ALAUDIDA, — CLXIV. 275 
867. C. virens (L.). Woop Pewee. Rictal bristles half length 
of bill; wing bands whitish or rusty; olive brown above; pale or 
yellowish below; lower mandible usually pale. L. 64. W. 31. T. 
2%, B.4. U.S., very abundant; known from the common Pewee 
by its drawling notes. (Lat., greenish.) 
868. C. richardsoni (Swainson). Darker and less olivaceous, 
more gray below ; bill dusky below. “L.64. W. 3}. T.23. N. W., 
E. to Wis.; nearly like the preceding, but the notes and nesting 
different. (To John Richardson.) 
457. EMPIDONAX Cabanis. (emis, gnat; dvaég, king.) 
u. Lower parts distinctly yellow. 
869. H. flaviventris 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. 24. T. 23. B.4. Ts.2 E. N. Am. (Lat., flavus, 
yellow; venter, belly.) 
aa. Lower parts not distinctly yellow. 
870. HB. virescens (Vieillot). Smarty GREEN-CRESTED FLy. 
caTcuER. 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. 23. Ts. 3. Told. B. 2. 
E. U. S., frequent. 
871. HB. 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 2 length of tarsus; longest pri- 
mary % inch longer than secondaries. L. 53. W. 23. T. 24. 
B.3. Ts. 3. Tel. 2. U.S., represented E. by var. alnoruam 
Brewster. 
872. EB. minimus Baird. Least Frycatcuer. Olive gray; 
bill blackish below ; wings like preceding, but longest primary but 
4 inch longer than secondaries; middle toe half as long as tarsus ; 
tail slightly emarginate. L. 5. W.24. T. 24. Bi}. Ts. 2. 
E. N. Am., abundant; very similar to the last, known by the meas- 
urements. (Lat., least.) 
Famity CLXIV. ALAUDIDAS. (Tue Larss.) 
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, 
