61 



PTEEOCLES AKENAKIUS. 



(BLACK-BELLIED SAND-GROUSE.) 



Tetrao arenaria, Pallas, Nov. Com. Petrop. xix. p. 418. pi. 8 (1774). 



Sand-Grouse, Latham, Syn. iv. p. 751 (1783). 



Tetrao fasciatus, Desfont. Mem. de l'Acad. des Sc. p. 502 (1787). 



Aragonian Partridge, Lath. Syn. Suppl. p. 223 (1787). 



Tetrao arenarius, Pall., Lath. Ind. Orn. ii. p. 642 (1790). 



Perdix aragonica, Lath. torn. cit. p. 645 (1790). 



Pterocles arenarius (Pall.), Temm. Pig. et Gallin. iii. p. 240 (1815). 



(Ems arenaria (Pall), Vieill. N. Diet. xii. p. 423 (1817). 



Ganga unibande, French ; Cortisol, Barriga-negra, Portuguese ; Corteza, Ortega, Churra, 

 Churra Manchega, Spanish ; Koudhre, Arabic. 



Figurce notabiles. 

 Pallas, I. c. ; Temminck, PL Col. 52, 53 ; Werner, Atlas, Gallinaces, pi. 9 ; Fritsch, Vog. 

 Eur. taf. 32. figs. 9-13 ; Naumann, Vog. Deutschl. taf. 153 ; Gould, B. of Eur. p. 257. 



cj ad. pileo, nucha et collo postico pallide cserulescenti-cinereis : dorso, scapularibus, uropygio et tectricibus 

 alarum minoribus ockrascenti-aurantiacis grisescente nigro variegatis, uropygio saturatiore ; remigibus 

 saturate cinereis, rhacbibus nigris, primario primo in pogonio externo brunnescenti-cinereo, primariis 

 intimis vix albido apicatis : secundariis in pogonio externo ocbrascenti-aurantiaco notatis, intimis 

 nonnullis scapularibus concoloribus : tectricibus alarum majoribus fere totis flavicariti-aurantiacis : 

 Cauda, brunnescenti-cinerea, brunneo indistincte fasciata et albido terminate : gula rufescente, mento 

 pallidiore, colli lateribus rufescenti-aurantiacis, gula ima macula magna, nigra notata : jugulo et 

 pectore cinerescenti-margaritaceis vix isabellino tinctis, pectore linea nigra transfasciata : abdomine 

 nigro : tarsi plumis pallide cervinis : subcaudalibus flavicanti-albidis : subalaribus et axillaribus albis. 



2 ad. corpore supra ochrascenti-arenaceo, nigro fasciato : pileo, nucha et collo postico nigro striatis : remigibus 

 saturate brunnescenti- cinereis, secundariis extimis ad basin isabellinis nigricante marmoratis, secundariis 

 intimis et tectricibus alarum dorso concoloribus, sed tectricibus majoribus valde ochrascente aurantiaco 

 terminatis : gula, ochrascenti-flava, ima nigro transfasciata : gutture imo et pectore superiore rufescenti- 

 ochraceis nigro guttatis, pectore in parte inferiore linea nigra transfasciato : abdomine et corpore imo 

 subtiis nigris : tibiae et tarsi plumis sordide et pallide ochraceis : subcaudalibus albidis, subalaribus 

 albis. 



Adult Male (Ludjak, 24th June). Crown, nape, and hind neck pearl-grey, with a faint ashy tinge; back, 

 scapulars, lesser wing-coverts, rump, and upper tail-coverts variegated greyish black and orange clay- 

 colour, the feathers being at the base clay-orange, marbled with blackish, towards the centre crossed 

 by a broad bar of greyish black, and finally broadly tipped with rufescent ochraceous ; rump rather 

 darker than the rest of the upper parts; quills bluish grey, shafts black, the first primary with the 



