766a. Sialia sialis azurea. 

 '21 bis. Add: Sialia sialis azurea. Azure Blukbird. Similar to 5. sia/Zs ; the blue 

 of a greenish shade, and the tail upward of 3.00. Southern Arizona and southward. A slight 

 variety, scarcely recognizable. 



28. Sialia mexicana. 

 2.0. arctica. 



31. Cyanecula suecica. 



32. Fhyllogcopus borealis. 



33. Regulus calendula. 



767. Sialia mexicana. 



708. arctica. 



[764.] Cyanecula suecica. 



747. Phyllopseuste.s borealis. 



749. Regulus calendula. 



750 obscurus. 



33 6/s. .4 (W; Regulus calendula obscurus. Dusky Kinglet. Resembling the com- 

 mon ruby-crown, but with darker and more plumbeous shade of the upper parts, and some 

 slight differences in proportions. A dark insular form described from Guadalupe Island, Lower 

 California. Since the publication of the Key, the A. O. U. Committee has decided to 

 include " Lower California, with the islands naturally belonging thereto," in the " North 

 American" avifauna, — a decision in which I concur. (Code, p. 14.) 

 34. Regulus satrapa. 1 748. Regulus satrapa. 



35. satrapa olivaceus? 



36. Polioptila coerulea. 



37. melanura. 



38. plumbea. 



39. Chamsea fasciata. 



39a. fasciata henshawi. 



40. Lophophanes bicolor. 



748a. satrapa olivaceus. 



751. Polioptila cserulea. 

 753. californica. 



752. plumbea. 

 742. Chamaea fasciata. 

 742a. fasciata henshawi. 

 731. Parus bicolor. 

 000. [Not in the List.] 



40 6is. Add: Lophophanes bicolor texensis. Texan Tufted Titmouse. Paler 

 than the last, with chestnut instead of black frontlet at base of crest ; this chestnut corres- 

 ponding in tint to that which suffuses the sides of the body. Tarsus 0.85; bill 0.45. 

 Southern Texas. The Auk, Jan. 1887, p. 29. 

 41. Lophophanes inornatus. I 733. Parus inornatus. 



I 733a. Parus inornatus griseus. 



41 his. Add : Lophophanes inornatus griseus. Gr.\y Titmouse. Said to differ from 

 ordinary moma?ws in rather larger size and decidedly grayer color. Wing 2.90; tail 2.55. 

 Middle Province of the United States ; Colorado, Utah, Nevada, New Mexico, and Arizona. 

 Pr. U. S. Nat. Mus., v., 1882, p. 344. 



I 733?*. Parus inornatus cineraceus. 

 41 /er. Jdd: Lophophanes inornatus cineraceus. Ashy Titmouse. Another alleged 

 local race, described as even grayer above and paler below than L. i. griseus, with smaller 

 bill, black in color. Lower California. Pr. U. S. Nat. Mus., vi., Oct. 1883, p. 154. 

 42. Lophophanes atrocristatus. I 732. Parus atricristatus. 



I 000. [Not in the List.] 



42 Us. Add : Lophophanes atrocristatus castaneifrons. Chestnut-fronted Tit- 

 mouse. Resembling the last : upper parts plumbeous, faintly tinged with olive; under 



