NEW MALLOPIIAGA. 39 



these types wherever they are found." Dr. Burnett 

 noted that "although there are single species (of para- 

 sites) peculiar to particular animals, there are others 

 which are found on different species of the same genus 

 as is the case in the parasites living on birds of the genus 

 Larus (Gulls) and the diurnal birds of prey." From an 

 examination of the structure of these animals, Dr. Bur- 

 nett was of opinion that they should be placed in an order 

 by themselves, closely allied to the Insecta; "they num- 

 ber about 250 species, the mandibulate parasites occupy- 

 ing the highest and the haustellate the lowest position in 

 the order." In the second paper Dr. Burnett makes a 

 curious argument for the theory of a special creation of 

 each species of animal based on the facts shown in his 

 study of the distribution of their parasites. 



Prof. A. S. Packard read at the meeting of the Amer- 

 ican Philosophical Society, September 2, 1877, a paper 

 "On the Systematic Position of the Mallophaga," which 

 was published in the Proceedings of the Society, 1887, 

 vol. xxiv, p. 264. Prof. Herbert Osborn has published 

 in Insect Life, 1890, vol. iii, p. 115, a "Note on the Pe- 

 riod of Development in Mallophaga," and in the same 

 journal, 1891, vol. iv, p.. 187, a paper on the " Origin and 

 Development of the Parasitic Habit in Mallophaga and 

 Pediculidee." 



I append a list of the American papers. 



BIBLIOGKAPHY. 



Burnett, W. I. Abstr. of paper read Feb. 6, 1850, in Proc. Bost. Soc. 

 Nat. Hist., 1850, vol. iii, p. 240; abstr. of paper read Aug. 7, 1850, in 

 same, p. 322. 

 Packard, A. S. " Certain Parasitic Insects," American Naturalist, 1870, 

 vol. iv, p. S3, ill. 



"On the Systematic Position of the Mallophaga," Proc. Amer. 

 Philosoph. Soc, 1887, vol. xxiv, p. 264, ill. 

 Leidy, J. Proc. Acad. Nat. Sci. Philadelphia, 1878, p. 100. 



