332 U. S. P. R, R EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
quill is longest ; the third, fourth, and first, successively, shorter. The tail is slightly emar- 
ginate; the lateral feathers very little shorter. The ash color of the crown does not extend 
beyond the occiput. The sides of the head and neck are lighter olivaceous than the back. The 
space around the lower eyelid is very little paler. The sides of the body are light olivaceous 
green; the under wing coverts and axillaries sulphur yellow. There are no whitish edgings 
whatever on the wings and tail ; externally they are margined with the green of the back ; the 
inner margins of the tail feathers similar, but lighter. There is no indication of a line of black 
feathers on each side of the chin. 
Specimens from Texas are smaller, but otherwise similar. The female is smaller than the 
male. 
There is a slight difference in the colors of the under tail coverts. These, sometimes, are 
almost entirely white, at other times with decided tinge of greenish yellow, as in 7570. In 
no North American specimens before me, however, are there any of the characters of Vireo 
bartramii, as given by Swainson. The proportions of the quills vary somewhat ; the first quill 
sometimes equal to and sometimes a little shorter than the fourth, but it is always decidedly 
longer than the fifth. The second and third quills are generally nearly equal; the former is 
sometimes the longer. 
List of specimens. 
Catal. |Sex. Locality. When eallecteal Whence ahaineas| Orig. | Collected. by— | Length. | Stretch | Wing. 
No. | No. of wings. 
ee eae ee || Se ee en tam, 
408: ||| gy,| Carlisle, Pas---—-==- May 1, 1844 | SiieBairde ese ssoee— | ne pet Petes VS 6.33 10.25 | 3.33 
TES) 6? sees dose ae see wane May 38, 1844 | weeees dOteteeaca conte s tocee eres seer ee 6. 50 10.50 | 3.50 
TEE Oy sees done ee eee eae doteaaas looeeee ployee ae pesond | sstetoeasccaches 6. 00 Cees || ve ale 
J6VAD: essai) CR Gig 10 ee 5 seca Saas | GoWurdémant.<|-22s2-\-2- = onc a eet oes s| aaa aoe eer ee | eee 
634g |p aem Rock portaOhio=sasee| pase! ana =a | Jo Ace nGl 5 ise alsssescackos cscs | becdcesd |Sesoesec|scocse 
OEM) |aanel) KERERIS 5 soe soee sells oceeoooecsS WeluteeBnyaness === een Vo tsb VWivetlee Sallosnocsesllassassce Seeace 
7510) |==-4|| Independence, Mo --|--==-----==2=-! Wm. M. Magraw.| 74 | Dr. Cooper. ----| 6.25 99,0, 3. 50 
WOU | eels Goss secae enn been ease eeseselea eee dos sta... ) OG Wes see dotscss2ae 5. 90 9.60) 3.00 
Sie | Peer MVVeSternulexast. =a. acl eee aera | Capt. Popes... oe | aseesa| Sean ean cee ons | oes ceea ts meee |noasee 
ARNG |lsseelbeaeod fa a ee gee ae Foe [inaae doses Meet eee Lee ta eae Coes ee ee 
68130 eDevilisiniver Mlexases ieee ames | Col. J.D. Graham| 16 | Jali Clankee==s 6. 00 9.50 2eito 
B049)/\--+| Guatemalass'- eer: Meese seein. Fe (te outdo cae 2 | tetas Se | ere er Acie 
VIREO FLAVOVIRIDIS, Cassin. 
Vireosylvia flavoviridis, Cassin, Pr. A. N. Sc. V, Feb. 1851, 152.—Is. VI; pl. ii. (Panama.) 
Sp. Cu.—Second and third quills decidedly longest—equal; first about intermediate between fourth and fifth, but considerably 
longer than the latter. Above very light yellowish green, The sides of the body greenish yellow, in strong contrast to the 
almost pure white of the under parts. The under tail and wing coverts and axillaries bright sulphur yellow. Crown ash color, 
bordered on either side by a brown line, below which is a bluish gray line from the bill over the eye to the side of the occiput ; 
a dusky line from the bill through and behind the eye. Length, 6 inches; wing, 3.25. 
Hab.—Northeastern Mexico to Panama. 
This species is of the same size with and somewhat similar to V. olivaceus, but may be readily 
distinguished by the much brighter and more sulphur green colors of the upper parts ; the 
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