886 DR. R. W. SHTJFELDT ON THE OSTEOLOGY OF THE [DeC. 1, 



Fig. 8. Comihmia glareosa, p. 855. 

 9. Tkalera ohnupta, p. 865. 



10. Ephyra fluidaria, p. 856. 



11. Idcea (/)-andicularia, p. 858. 



12. Macaria boaria, (S,^.8CA. 



13. Zunclopteryx infelix, p. 858. 



14. Hyria voliitaria, p. 858. 



15. Id(Ba id(earia, p. 857- 



16. Asthcna, querida, p. 859. 



17. tristicxda, p. 859. 



Plate LVII. 



Fig, 1. Pyralis rohorealis, p. 865. 



2. Bcba milvinalis, p. 875. 



3. larthezch obstifella, J , p. 880. 



4. Chmitona kala, c?, p. 879. 



5. Melissoblaptes dcpressellus, p. 876. 



6. Metasia candidulalis, p. 880. 



7. Eupithccia bilinca, p. 863. 



8. conscensa, p. 863. 



9. Scapula fotalis, p. 875. 



10. Arrade massalis, p. 866. 



11. Pyralis quisqualis, p. 865. 



12. zieanicdis, p. 865. 



13. Botys epastalis, p. 874. 



14. Idesa chotaria, j). 858. 



15. Eujnfkecia tcsfacea, p. 863. 



16. Scoparia iciericalis, p. 876. 



17. Pyralis xylinalis, p. 865. 



18. Nephopteryx lentalis, p. 877. 



19. Homaosoma derasella, p. 877. 



20. Kephopteryx creperalis, p. 877. 



2. Contribution to the Comparative Osteology of the 

 Trochitidce, Caprimulgidce, and Cypselidfe. By R. W. 

 Shufeldt, M.D., Captain Med. Dept. U.S. Army.^ 

 M.A.O.U., Memh, Soc. Nat. E.U.S., Memb. Philoso- 

 phical, Anthropological, and Biological Societies of 

 Washington, &c. 



[Eeceired September 16, 1885.] 

 (Plates LVIII.-LXI.) 



As our knowledge of the structure of birds widens, it becomes 

 more and more evident to taxonomists that ornithology nowhere 

 presents a more unnatural order than the Picari<x. Of late years 

 authors candidly confess that the families arranged under this head 

 constitute merely a provisional grouping, though at the same time 

 the classification as it now stands must be retained until such light 

 as morphology brings to bear is sufficiently strong to disperse this 

 artificial assemblage and relegate its members to their several and 

 normal positions in the system. 



So far as our American avifauna is concerned, it has always 



