892 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Page. 335: In last line, for Sclater read Sclater. 

 Page 338: To list of genera not seen by the author of the present 

 work add: 



Jdioptilon Berlepsch (Proc. Fourth Int. Orn. Cong., Feb., 1907, 356; type I. roihs- 

 childi Berlepsch), and Xanthomyias Berlepsch (Proc. Fourth Int. Orn. Cong., Feb., 

 1907, 490; type, Muscicapa virescens TemmincJ^;). 



Page 338, footnote a: For general read genera, and for Lipangus 

 read Lipaugus. 



Page 339, footnote a: The genus Lawrencia, which has been found 

 to be a member of the Oscines, instead of belonging to the Tyranni- 

 dse, having been omitted from its proper place in, or at least near, 

 the VireonidiTP (treated of in Part III, pp. 128-232, of the present 

 work), the characters of the genus and single known species are given 



below : 



Genus LAWRENCIA Ridg^A^ay. 



Lmvrenciaa Ridgway, Auk, iii, no. .3, July, 1886, 382. (Type, Evipidonax nanus 

 Lawrence.) 



Resembling the smaller and more slender species of the genus Vireo 

 Vieillot (especially T^. pusiUus Coues), but bill much broader and more 

 depressed basally, its width at frontal antise equal to distance from 

 nostril to tip of maxilla and more than twice as great as its depth at 

 same point, and rictal bristles stronger. 



Bill about half as long as head, broadly triangular in vertical profile, 

 its width at frontal antia? more than twice its depth at same point, and 

 equal to distance from nostril to tip of maxilla; culmen nearly straight 

 to near tip, where slightly decurved, the tip of maxilla very slightly 

 uncinate; gonys faintly convex, much longer than mandibular rami; 

 maxillary tomium nearly straight, distinctly notched subterminally. 

 Nostril exposed, rather large, longitudinally oval, with broad mem- 

 brane above for whole length and below for basal half. Rictal bristles 

 (two or three) strongly developed, the bristly tips to leathers of chin 

 and frontal antise distinct, the latter extending much beyond nostril. 

 Wing moderate, much rounded, the primaries exceeding secondaries 

 by not more than distance from nostril to tip of maxilla; seventh and 

 sixth primaries longest, the fifth and eighth successively a little 

 shorter, the ninth shorter than first, the tenth (outermost) a little 

 more than half as long as ninth. Tail as long as wing from bend to 

 end of secondaries, slightly double-rounded, the rectrices rather nar- 

 row. Tarsus rather long and slender (about twice as long as exposed 

 culmen and one-third as long as wing) ; middle toe, with claw, much 

 shorter than tarsus, its basal phalanx and nearly half of second pha- 

 lanx united to outer toe, the former almost wholly united to inner toe ; 



a In honor of Mr. George Newbold Lawrence. 



