320 SWA L LOWS.

l‘. ail/H's. but ‘* whole under portion and sides of head and neck. chest, sides, and flanks unit'orm sooty grayish brown, in marked contrast with pure white of belly, anal region, and under tail~eoverts. L., 7'60; \V., 5'50; T., 3'10” (lift/yum.

It‘d/Iotafifimuthern Florida south to ('uba and probably Central America,

destiny similar to that of 1’. sit/M's.

A common summer resident in Florida from Pasco County south- ward, arriving in March. It resembles 1’. subis in habits.

612. Petrochelidon lunifrons (Nay). CLIFF SwaLrow; EAYE SWALLUW. .-t¢l.—Forehead whitish, crown steel~blue, throat and sides of the head chestnut; a brownish gray ring around the neck: breast brownish gray, tinged with rutbus and with a steel-blue patch in its center; belly white; back steel-blue. lightly streaked with white; shorter upper tail- eoverts pale ra/‘mzs ,' tail t'useous‘. the feathers of nearly equal length. 1111.— Similar. but upper parts duller: throat blaek, sometimes mottled with white. 14., (5'01: \V., 41M: Tu 2'01; 1’). from 3",, '20.

[flew/(M'si'l‘he (.‘litl' Swallow may be known from our other Swallows by its rui’ous upper tail-coverts.

[fang/c *North America. north to Labrador, and. in the interior, to the Arctic Ocean; breeds throughout its range; winters in the tropics.

Washington, rare S. 12., Apl. to Sept. Sing Sing, common 5. R, May 1 to Sept. 12. Cambridge, S. l\’., much less common than formerly, Apl. 28 to Sept. 1.

Rest. of mud. generally retorti or poeket shaped. beneath elitfs or the caves of a barn or other building. [if/(Ix. tour to tire, white. with numerous spots of cinnamon—, oli\'e-, or ruteusdirown. '51 x '57.

During the nesting season these Swallows are of very local distri- bution. They will return your after year to their rows of mud tene— ments beneath the eaves of some barn or outbuilding. and, although familiar birds to residents of the immediate vicinity. they may be entire strangers to those who have never had a colony of these birds settled near them.

Like Barn Swallows. they are masons. and they may be seen on muddy shores rolling the, little pellets of clay which enter into the construction of their nest.

In the fall they are found in flocks with other Swallows, but at all times they may be readily identified by their pale rufous upper tail- eoverts, which make a conspicuous field-mark.

’l‘lie (‘l'nAN (‘Llrr S\\'.\i.i.ow (6/2.). Ith-oeiu-lidnn filler!) has been once recorded from the llry 'l‘ortugas, Florida (Scott, Auk. vii, 1590, p. 2155).

613. Chelidon erythrogaster (limit/.3. BARN Swarmow. .1111.— Forehead. throat. and upper breast ehestnut—rutims: rest (it the under parts washed with the same color: upper parts steel-blue; tail deeply forked, all but the middle feathers with white spots on their inner webs. Ian—Upper