PROCEEDIXGS OF THE XATfOXAL MTSEFM. 



507 



eiglitli or seventh. In the specimens of Rhamphocoelus iMsserini., Tan- 

 a<jra (laririiti, and Tancujtui palmanim. whicli were examined with Proe- 

 nia.'i for comparison, the arrangement was (piite dilfercnf, liliumphocivluH 

 having the ninth abont ecpial to tlic first and second, and mncli shorter 

 than tlie sixtli, which was tlie longest; the two Taiiagras had the sixtli, 

 seventh and eiglith abont ecpial. tlie ijinth shorter and abont ennal to 

 the lifth. 



''In tlie arrangement of the feathers of the head, Procnias differs from 

 most Passeres by having several of the rows on the posterior part of the 

 crown on each side widely sepa- 

 rated, thns farming a pecnliarly Vv:;;/ . Vz-'v/;-' ;;:;:/> 

 nnirked longitndinal pattern. .>;: ■••.•.;.■ "•■;■•■■ 

 This arrangement is, however, i;:j w;^/ |; 

 probably dne to the increased ^ K 'ii 

 width of the head, which is nnich . I y^ f. 

 the shape of a swallow's; the ;^ :; ,4. :•:■; .:••. 

 same arrangement, dne to proba- ^^-rA .;:::::•. o:::r 

 bly the same cause, is carried to •;•.:::•' ■^:-:':^'y:- •■•.''•V 

 the. extreme in the Caprlmulgi. • Xv: ■••;■;■// ';;::•: 



"The form of tlic dorsal tract is " y^yC: ''^} i\-:} 



very different from that of i»*y/^/7»- ^ -yiA .(;;;:; '■■:-:.j^ , 



phoc(t'his or Taiiafira, all of which 

 are figured to showthevariations. 

 It is a little like T. palmarum, or 

 Certhiola as ligured by Lucas, ^ 

 but the diamond-shaped dorsal 

 tract is longer and nearer the 

 middle of the back. The ventral and femoral tracts were destroyed in 

 making the skin, and no proper conception could be formed of the cervi- 

 cal or sternal tracts, as they were twisted and crowded all out of shape. 



"There is nothing in the i)terylosis of Chlorophoiiia to indicate any 

 relationship to Prootiasy but on the other hand there is a decided 

 resemblance to Tana<ira pahnarum. In fact, the only difCerence from 

 that species worth noting is the smaller size of the dorsal tract, the 

 shape being a[)parently the same. 



"The pterylosis of rrociiias is evidently ])asserine, but shows no par- 

 ticular leaning toward any group, and seems to differ sliglitly from the 

 tanagers, witli wliicli it has hitherto been classed. As far as pterylosis 

 alone is coiu-erned, it may be placed anywhere among the Passeres, but 

 not too far from the warblers, linches, or swallows." 



a b c il 



Fig. 5. 



DORSAL TRACTS. 



((() I'rocuias tersa ; (6) Tanagra darvvini; («) Tana- 

 gra palmarum ; (d) lihampliCElus iiasserini. 



Tw,.-l!iink natural si;-.i-. 



' Proc. U. S. Nat. Mus., XVII, 1894, p. 303. 



