8 PROCEEDINGS OF THE NATIOlsrAL MUSEUM vol.77 



the same host, Maywood, Va., July 22, 1926 (1 female) ; from same 

 host, Four-mile Run, northern Virginia, August 17, 1913 (1 male, 1 

 female) ; same host, District of Columbia, August 20, 1895 (4 

 females) ; same host, Arendtville, Pa., May 20, 1923 (1 female) ; 

 same host, Columbus, Ohio, June 5, 1899 (3 nymphs) ; from Aero- 

 nautes Tnelanoleucus^ San Bernardino County, Calif., November 30, 

 1916 (4 females) ; from Ghaetura richtnondi^ Eden, Nicaragua, 1922 

 (1 female) ; from Falco rusticolus, Commander Islands, February 

 28, 1883 (1 female) (straggler). The original description of this 

 species was based on immature specimens and, according to Ferris 

 (1916), it "is very likely a synonym of either D. hurmeisteri or 

 D. tibialis.''^ Ferris examined a cotype of D. hruneH (Carriker) and 

 said that it " is almost certainly a synonym of D. duhius-^^ The 

 present writer agrees with Professor Ferris in regarding hruneri as a 

 synonym of dubius. 



This species which apparently has the chimney swift for its favored 

 host, also is found on the other swifts. It is variable to a consider- 

 able degree in the adult state and of course the characters of the 

 immature individuals are decidedly different from those of the 

 adults. 



Annotated List of Species of the Sdbgbnus Dennxus with their Type Hosts 



1. D. 'bruneri Oareiker (1903). Univ. Neb. Stud., vol. 3, p. 55. 



Type host: Aeronautes melanoleiicus (=Z). duMtis Kellogg.) 



2. D. hurmeisteri Denny (1842). Anop. Brit., p. 230, pi. 22, fig. 5. 



Type host: Micropiis apus. (=!>. truncatus Olfers.) 



3. D. distinctus Fesris (1916). Can. Ent., vol. 48, p. 310, figs. 10a, 15. 



Tyt)0 host: CollocalUa species. 



4. D. duUus Kellogg (1896). New Mallophaga, vol. 2, p. 540, pi. 73, fig. 6. 



Type host: Ghaetura pelagica. (May = Z). truncatus Olfers.) 



5. D. femuralis Kistiakowsky (1926). Zool. Anz., vol. 68, p. 10, fig. 1. 



Type host: Eirundo rustica gutturalis. 



6. D. major Uohida (1923). Tokyo Journ. Col. Agr., vol. 9, No. 1, p. 32, 



figs. 10-11. 



Type host: Eirundapus caudacutus caudacutus. (Described as type 

 species of Takamatsula.) 



7. D. meridionalis Carriker (1903). Univ. Neb. Stud., vol. 3, p. 178. 



Tyi^e host: Ghaetura griseiventris. 



8. D. minor Kellogg and Paine (1914). Rec. Ind. Mus., vol. 10, p. 242. 



Type host: Micropus afflnis. 



9. D. piageti Kistiakowsky (1926). Zool. Anz., vol. 68, p. 11, fig. 2. 



Type hosts: nypotriorchis subbuteo and Riparia rlparia. 



10. D. pulicaris Nitzsch (1861). Zeit. f. ges. Nat., vol. 18, p. 304. 



Type host: Micropus apus. {= D. truncatus Olfers.) 



11. D. tiUalls PiAGET (1880). Pediculines, p. 576, pi. 68, fig. 5. 



Type host: Micropus apus. (=£>. truncatus Olfers.) 



12. D. tibialis Carriker (1902) (not Piaget, 1880). Journ. New York Ent. See, 



vol. 10, p. 225, pi. 22, figs. 4, 5. 



Type host: Aeronautes melanoleucus. {=D. duHus Kellogg.) 

 18. D. truncatus Olfers (1816). De vegetativis, etc., p. 91. 

 Type host: Mao^opus apus. (Type species of genus.) 



