iSgi.] Lawrknck Oil Chictitra (loiiiuiicaiia coLi rdinni. CO 



Length Chord of wing Longest rectrix 



173-99 99-S2 72-64 



166.37 99-82 69.34 



173-99 98-29 70.86 



171.45 96.52 73.40 



166.37 97-79 • 71-37 



163.32 97.02 67.56 



168.91 93.98 66.80 



168.66 9S.80 . 71.12 



16S.66 94-74 70.61 



The minimum extremes of the females for both seasons represent the 

 actual size of the two smallest ones. In the males, however, these were 

 obtained from different specimens. It will be noticed that the wing and 

 tail measurements of the smallest males and the largest females overlap. 

 Where there is such wide individual deviation, it is remarkable that the 

 general averages of the two series differ so little. This is further illustrated 

 in the appended table of the means of three groups of females — the pro- 

 duct of three days' shooting (Nov. 24, 29, Dec. 8, 1888) in a single field : 



Chord of Longest 



No. Spec. Length Extent wing rectrix 



13 168.40 308.16 96.26 69.34 



20 169.16 308.36 96.01 68.32 



12 169.16 308.36 96.01 69.34 



The great uniformity with which the Horned Larks of this section fall 

 within the limits prescribed for praiieola, evinces that they are drawn 

 from the centre of distribution of the subspecies during the breeding 

 season and not froin the confines of the habitat of another form. 

 ( To be concluded.^ 



DESCRIPTION OF A NEW SUBSPECIES OF CYPSE- 



LID^ OF THE GENUS CH.^TURA, WFrH A 



NOTE ON THE DIABLOTIN. 



BY GEORGE N. LAWRENCE. 



Chsetura dominicana colardeaui. 



Cluetura, Lawr. Proc. U. S. Nat. Mus. 18S5, p. 623. 

 Male. — Crown, lores, and upper plumage black; rump brownish ash- 

 color; upper tail-coverts brownish black; tail black; the spines project 



