10 



Trans. Acad. Sci. of St. Louis 



crushed insects, mostly small beetles, from the craw. 

 About a fortnight old they are fed from the bill with soft 

 insects of the size of large flies, but insects with stings, 

 such as bees and wasps, are never brought. When four 

 weeks old, large dragonflies, grasshoppers and butter- 

 flies make the principal food. 



The young Martins do not leave their box until they 

 are six weeks old. 



The table needs no further explanation except that the 

 occupants of the sixteen boxes were of all ages, from one 

 week old in No. 6 to five weeks in Nos. 12, 16, 17. 



The number of hungry mouths has something to do 

 with the frequency of the visits. No. 7, which heads the 

 list, has four young ones (four weeks old), while most 

 of the other boxes have three. No. 16 has only two. 



WEATHER CONDITIONS. 



75* 

 74* 

 77' 

 84' 

 85* 

 86" 

 87' 

 89* 

 82» 

 83* 

 78' 

 80" 

 79» 

 ?»• 

 82* 

 81» 



calm, eletr 



to 84°, viBdlitbt, S. . .. 



to 85° 



to 86° 



to 87° 



to 89°, wind increuios 8. 



, ttonn appmachijit, wind sbiftiDg to W. 



, rain comffleneing at 1 :2S 



, rain eeaM«at 2:45 



, elearint, calm 



to 82°, wind 8.W. , 

 to 81°, calm, clear, 

 to 80°, calm, dear. 



Time. 



INclNo. INo. INo. 

 7 12 17 5 



4 to 5 . 



5 to 6 

 6to 7 

 7to 8 



8 to 9 



9 to 10 



10 to n 



11 to 12 



12 to 

 Ito 

 2to 



3 to 



4 to 



P.M. 



5 to 6 

 6to 7 

 7to 8 



I I 

 9 

 9 

 16 

 22 

 16 

 22 

 20 

 23 

 22 

 13 

 8 

 35 

 20 

 11 

 23 

 11 



|312|284|280|275I254 



No. [No. INo. INo. No.lNo. 

 11 10 24 25 22 16 



40| 32 



249|217|203 



203 



192 



185 



149 



12 



147 



134 



No. 



T'l. 



85 

 118 

 171 

 202 

 232 

 276 

 265 

 217 

 250 

 132 

 119 

 459 

 224 

 166 

 195 

 177 



103 



90 



3277 



Nambtr nf lisiu bjr sale. . . 

 NnatMr of fijiu bj tmuit. 



I I I I , , , 



|119|164]140|128 127 92 831119 

 193 120 1401147 127 157 134 84 

 I I I I I I 1 1 



981 61 73 

 105 131112 



33 145t 

 57 1823 



