PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 337 



(Eastern Mexico), Panama, Bogota, and Eastern Pern, I am unable to 

 detect difterences other than what appear to be chiefly of an individual 

 character, though there is much variation both in size and colors among 

 the different specimens. 



OCSCRIPTIOIV OF A NEW FLY-CATCHER AND A SIJPJPOSED NEW 

 PETRFL. FROm THE SANDWICH ISIiANDS. 



By ROBERT RID01%^AY. 



Chasiempis sclateri, sp. nov. 



Sp. ch. — Above dull ferruginous, more umber on the back, more ru- 

 fesceut on the rump and upper tail-coverts ; sides of head and neck, 

 chin, throat, and breast bright ochraceous- rufous ; rest of lower parts 

 pure white, the sides tinged with rufous ; wings and tail dusky, the 

 middle and greater coverts tipped with pale ferruginous, producing two 

 distinct bands ; secondaries edged with pale dull rusty ; inner webs of 

 rectrices (except middle pair) tipped with white, this about .40 Df an 

 inch wide on the lateral pair and decreasing in extent toward the inner 

 feathers. Wing, 2.70; tail, 2.70-2.75; tarsus, .95-1.00; middle toe, .45. 



Types, Nos. 41955 and 4195C, coll. U. S. Nat. Mus., Waimea Kaui, 

 Sandwich Islands ; V. Knudsen. 



Although I have been unable to compare the specimens described 

 above with either C. sandwichcnsis (Gin.) or G. dimidiata (Hartl. & 

 Finsch), I am satisfied, from reference to the descriptions of these in 

 Sharpe's catalogue of the Muscicapidw ("Catalogue of the Birds in 

 the British Museum," vol. iv), pp. 231-233, that it is quite distinct spe- 

 cifically. The former is described as having the " wing-coverts black, 

 tipped with white spots," the " under wing-coverts white," the cheeks 

 and throat white, the tail only 2.15 inches in length, and the tarsus only 

 .85 long ; while the latter is still more different both in proportions and 

 colorations. 



Cymochorea cryptoleucura, sj), uov. 



Sp. ch. — Adult: Uniform fuliginous, the head and upper surface more 

 slaty, the greater wing-coverts and outer webs of tertials paler, inclin- 

 ing to dull ash-gray; remiges and rectrices dull black, the latter (except 

 middle pair) white at the base; upper tail-coverts white, the loyiger 

 feathers broadly tipped with Uaclcish (as in Procellaria pekuiica) ; anal 

 region mixed with white, and white of the upper coverts extending 

 laterally to the sides of the crissum. Tail only sliglitly forked or emar- 

 ginated, the outer feathers being only about .20-30 of an inch longer 

 than the middle pair. Bill, legs, and feet (including webs) deep black; 

 wing, 5.80-6.30 ; tail, 3.00-3.15 ; bill (measured in straight line from base 

 of culmen to point of the maxilla), .00; tarsus, .85-.90; middle toe, with 

 daiv, .85-.90. 



Proc. l!^"at. Mus. 81 22 March 29, 1 8 83. 



