207 



once oj fluid ounces of sulphuric acid. Turned the blower five minutes. 

 11.25 to 11.40 a. m., September 26, sun shining, light breeze. Tree 10 

 feet high by 9 in diameter. Placed a piece of cotton batting over the 

 opening in the generator as before. October 19, one-fifth of the leaves 

 were killed ; found no live red scales. Before being operated on this 

 tree was in a very unhealthy condition. 



(216) Took 3J ounces dry cyanide and 8 ounces of water, added at 

 once 4 ounces of pure sulphuric acid= Turned the blower five minutes. 

 1.50 to 2.05 p. m., September 26 ? sun shining, light breeze. Tree 11 feet 

 high by 8 in diameter. Placed cotton batting over the opening in the 

 generator as before. October 19, about eight dozen leaves were killed ; 

 found three live red scales. 



(217) Took 5 ounces dry cyanide and 10 ounces of water, placed the 

 generator under the tent and added at once 5 J ounces pure sulphuric 

 acid and placed a barley sack over the generator. 2.35 to 2.50 p. m., 

 September 26, sun shining, light breeze. Tree 12 feet high by 10 in 

 diameter. October 19, leaves and fruit uninjured; found no live red 

 scales. 



(218) Took 6 ounces dry cyanide and 12 ounces water, placed the gen- 

 erator under the tent and added at once 6J ounces of pure sulphuric 

 acid, after which a barley sack was placed over the generator. 3.25 to 

 3.40 p. in., September 26, sun shining, light breeze. Tree 12 feet high 

 by 10 in diameter. October 19, a few leaves at the top of the tree were 

 killed; found no living red scales. 



(219) Took 7 ounces dry cyanide and 14 ounces of water, placed the 

 generator under the tent and added at once 7 J. ounces of pure sulphuric 

 acid, after which a barley sack was placed over the generator. 4.10 to 

 4.30 p. m., September 26, sun shining, light breeze. Tree 11 feet high 

 by the same in diameter. October 19, a few leaves at the very top of 

 the tree were killed and some of the green lemons were injured ; found 

 no live red scales. 



THE LARViE OF HYPODERMA B0VIS, De Geer. 



By Cooper Curtice, Veterinarian. 



In the course of investigations of the Bureau of Animal Industry 

 made during December, 1889, and January, 1890, 1 have been collecting 

 the larvae of Hypoderma bovis from cattle. I found larvae of the first 

 stage* (1) in the oesophageal walls, (2) one specimen under the pleura 

 near the eleventh rib, (3) in the subcutaneous tissue of the back, and 

 (4) in subcutaneous tumors which opened by an orifice upon the exter- 

 nal skin. Larvae of the second and third stages have been discovered 



*By first stage I mean the earliest stage found. They were from lO-lS 01 " 1 long and 

 1.5 mm thick, and were similar to the first stage of Hypoderma diana, as figured by 

 Brauer (Mon. d. (Estriden).— C. C. 



