RECAPITULATION. 117 



10. Ammodramus caudacutus. In one known instance, September, 1862. 



11. Chondestes grammicus. One or two instances, summer of 1877. 



12. Milvulus forjicatus 1 In one alleged instance, May 6, 1861. 



13. Tyr annus verticalis. In one known instance, September 20, 1874. 



14. Nyctea scandiaca. Irregular ; from the north in severe winters. 



15. Falco peregrinus. Casual; in one known instance, December, 1S78. 



16. Astnr atricapillus. Irregular ; from the north in severe winters. 



17. Archibuteo lagopns saneti-johannis. In one known instance, 

 December 29, 1879. 



18. Chamwpelia passerina. In one known instance, many years ago. 



19. JEgialitcs semipalmatus. Casual, in migration. 



20. Macrorhamphus griseus. Casual, in migration. 



21. Ereunetes pusillus. Casual, in migration. 



22. Florida ccerulea. Occasional 5 from the south in late summer. 



23. Grtis pratensis. In one known instance. (Doubtless extirpated.) 



24. Ballus longirostris crepitans. In one known instance, September 

 8, 1882. 



25. Porzana jamaicensis. In one known instance, September, 1861. 



26. Gallinula galeata. Occasional ; chiefly in the fall. 



27. Mareca penelope. In one instance, in market, from Alexandria, 

 Va., spring of 1863. 



28. Harelda glacialis. Casual, from salt water. 



29. (Edemia americana. Casual, from salt water. 

 . 30. (Edemia fusca. Casual, from salt water. 



31. (Edemia perspieillata. Casual, from salt water. 



32. Phalacrocorax dilophus. In one instance, many years ago. 



33. Chroicocephalus atrieilla. Occasional, in summer. 



34. Sterna anglica. Occasional, in migration. 



35. Sterna forsteri. Occasional, in migration. 



36. Sterna hirundo. Occasional, in migration. 



37. RliyncJiops nigra. In one known instance, September 8, 1858. 



38. Cymochorea. leucorrhoa. On one occasion, many years ago. 



39. Oceanites oceanicus. In one known instance, many years ago. 



40. Puffinus obscurus ? In one known instance, many years ago. 

 There were 25 species in this category in the original edition, of which 



one (Colymbtts torquatus) has been transferred to category B, and to 

 which 16 species have been added. It is seen that of the total 23 spe- 

 cies which have been found in the District since 1862, 16 are merely 

 accidental or very rare visitors. 



