( 12 ) 

 -". Pachysylvia aiirantiifrons saturata ikhu. uov.* 



Ilylojihiltis i/milarif (nee Sclater 1) Li'otaud, Oi.s. Trinidad, p. 186. 



//. amimtiifrons (nee Lawrence !) Chapman, Bull. Amei: Muh. vi. (1H'J4;' p. 21 (Trinidad). 

 Piii-hy^ijhiu aiimutiifi'iii.i hyjioj-aiithu (nee Pelzeln !) Ridgway, BinU X. and M. America, iii. (11104) 

 p. 215 (Venezuela, Trinidad). 



Eight £?(? and ? ? from Oaparo, April arid May. Tlicy agree with a series of 

 14 sjieciiuens from the vicinity (if Ciimana, the dift'crences mentioned by Jlr. Kidgway 

 being ajuiarentiy not constant. 



Professor Allen, as well as Count Berlepsch and Mr. Hartert, have conclusively 

 shown that P. auranfiifrons and P. wutkuuihi are spei-ifieally distinct. 1 have 

 now before me a series of both from near Cumana. 



P. (iiircHtnfroHs is at once distinguishable by Laving the foreliead and lores 

 light yellow, the ear-coverts and sides of the neck pale rufous isabelline, and the 

 lower surface clear yellow. In P. f. acaticauda, on the other hand, forehead, lores, 

 sides of the Iicad and lower j)arts are uniformly liufly brownish. (Jenerally, there is 

 no trace of yellow on tlie under surface, but some specimens from tiie Orinoco 

 (Maipures, etc.) have the flanks slightly washed with yellowish, thereby apjiroaching 

 P. f.Jlaripoi (Lafr.) from Bogot.i. 



As pointed out by Mr. Kidgway, the yellow-bellied form, inliabiting N.E. 

 Venezuela and. Trinidad, differs from tyjiical /'. luifdiiHifiom aKiantii/rons (Lawr.) 

 in having the cliest distinctly washed with ochraceous or butfy. It is, however, 

 ipiite distinct from /'. li>/poxantha (Pek.), with which it has been identified by 

 the same author. The typical specimens in the Vienna Museum are readily 

 distinguishable liy the following characters. Head above and back are dull sepia 

 brown, only the rump and upjier tail-coverts being pale green ; the sides of the head 

 and neck dark brownish (not rufous isabelline) ; no trace of yellow on forehead 

 or lores ; whole lower surface uniform pale yellow without any ochraceous wash on 

 the chest, the latter being greyish yellow, sliglitly flammulated with brighter yellow. 

 In the coloration of the upper parts, and in lacking the yellowish tinge on the 

 ibrehead and lores, the types of P. hijpoxantha. agree exactly with those of 

 P. fuscicapillu (Sd. & hialv.) (ex Eastern Ecuador), but the latter differ in having 

 the lower parts (except the dirty whitish throat) much darker, deep greenish yellow. 

 I am, however, not certain wjiether this difference will hold good when a larger 

 series of both races is compared. For the present, the following species and sub- 

 species ought to be recognised : 



1. P. aura lit a fro itx anntHtiifroiis (Lawr.). Panama to Santa Marta. 



2. P. ainaiitiifronK saturata Hellm. Nortliern coast of Venezuela, from 

 San Esteban to Cumana and Trinidad. (The locality " (iuiana" is erroneous, the 

 so-called Guiana skins being of the well-known "Orinoco" make.) 



o. P. hi/jioxaiitlia h'ipoxantka (Pelz.). North Brazil : Kio Icanna and 

 1!. A'anjie, tributaries of the njijier Rio Negro. 



4. P. h;! poxaiithu J'ii»i:irapilla (Scl. it Salv.). East Ecuador : Sarayac;u. 



2 1 . Tachycineta t albiventer (Bodd.). 



Hiriimlo nlljirenler Boddaort, Tuhl. PI. eiil. (178a) ]). 31' [luiscd on Daubenton. /'/. rid.lah.bi6. 

 fig. 2. — Cat/i'iiw], 



One ? ad. from Seelet, April. •• Iris brnwn." Identical witli examjiles from 

 British (iuiana and Cayenne, only the bill being rather larger. 



* TjiK ; .Muj. Tring, No. il7*S, Caracciolo coll. '■ 5 " a4., San Antonio, Cuniami, .Marcli Isth, 18it8. 

 t There is not the slightest ground for separating this species gcnerically as IridljinnHe. 



