1899.] NATURAL SCIENCES OF PHILADELPHIA. 23 



Anser albifrons gambeli (Hartl.). 



Anser frontalis Baircl. Bds. of N. Am., p. 76'2. 



6,055. New Mexico. Dr. T. C. Henr^^ marked by Cassin as " Type of 

 species. ' ' 



Two specimens are meutioued in the original description, and 

 this is evidently one of them. 

 Empidonax minimus (Baird). 



I'yrannula minima Baird. Proc. Acad. Nat. Sci. Phila., 1843, p. 284. 



4,4(i5 (1,161 S. F. B.). Carlisle, Pa. Aug. 16, 1843, from Baird. Type. 

 Empidonax flaviventris (Baird). 



Tyrannula flaviventris Baird. Proc. Acid. Nat. Sci. Pliila., 1843, p. 

 283. 



The type of this species was also presented to the Academy (see 

 Proc. Acad. Nat. Sci. Phila., 1843, p. 289), but is not now 

 extant. 

 Lanius fallax, or some allied Old World species. 



Collurio ludovicianus robustus Baird. Baird, Bi'ewer and Ridgway. N. 

 A. Bds., i, p. 420 (1874). 



15,303. ["California."] Dr. Gambel. 2"ype. 



The specimen probably came from the Old World (see Stejneger, 

 Proc. Acad. Nat. Sci. Pliila., 1885, p. 91). 

 Vireolanius eximius Baird. 



Vireolanius eximius Baird. Jiev. Amer. Bds., 1864, p. 398. 



24,497. Bogota, from J. G. Bell. Type. 

 Dendroica rufigula Baird. 



Dendroica rufigula Baird. Rev. Amer. Bds., 1864, p. 204. 



8,675. Martinique. Rivoli coll. (?) Type. 

 Platycichla brevipes Baird. 

 Platycichla brevipes Baird. Rev. Amer. Bds., 1864, p. 32. 



While the Academy specimen, 24,495. is mentioned in the 

 description, the National Museum specimen, 23,954, seems to 

 have the better claim to recognition as the type. 



George N. Lawrence. 

 As in the case of Baird, Lawrence was a frequent contributor to 

 the Proceedings, though most of his types were preserved else- 

 where. Only two are in the collection. 



Thamnophilus virgatus Lawr. 



ThamnopJiilus virgatus Lawr. Proc. Acad. Nat. Sci. Phila., 1868, p. 361. 

 24,500. cf Turbo, Panama. W. S. and C. J. Wood, Michler Exp. Type. 



This species is wholly ignored in the Catalogue of Birds in the 

 British Museum, but is reestablished in the Biologia Centr. Amer.,. 



