572 U. Ss. P. R. R EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
Detailed measurements. 
| | Bill— Succession of quills from longest. 2 
| & o : =a 5 ] ] z 
| & e) | 2 3 | a 
5 = mires, las 2 | = 
= Locality. of 3} eo | 5 = a | = 
3 | | ° = z 5 % 3 9 2 F | 5 
Be | & zy r = a | 3 2 S:4] Des| ceo iSou| ealeDoalOxyiiteeg 18 3 
Ss | een epee | nS eb s | 5 2 Bone) ss ¢ | 4 | “3 
is | FA g El | 2 s 2 5 a = ba | | 8 
co = J 3 r= = = J A | 
5 | [esa | acepee lace | Oe sg) ees leg em nee eco a 
4515 Washington, D. ©.) fet 1Sva0ewciesse | 10.58) 6.88 | 1.84 | 1.84 | 0.53 | 1.52 | 1.42 | 1.61 | 0.56 | 4 | 3.5) 6.2 7| 8| 9] L|.e..| Dry... 
Motte edo iets Hos 21 15:58) 31280] 10560) 8050. stciue obcee eevee: | ecnaleee | enctes Bea | ele sabe a| Soe lS cles se (trea eBresne 
10314 | New Jersey...... fees 14,50 .....-| 10.30) 6.72 | 1.86 1.93 | 0.59 | 1.64 | 1.56 | 1.80 | 0.59 | 3 | 4.5) 2 6| 7] 8 | TL | 9/eDryAres 
LOST3)}|ertetarare Ossie cise Jemren| L480). sreceee 10.70] 6.45 |....0. 1.84 | 0.58 | 1.73 | 1.60 | 1.80 | 0.57 | 3.4) 5 | 2 BA evil BSE 49, hea Dry... 
3049 | Liberty county,Ga....| 15.60...... 10.44] 6.42 | 1.82 | 1.90 | 0.63 | 1.76 | 1.60 | 1.78 | 0.58 | 4 |*3.5) 2 Gil e7aless.| a9 Dry ise 
2B49 | inee- AO receccsies | Q T4210} eee ems 9.90) 6.00 | 1.71 | 1,84 | 0.54 | 1.50 | 1.42 | 1.66 | 0.57 | 3.45 | 2 63) 27) |e Ba 94) do] Dry... 
6530 | Indian Key, Fla..| é 15:20} sce0e0 10.40| 6.73 | 1.80 | 1.94 | 0.64 | 1.66 | 1.58] 1.90 | 0.57] 4 | 3.5] 2 63) 7) 78 9} 1| Dry... 
(il eeeoce donerneses lsot|bceane 330010200) secactll weet clececss|Mteessiellesesis (ees sti ssesenl| ea tee| accel ees|seeulcces|estd|ereel seer 50g 
| | | 
List of specimens. 
ae | 7 aa 7 oa - = = = a | ' = ae] ¥ 
Catal. No.| Sex. Locality. When collected. Whence obtained. Stretch | Wing. 
| | of wings. 
| | 
: | el 
4515 3 Washington, D:\C2<-222.-22 =<. Feb; —# 855-52 Markets2- i 3-222 once nese es |Somciae select 
10313 ue slsNewrlerscy icaseteaseaeces ces eaeeetsetreesaecis JeuOassintes: 2aae2 sone ses Bese =| See Pee 
| | 
AOSTA eee os saci. (iC ee eee me ee | BEAR Eos Soend 45 Se (6 Oo ee ee eS KOS Sao8 
3049 jb oooe8 Liberty county,/Ga.2.-22-+.2- <5 [eee tcc scetneas S.RyBaird./ sei Osteo. cee es |eeommenas | sereerae 
2849 | Q |------ dO Mee Se de sened eee [cceeeceecceeece eee (car ee a Pe ee 
6530 | Indian Key, Florida. ...--.--.- Heb:i3s Vebfes=- "Gy Wurdemann 222 2s -oeeeaee 33.00 | 10.00 
PICICORVUS, Bonaparte. 
Picicorvus, BONAPARTE, Consp. Av. 1850, 384. Type Corvus columbianus, Wils. 
Cu.—Lead color, with black wings and tail. Bill longer than the head, considerably longer than the tarsus, attenuated, 
slightly decurved ; tip without notch. Culmen and commissure curved ; gonys straight or slightly concave, as long as the tarsi. 
Nostrils circular, completely covered by a full tuft of incumbent white bristly feathers. Tail much shorter than the wings, 
nearly even or slightly rounded. Wings pointed, reaching to the tip of tail. Third, fourth, and fifth quills longest. Tarsi 
short, scarcely longer than the middle toe, the hind toe and claw very large, reaching nearly to the middle of the middle claw, 
the lateral toe little shorter. A row of small scales on the middle of the sides of tarsus. 
Without a specimen of Nucifraga conveniently at hand I cannot express exactly the difference 
between it and the present genus. Judging from descriptions, however, the bill is more 
curved, the culmen being decidedly convex ; the nasal feathers are longer ; the wings extending 
only to the middle of the tail, instead of near the tip. The very long wings distinguish it from 
all other American genera, except Corvus, which has a much thicker bill, &c., and is entirely 
black. The short tarsi and lengthened lateral and hinder toes are quite remarkable. The hind 
claw is rather longer than its digit. The sides of the tarsi exhibit the row of small scales seen 
in Corvus. The commissure is considerably curved, more convex than the culmen, which bends 
very gently throughout from the very base. There is a general approximation to the Sturnella- 
like bill more decidedly visible in Gymnokitta The nostrils are small, with the anterior portion 
less deeply bevelled off than in Corvus. 
