ALAUDID^l. CLXIV. 275 



867. C. virens (L.). WOOD PEWEE. Rictal bristles half length 

 of bill ; wing bands whitish or rusty ; olive brown above ; pale or 

 yellowish below ; lower mandible usually pale. L. 6^. W. 3^. T. 

 2f . B. ^. U. S., very abundant ; known from the common Pewee 

 by its drawling notes. (Lat., greenish.) 



868. C. richardsoiii (Swainson). Darker and less olivaceous, 

 more gray below ; bill dusky below. L. 6. W. 3. T. 2f . N. W., 

 E. to Wis. ; nearly like the preceding, but the notes and nesting 

 different. (To John Richardson.) 



457. EMPIDONAX Cabanis. (e/zTri's, gnat ; ai/a, king.) 

 a. Lower parts distinctly yellow. 



869. E. flaviveutris Baird. YELLOW-BELLIED FLYCATCHER. 

 Clear olive green ; yellow below, becoming bright yellow (not 

 merely slightly yellowish as in the others) on the belly ; first pri- 

 mary about equal to sixth ; feet as in acadicus ; bill yellow below. 

 L. 5. W. 2f. T. 2. B. %. Ts. f. E. N. Am. (Lat., flav us, 

 yellow ; venter, belly.) 



aa. Lower parts not distinctly yellow. 



870. E. virescens (Vieillot). SMALL GREEN-CRESTED FLY- 

 CATCHER. Clear olive green, wing bands buffy ; whitish or slightly 

 yellowish below ; yellowish ring about eyes ; bill pale below ; pri- 

 maries nearly an inch longer than secondaries ; 2d, 3d and 4th pri- 

 maries nearly equal, and much longer than 1st and 5th ; 1st much 

 longer than 6th. L. 6. W. 3. T. 2|. Ts. f. Tel. \. B. f. 

 E. U. S., frequent. 



871. E. trailli (Audubon). Olive brown, duller than preced- 

 ing ; bill pale below ; 5th primary about as long as 4th, 1st not 

 much longer than 6th; middle toe length of tarsus; longest pri- 

 mary | inch longer than secondaries. L. 5|. W. 2|. T. 2. 

 B. -|. Ts. f . Tel. f. U. S., represented E. by var. alnorum 

 Brewster. 



872. E. minimus Baird. LEAST FLYCATCHER. Olive gray; 

 bill blackish below ; wings like preceding, but longest primary but 

 \ inch longer than secondaries ; middle toe half as long as tarsus ; 

 tail slightly emarginate. L. 5. W. 2. T. 21. B. \. Ts. f. 

 E. N". Am., abundant ; very similar to the last, known by the meas- 

 urements. (Lat., least.) 



FAMILY CLXIV. ALAUDID^J. (THE LARKS.) 



First primary very short or obsolete. Tarsus obtuse and scutel- 

 late behind as well as in front (a character singular among Oscines). 

 Bill short, of various forms in different species; nostrils concealed 

 by tufts of antrose feathers ; hind claw very long and nearly straight; 

 inner secondaries lengthened and flowing. About 100 species, 



