BIRDS—ANATINAE—ANAS, G73 
Comparative measurements of species. 
Oatal . Species. Locality. Sex. |Length. Stretch | Wing. | Tail. | Tarsus. | Middle Its claw) Bill Along | Specimen 
No. | of wings. toe, alone. | above. gape. |measured. 
| | | 
872 | Anas baschas..........| Carlisle, Pa........| @ 20430):|esceees | J0s82 4.06 Skinvsses 
GOs eine cnns AO 'sscnes ceerererlscccesdOscoosscccee: foesses| 22,75 | 37.00 | 11.00 |oserecs. Fresh.... 
B73) |PNabicandOvneoracee Me dOere acs were Q | 20.30 )........] 10.60 | 4.94 Skin..... 
Ome Keracvaisies Os) ssistse . sateen OO) 5e00 ate asbiaiete . 22:25 36.50.) 12.00, |....050. Fresh.... 
231 | Anas obscura...... cece faccoaedOee a 22 00 | aieéu ewer 11 46 4,70 | Skin..... 
847 |.. dO cesccccees aisiain || Se asi’ dovryees @ccees Q IOTEO)| Biowe tare 10.50 4.16 Skin..... 
cles Geepcigee dO ..eeeeee eoveeeleceees CO. saceccoeses [sevens 33005) «96225: 1 10050" i cecsecies Fresh.... 
10332 | Dafila acuta ....... s..feee praUOusceinercest || G1 9S0:00 ledeseces(f11.00) || 8.60 Skin..... 
NSIS) 0 cs\ees Onaslas ewer «aed | secant dOiesoete econo Opal 18090) | o25 ace 9.70 | 4.62 Skin..... 
9725 | Nettion carolinensis... | Camp 118, Bill W. F.| 14,00 teee0ese-|) 7.40 3.42 Skin..... 
GOs eriesive so A0sisins ee c|eeines sds soccncccese fsceses| 14.00) 2500 eesedcce|cacsicees . Fresh.... 
9728) | v6<ice d0vcce Boca Grande, Mex. |++++*:| 13,20 |....0.6.| 7.10 3,52 Skin..... 
do. | Nettion creeca... Gsivies AOsinccmsisenvnn [eeees 1S.,00)|/ 29500) |.cisissiess|laae= iste Fresh. .... 
1200 | Querquedula discor: Michigan .... eseeee 3 15.40 |..... 7:10 3.06 Skin..... 
T2OM ie ag ont cdOsss os ence anaes] aeicsacdGensedecccews Q | 15.80 |........} 6.90 | 2.66 Skin..... 
4458 | Querquedula cyanoptera| San José, Cal...... 3 17.80 Jeaes ‘sias)) 0200 3.80 Skin... 
A459) Sis sare UOtvastacteveecens Q 1G-20+|fSecccae| 722089] 3.52 Skin..... 
925 | Spatula clypeata. ref 18.50 eee| 9.70 3.80 SKinvecee 
GOs: Ilo esie view dO: oe eee 20.00 | 32.25] 9.50 |........ Fresh.... 
2524 .do. Q | 19.30 }........] 9.20 | 3.94 Skin. 
Org |eaicre e's do Sesis' eaten (CO 'eeniores, eoeees [sees 20025) alata) (9250) | cams ses Fresh.... 
1783 | Spatula maculosa......| South America .... |ereees 20.00 }....60-.| 8.50 4.44 Skin..... 
9768 | Anas strepera..........| Bodega, Cal........ 3 D200! pecans en ilOT50 3,96 Skin..... 
ASBO! |"PSeasssd0's aac eccavcess San José, Cal......| Q | 19.20]........| 10.10 | 4.20 Skin...., 
1310 | Mareca americana.,... Carlisle; Pa....0a. 3 20,90 |.) Si %e.| J/1.00 5.24 Skin..... 
do. |ossevees GOs csuiicecsselicns 00+ dO. seccsseee ee feceses| Q1.75 | 35,50 | 11.00 |....c00.[ecceeess | stoi sieisisfe Jeceeseee |ereisiojsiee's)'Z sje see) EEKESHs 00,5 
DEG lisisieresians GOscccsescenvacs Se siietOsiesiaaeaielesias Q PPA Bion Sr 9.60 4.54 1.44 1.82 0.33 1.34 1.54 | Skin..... 
10376 | Mareca penelope....... Jove «+0. secerceees fof 20.00 ie esses} 10,60 5.14 1.52 1.99 0.34 1.44 1.64 | Skin..... 
HOSS, | Aix: SPONSA- eee eee ois cis |/sej00i60 AOs nt snein owes Q V7500) | sislssieses|| -O-90) 4.90 1 36 1792 0.34 1.30 1.58 Skin..... 
L752 |lsle0is sce dO. ....cececcers| ceveesAOs sescacees fof 18200; Seance 9.20 4.50 1.40 1.90 0.32 1.36 1,54 Skin..... 
Copal [RGmctodaod CB RBoEeOcce Seed a g's 6 UO sche siwatsioesivisy eo ee.ci'| 19400) (0129). 50)1) 49156; | cc cmesienlseerewct lov esesee see 0 seae|cecnesec|sea- cee Fresh.... 
ANAS, Linnaeus. 
“Anas, Linnaeus, Syst. Nat. 1735. Type Anas boschas, L. (Gray.) 
Cu —Bill longer than the head or the foot, broad, depressed ; the edges parallel to near the end, which is somewhat acute. 
Nail less than one-third the width of the bill. Nostrils reaching to end of the basal two-filths of the commissure. Feathers of fore- 
head,jchin, and cheeks, reaching about the same point; upper angle of bill about in line with the lower, Tail pointed, about two- 
fifths the wing. 
The genus Anas embraces very large species, among them the original of the domestic duck. 
The characters of the two North American species are as follows : 
A. Ends of greater wing coverts white, tipped with black; speculum purplish violet, termi- 
nated with black. 
Head and neck green, succeeded by a white ring. Breast dark chestnut. Under parts and 
scapulars gray, finely undulated with dusky. Tail white, the coverts black... boschas, 
B. Wing black, the speculum purplish violet, tipped with black. 
Entirely dusky ; the head and neck brownish yellow, spotted with dark brown, which is 
uniform on the top of head and nape; sides of nape with a greenish gloss. No white 
anywhere except on the axillars and inside of WAG sss siseaselsiew'oe's te dagnecwshiee tig OUSCUTE, 
