THERMOCHALCIS. — CAPRIML'LGUS, 3G7 



JS'est. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana, 



liange in British Guiana. Mount Rorainia, 5000 ft. [WhiteJij). 



J^.vtraliinital Range. Venezuela, C^olombia, Ecuador, Peru. 



Hahits. Schoniburi/k states (Reis. Guian. iii. p. 710) that he 

 found this species on the Rorainia Mountains up to an altitude of 

 ..5000 ft. Its mode of life and habits are the same as those of 

 other Nightjars ; its favourite haunts are low bush, fissures in the 

 rocks, and amonfrst boulders. 



Genus CAPRIMULGUS Linn. 



Cajjrivmlgus Linne, Syst, Nat. 10th ed. i. p. 193, 175S. Type C. 

 euro2)ceus Linn. 



This oenus is distinguished chiefly by the absence of any orna- 

 mental })lumes in the wings or tail, the wings being usually 

 pointed in shape and the tail generally rounded at the tip ; the 

 pale markings on the head are almost always longitudinal. 



Key to the Species. 



A. Throat and superciliary streak rufescent 



buff ; a rufous collar on the hind-neck... C. maculicaudiis, p. .367- 



B. Throat-patch white, no buff su])erciliary 



streak, and no collar on tlie hind-neck. 



a. First and second primary-quills crossed 



by a white bar, remainder of pri- 

 maries uniform ; mider tail-coverts 

 buff C. whHelyi, p. .3GS. 



b. Fii'st pi'imary uniform dark brown, the 



second and third have a white spot on 

 the inner web, and fourth a Avhite spot 

 on both webs ; under tail-eoverts dark 

 brown narrowly l)arred witli buff C. n/'r/rrsmis-, p, .369, 



241. Caprimulgus maculicaudus. 



Stfnopais mnnilicdiKhis Lawr. Ann. Lvc. New York, vii. ]>. l-')9. lS(il2 



(Paraj. 

 Capri>nul(/iis maciiI/cdinJiis Brabounic i*v: ('hubl», B. S. Amcr. i. ]>. lOl. 



no. 9(30, 1912. 



Adult feniale. Crown of bead black ndnutely (h)llcd wiih bud"; 

 back, wings, and tail (hirk brown mottled, spotted, and liarredwith 

 rufous or bufly-white ; scai)ulars black, outer niai'gius bull'v- 

 white ; a rufcjus colhir on the hind-ne(d< ; superciliarv lino bufly- 

 white bari'cd or (l(ttl(!d with bhick ; throat rufous with bhudv bases 

 to the feathers; unih-r winL!,-covcrts '^indlar ; lircast bai-red or 



