12 Entomology and Zoology Department. [Bull. 168 



Date. Conditions for breeding, number of embryos, etc. 



Mar. 22, Pregnant, but number of foeti not distinguishable. 



Mar. 26, Pregnant, but number of foeti not distinguishable. 



Mar. 29, Pregnant, but number of foeti not distinguishable. 



Mar. 30, Two fceti in each horn of uterus; about as large as navy bean. 



Mar. 30, Two foeti in each horn of uterus; about as large as navy bean. 



Apr. 1, Two foeti in each horn of uterus; a little smaller than the above. 



Apr. 2, One foetus in right horn of uterus, two in left; size of hulled 

 peanut. 



Apr. 8, Indications that the young had been recently born. 



Apr. 9, Two foeti in each horn of uterus; size of navy bean. 



Apr. 10, Indications that young had been recently born; milk in glands. 



Apr. 11, Three foeti; size of small navy bean. 



Apr. 13, Four foeti, very small but easily distinguishable. 



Apr. 13, Young evidently recently born; uterus flabby and veins con- 

 gested. 



Apr. 14, Young evidently recently born; number of foeti had been four. 



Apr. 14, Young evidently recently born; number of fceti had been four. 



Apr. 14, Young evidently recently born; number of foeti had been four. 



Apr. 15, Young born; evidences of being suckled. 



Apr. 16, Young evidently born. 



Apr. 17, Young born. Number of foeti had been four. 



Apr. 17, Young evidently born. 



Apr. 19, Young evidently born. 



Apr. 20, Young evidently born. 



Apr. 20, Young evidently born. 



Apr. 22, Four young moles taken in nest; weighed one ounce each. 



SUMMARY. 



Number of females pregnant or having recently borne young 33" 



Normal number of young, apparently 4 



Largest number of young in any case 5 



Smallest number of young in any case 3 



Number of cases in which foeti were distinguishable .' 10 



Cases in which condition of uterus indicated number of young recently 



born 4 



Nests of young moles 1 



Cases of 4 foeti 12 



Cases of 3 foeti * 2 



Cases of 5 fceti 1 



FOOD. The moles and the shrews constitute the sole repre- 

 sentatives in North America of the mammalian order Insectiv- 

 ora (insect-eaters). A study of their dentition, the character 

 of their food, and their general behavior in several respects, 

 shows that they are much more closely related to the carniv- 

 orous or flesh-eating mammals than to the rodents, a group- 

 which includes the rats, mice, rabbits, squirrels and the like.. 

 This is especially true of the shrews, which are quite weasel- 



