CROSSES AND FERTILITY OF WILD SPECIES OF PIGEONS. 



11 



List of crosses {continued). 



Description. 



Relation- 

 ship. 



Remarks on hybrids. 



50-51 

 52 



Male. Female. i 



Stig. aenegalensis X { ?'• ''.'^^* ' » ^^"- 



\ St. risoria '^ | Oen. 



•Senagalensia-alba X ( ^f ' "8"°%* ' °<^°- 



\ St. risona * 



Senegalensis-ris X St. alba * 



Orient-tur-ris-alba X St. capicola * 



St. humilis X St. risoria 



St. damarensis X risoria-alba * 



Za. vinaceo-rufa X Zen. carolinensis * 



Mel. leucoptera X alba-ris x ris-alba 



C. turbata X C. livia (or dom.) 



C. leuconota ^ X C. livia 



C. oenas X C. livia domest 



C. admista X C. palumbua 



X C. gyrans * 



f C. tabellaria 



62 Laticauda-n 



63-64 C. guinea (No. 1) X j 



I C. turbata-C. livia. 



I C. affinis domestica. 

 65-656 C. guinea (No. 2) X -j C. tabellaria 



I C. turbata-C. livia. 



66 Turbata-tabellaria X turtur-orientalis 



67 C. tabellaria X St. risoria 



68 C. laticauda (white) X St. risoria 



69 C. gyrans X St. risoria 



70 I C. illyrica X St. risoria 



71 ! C. admista X St. risoria 



72 I C. laticauda (black) X St. risoria 



Sp.- 



Fam. 

 Fam. 

 Fam. 

 Fam. 

 Fam. 



lOcT, 9 Fertile. 



"c?, 3 9 {+1(3' or hermaph.). 



2rf', 1 9 ' (2?) lived 2 to 5 mo. 



lOcf , 19 ! 1 sex abnormal. 



19 I Lived 3 years. 



' Uncertain. 



lid', 12 9 , Fertile. 



•Id' Not tested. 



9tf, 6 9 I Fertile. 



Icf I 2?; infertile. 



lOd', 8 9 Fertile. 



1 hat., died young. 



Scf, 2 9 Fert. w. domestica. 



2 died at 4 to 7 da. 



3 not long-lived. 



3cf ,8 hat.; 7 lived 1 to 19 da., 1 



lived 15+ mo. 

 '8 hat.; lived 5 to 10 da. 



Id', 1 9 I 9 hat.; 1 9,« inf.; Id" fertile. 



2d', 4 9 I Lived 10 to 20 mo. 



4 hat.; lived 7 to 10 da. 



lOd', 7 9 Lived 1 da. to H yrs. 



2d' \ Infertile. 



Id' Weakly fertile. 



7d' Infertile. 



Id" 4 lived few da. ; inf. 



6d' Infertile. 



21 d" Infertile " (A 1/7) 



' Cross made (1911) by the editor. 



' It does not now seem certain that this bird was : 

 autopsy. — Editor. 



' The data for this cross as found in a summary in 

 *The crosses marked with an asterisk (*) have bee 

 made by Professor Whitman. 



female; it acted as one, but laid no eggs. I find no record of an 



1/7; the original data are not available to the editor. 



idded from the records, l)y the editor, to an early summary (A 1/7) 



STATEMENT BY THE EDITOR. 



It will be seen that a number of hj^brids are here used as members of primary 

 crosses. The method used in the preceding lists and throughout this volume of 

 naming or designating hybrids, therefore, requires at this point a word of explana- 

 tion.3 This method will probably become clear from an exj^lanation of a single 

 example. In cross No. 23 of the above list the composition of the two birds entering 

 the cross is expressed as follows: Turtur-orientalis X hum. x huni-ris. That part 

 of the formula which is written in front of the largest X (or X X ) gives the com- 

 position of the male used in the cross; in this case T. turtur and T. orientalis. 

 The order of these two specific names indicates at the same time that this hybrid 

 sire has a turtur father and an orientalis mother, since the designation of the male 

 parent always precedes that of the female parent in every formula and in every 

 part of a formula. Similarly the portion of the formula written after the largest 

 X (or X X ) gives the composition of the female, in this case humilis x humilis- 



■' This is only in part the method used by Professor Whitman in making his records. He used two methods; in 

 the later years he employed a numerator-denominator formula in which the numerator gave the composition of 

 the father and the denominator that of the mother. He used an initial, or single letter, to designate a species and 

 grouped these symbols somewhat as in the method described above. His description of a bird of the composition of 



T-0 

 the one given above had the following form: p -r • It seemed to the editor that this sort of nomenclature, though 



very convenient for making the records, is not well suited to the purposes of publication. 



