Swift. INSESSORES. CYPSELUS. 127 



lected upon the wing, cemented together by a viscid matter, 

 secreted for that purpose, by appropriate glands. They 

 never alight upon the ground ; the shortness of their legs, 

 compared with their great length of wing, preventing their 

 rise from a flat surface. 



COMMON SWIFT. 



Cypselus murarius, Temm. 



PLATE XLII. Fig. 4. 



Cypselus murarius, Temm. Man. d'Omith. v. 1. p. 434. 



Hirundo Apus, Lmn. Syst. 1. p. 344. b" Gmel. Syst. 1. p. 1020. sp. 6 



Lath. Ind. Ornith. v. 1. p. 582. sp. 32 Fau. Suec. No. 272 Raii S>n. 



p. 72. A. 4 Will. p. 156. t. 39 Briss. 2. p. 512. 15 — Id. 8vo. 1. p. 301. 



Micropus murarius, Meyer, Tasschenb. Deut. v. 1. p. 281. 



Brachipus murarius, Id. Vog. Li v. und Esthl. 143. 



Le ]\Iartinet noir ou Grand Martinet, Buff. Ois. v. 6. p. 643. — Id. PI. 



Enl. 542. f. 2 — Temm. Man. d'Ornith. v. 1. p. 434. 

 Thurm-schwalbe, Bechst. Naturg. Deut. v. 3. p. 929. — Frisch. Vog. t. 17- 



f. 1 Meyer, Vog. v, 1. Heft. 4. 



Swift, Br. Zool. No. I7I. t. 57 — Arct. Zool. 2. No. 33i.— Will. (Ang.) 



p. 214.— Albin. 2. t. 55.— Lezvin's Br. Birds, 3. t. 126.— Lath. Syn. 4. 



p. 584. M.—Pult. Cat. Dorset, p. 13 Mont. Ornith. 'Diet.— Wale. Syn. 



t. 254.-^ Bewick's Br. Birds, v. 1. p. 259. 



Provincial — Screech, Develing, Black Martin. 



This is the only British species of its genus, and is with Periodical 



• -i i jn visitant. 



US a summer visitant *. 



The Swift is seldom seen in the northern parts of England 



before the end of May, or the beginning of June ; in the 



south it arrives a Aveek or two earlier. It leaves us affain for 



warmer cKmates in August, a month or six weeks previous 



to the departure of the Swallows. In this country it haunts 



* Since the publication of the first edition of this volume, a specimen 

 of the Alpine Swift {Cypselus alpinus), was sent to me by William Sin- 

 clair, Esq. of Belfast, which was killed within eight or ten miles of the 

 south coast of Ireland. Mr Sinclair thinks it probable that the species 

 annually resorts to that part of the island, but as such a fact has not been 

 ascertained, I only thus casually mention it. 



