112 



The tints are somewhat darker than in the United States' speci- 

 mens. 



24. Erythrospiza froktalis, Nob. Pyrrhula frontalis, Say. 

 Nob. Am. Om. 1. t. 6. f. 1. mas. 2. foem. Fringilla heemorrkoa, 

 Licht. Wagl. Isis, 1831, p. 525. Gornion, Mexic. Nocktotl, Her- 

 nand. Thes. p. 31. c. 81. 



This beautiful bird, reckoned until now very rare, and thought to 

 be peculiar to the Rocky Mountains, in districts far removed from 

 civilization , is very common in the city of Mexico, where according 

 to Mr. Paris it takes the place of our common sparrow, provoking 

 tlie science of the professors in the very yard of the university. 



25. Tyrannula coronata. S\v. T.fusca; capite, cristd erectd 

 rotundatd et corpore suhtus coccineis. 



FcEM. griseo-fiisca ; capite kevi concolore et pectore albidis ; ventre 



tantum sitbminiaceo. 

 Muscicapa coronata, Lath. BufF. PI. Enl. 675. f. 1. malė. Car- 



denul, Mexic. 

 Its Southern range extends to Demerara, ^vhere it is very common. 

 Contrary to what happens in the other species of the group, the fe- 

 male no\v described for the first time diflfers considerably from the 

 other sex. 



26. Tyrannula divaricata, Nob. T.cristata, cinereo-olivacea ; 

 mento orhitisque albicantihus ; dorso alisąue olivaceo-rtifescenti- 

 bus; alis acuminatis ; remigibns\™° tt 5^° subcequcdibus ; 2^°, 3"°, 

 et 4'° omnium longissimis ; caudd divaricatd corpore longiori 

 rectricibus guatuor mediis dorso concoloi-ibus ; diiabus hinc inde 

 nigricantibus, extimis duabus utringtie dimidiato-cinereis. Uos- 

 tro brevissimo rdgerrimo. 



Long. S"; rostr. 8'"; ai. 6"; caud. 4"; tars. V". 

 Riusito, Mexic. 



We have dwelt at greater length on the characters of this bird, as 

 it is likely to become the type of a new group. 



27. Laniūs Ludovicianus. Berduquillo, Mexic. 



A specimen with the two middle tail feathers only entirely black, 

 in ■vvhich condition it is most probably the L. excubuorides, Sw. 



When Mr. Swainson says, that he cannot reconcile the measure- 

 ments and proportions of the quills of L. Borealis and exaibitor, as 

 stated by me, he is perfectly right, and no one but myself can ex- 

 ])lain the reason : the fact is, that ■while coraparing I unfortunately 

 mušt have taken up a specimen of L. Italicus, Lath., instead of one 

 of the excubitor. Mr. Swainson has taken much pains to point out 

 Severai species of North American shrikes ; but we know only two 

 species of that genus in America, his L. Borealis and Ardesiaceus ; 

 \vhich latter, by the by, should be called Ludovicianus on our ac- 

 count, if not on Brisson's. 



28. PiPRA elegantissima, Nob. P. purpureo-nigra ; fronte cas- 



