320 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



RALLUS LONGIROSTRIS LONGIROSTRIS Boddaert 



Guiana Clapper Rail 



Rallus longirostris Boddaert, Table des planches enlumincez d'histoire naturelle, 

 p. 52, 1783, after Dec. 1 (based on Daubenton, Planches enluminees d'his- 

 toire naturelle, pi. "849. Rale a longubec [sic], Buff. XV, p. 251" [ = "Rale k 

 long Bee de Cayenne" Daubenton, Planches enlumindes d'histoire naturelle, 

 pi. 849; Le RSle a Long Bee, Buff on, Histoire naturelle des oiseau.x (ed. 

 Deux-Ponts), vol. 15, p. 251; orig. ed., vol. 8, p. 163, 1781 (Guiana)]). 



Subspecific characters. — Size relatively small; bill relatively stout; 

 upper parts moderately dark and grayish; lower surface light; the 

 wliite bars on flanks broad and close together; sides of head light 

 brownish; little grayish on foreneck. 



Description. — Adult, U.S.N.M. no. 70685, Demarara, British Gui- 

 ana. Pileum and liind-neck broccoli brown, in places somewhat 

 rufescent, mixed with grayish feather edgings, wliich posteriorly 

 impart a streaked appearance; back and scapulars with the feathers 

 centrally deep sepia brown, marginally lighter and dull gray; rump 

 and upper tail-coverts grayish olive brown, the feathers with sepia 

 shaft markings; tail grayish olive brown, the rectrices bister brown 

 centrally; wing-quills bister, the outer edges, together with the 

 superior %vdng-coverts, lighter, the inner coverts washed with grayish, 

 the outer ones cinnamon; alula light bister, the outer web of outer- 

 most feather margined with cinnamon; sides of head and neck dull 

 ochraceous gray, posteriorly darker and indistinctly streaked with 

 pale brownish gray; supraloral stripe paler, a lengthened spot on 

 lower eyelid dull bufFy wliite; chin and upper throat dull pale ochra- 

 ceous buff; center of lower throat, whole of jugulum, and breast 

 light cinnamon; abdomen dull cream white; sides of body and flanks 

 rather dark grayish brown, rather broadly barred with white; under 

 tail-coverts white, all but some of the longest barred with grayish 

 brown; lining of mng grayish brown, barred narrowly with wliite; 

 thighs on outer side drab gray, on inner side dull grayish white partly 

 barred with drab gray. 



Measurements. — Adult male*: Wing, 133-142 (average, 137.5) mm; 

 tail, 52-59 (55.5); exposed culmen, 54-55 (54.5); height of bill at base, 

 11-13 (12); tarsus, 46.5-47.5 (47); middle toe without claw, 42.5-43.5 

 (43). Adult female ^: Wing, 126-131 (average, 128) mm; tail, 47- 

 57.5 (52.7); exposed culmen, 46-53 (49.3); height of bill at base, 11-13 

 (12); tarsus, 42.5-47 (44.2); middle toe without claw, 41-44 (41.9) 



Type locality. — Cayenne, French Guiana. 



Geographic distribution. — Permanent resident from British Guiana 

 to northeastern Brazil. 



Remarks. — The bill in this race is apparently stouter than in any 

 form of the species except Rallus longirostris crassirostris. The few 



* Two specimens, from Guiana and Brazil. 



« Four specimens, from French Guiana, British Guiana, and Brazil. 



