180 KEPOET OF THE BUREAU OF ANIMAL INDUSTRY. 



A. Continued. 



* From June 7 to August 15, inclusive, cysticerci were found in most of the animals examined. 

 t No tseniae found in the two lambs. 

 j No teenise found in lambs. 



EXPERIMENTS. 



November 30, 1886. Six lambs selected from a ranch that had been kept in an 

 inclosure since the 15th of October, were with two yearlings and two two-year-old 

 wethers, crated and sent to the United States Veterinary Experimental Station at 

 Washington. The lambs were from a collection of the runts of a large flock which 

 had been fed on hay made from prairie grass and on coarse corn meal and bran 

 before November 30. They were watered from tubs, the water being drawn from 

 a well and a pond near by. The hay had not been crossed by sheep since spring, at 

 least. The water was clear. The chances of infection from these sources were 

 small. The corral where they were kept was a good warm shed, located amidst 

 others, with a small adjoining yard. The dogs, of which there were two and some- 

 times more, had free access by jumping the hurdles ; but I do not remember ever 

 having seen one in the inclosure after the lambs were admitted. With these lambs 

 \vere two old bucks and a few sheep, which were either lame or otherwise ailing. 

 They arrived in Washington, D. C., December 4, 1886, and were afterwards placed 

 in stalls where they could not be re-infected excepting from each other. As Table 

 B shows that there were no adult taenise in the lambs, re-infection could only be 

 through the four older sheep confined with them. Re-infection could not possibly 

 have proceeded from some Eastern sheep confined with them, for these sheep when 

 examined had no T. fimbriata. No dogs were admitted to the box stalls where 

 they were kept. Their food was Eastern clover and mixed corn and bran. They 

 were furnished with well-water and salt. The adults were numbered 101 to 104 ; 

 the lambs from 105 to 110. 



December 9. Two Eastern lambs, Nos. Ill and 112, were put in the pen with Nos. 

 101 to 110 inclusive. Nos. Ill to 118 were a number of Eastern coarse-wooled sheep, 

 bought for experimental purposes. 



December 13. Nos, 111 and 113 were found to pass mature embryo bearing pro- 

 glottides of Tcenia expansa. 



December 17. --Fed Nos. 105, 107, and 109 with proglottides of T. expansa from 

 Nos. Ill and 113. 



