T •■If^'f 



PROONE. 



2S3 



ii 



Pii^opROGNE, Baird. 



... » 



Similar to Progne: the bill and legs weaker. Tail sliglitly forked, the 

 lateral feathers not attenuated, and tlio wing not reaching beyond its tip. 

 Plumage without the metallic luHtre of true Proijne. A narrow line of foathera 

 attached along basal half or twu-tliirds of the inner side of tarsus. 



The species of this group have been assigned by authors both to 

 Progne and Gotxjle, but dififer in som-) respects from both. To 



scattered blue-tipped feathers. A third, perhaps female, has no blue feathers 

 beneath. 



It is difficult to say what may be the color of the under parts in tlie adult male 

 bird. It seems as if a jugular or pectoral collar and the sides of body might 

 be «teel lilue, the chin and throat smoky brown, and the beliy nw\ ciissum 

 white, with more or less concealed dusky shafts to the feathers. Nothing like 

 this, ill adult plumage, however, is deaeribeii or known. 



Closely allied to the P, leucoyasler, this species diHers in considerably larger 

 size; paler, almost whitish chin and th-oat, tendency to steel baie on the 

 sides of breast and sides of body, etc. 



(No. "' 834.) Total length, 7.70 • wing, 5.40 ; tail, 3.20 ; depth of fork, .70 ; 

 differeiiCB between 1st and 9th primary, 2..')0 ; length of bill from forehead, 

 .49, from nostril, .34; along gape, .90; width, .60; tarsus, .58; middle toa 

 and claw, .84; claw alone, .26; hind toe and claw, .50; claw alone, .25. 



This is probably the same species as that referred to by Gray as P. doiwsiica ; 

 but without specimens from Paraguay, for comparison, I am unable to say 

 whether it is the true " doviestica," as based upon a description by Azara. 

 Burnieister (Reise La Plata, II, 477), in saying that the adult of domrstica, 

 from Paraguay, is entirely steel blue, has possibly confounded with ii the P. 

 eleyans, described on a previous page. I see no reason to believe that the' 

 white belly and crissum are ever wanting. 



