the middle trochlea ; the others consist of 

 two proximal and one distal fragment. The deviation from the existing 

 species is here noticeable in the proximal end of the bone. The tarsus of 

 M. lucasi is actually longer and the shaft stouter, but the head is quite ap- 

 preciably narrower. This compression of the head region has the effect 

 of reducing also, the width of the intercotylar tuberosity — a character at 



* I take pleasure in naming this species in honor of Mr. F. A. Lucas, 

 in whose hands this collection was originally placed for examination. 



Pygopodes 



Anseres 



Aceipitres 



^Echmopliorus lucasi, n. sp. 

 Erismatura jamacensis (Gmelin). 

 Circus hudsonius (Linnaeus). 



DESCRIPTION OF SPECIES. 



iECHMOPHORUS LUCASI, n. sp. 



