1-^7.] I'UOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 541 



taiued from Bolivia through Bridges. The latter locality has heretofore 

 been regarded as correct, but is very doubtful ou account of the autheu- 

 tic speciineus uow before me." — (Finscii; translation.) 



8. Psittaciila iiisularis, sj). nov. 



(Tres Marias Passcriue Parrot.) 



Psitfacitla ci/anopt/ffa Finsch, Abh. Nat. Brem., 1870, ^553 (Tres Marias.) — Lawr., Pr. 

 Bost. Soc. N. H., 1871, 270 (do.). 



Sp. CHAR. — Similar to P. cyanopygia^ but larger and darker. 

 Habitat. — Tres Marias Islands, western Mexico. 



Adult male: "The old male corresponds exactly with the description 

 given by me (l. r.)." Cf. Mou. Papag. 



Young male, transition plumage : " Shows on the rump and under wing- 

 coverts only a.few turquoise-blue feathers; primary coverts and second- 

 aries are blue with green outer margins; the greater coverts still green, 

 like the rest of the upper side of the wing; bill horn-white,with brownish 

 gray base." — (Finsch ; translation.) 



Adult female (type, N"o. 37347, Tres Marias, January, 18G5; Col. A. J. 

 Grayson): Above clear parrot-green, much brighter or inclining to 

 Paris-green on rump, upper tail-coverts, and tail; lower parts deep ap- 

 ple green. Length (skin) 5.75, wing 3.50, tail 2, culmeu .55, depth of 

 bill at base .58, tarsus .52, inner toe .58. 



Another adult female (No. 39973, same locality and collector) is simi- 

 lar in coloration, and measures as follows: Length (skin) 5.00, wing 3.50, 

 tail 1.80, culmen .55, depth of bill at base .58, tarsus .48, inner toe .55. 



I have not been able to examine adult males of this insular form, and 

 have therefore been obliged to translate what Dr. Finsch says concern- 

 ing that sex. It may be remarked, however, that the specimen de- 

 scribed by him in his monograph, with the description of which he says 

 the adult male of the Tres Marias bird agrees, is of unknown locality. 



That Colonel Grayson was aware of the difference between this form 

 and that of the mainland, is shown by the following quotation from his 

 " Natural History of the Tres Marias and Socorro" (p. 271) : 



"There is a closely allied species ou the main-land from which the 

 Tres Marias variety differs in its larger size, especially of the bill, and 

 in its deeper green color ; the bill, also, is darker at the base, that of 

 the main being entirely white.* The general appearance of the plu- 

 mage is lively green, rump in the male violet blue."t 



Mr. Lawrence, however, did not consider the differences sufficient to 



*Tliis distinction becomes lost in dried skins. — R. R. 



tThis last statement may have been written from memory, since FiNSCn describes 

 the Tres Marias adult males (probably obtained from Colonel Grayson) as having the 

 rump turquoise-blue. 



