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DR. R. W. SHUFELDT’s MORPHOLOGICAL 
it also presents here and there in its economy traces of a Cla- 
matorial type, such as is shown in its free lacrymal bone and a 
few other minor points. I fail to find anything in its mor- 
phology that especially connects it with the Hirundinidce. As 
I anticipated, however, the brief synopsis of its structural cha- 
racters goes to show, in support of the views already elsewhere 
expressed by Garrod, that Ampelis has an organization of an 
average Osc-inine bird, by which I mean not typically so, and 
consequently will be of service here as an aid to comparison as 
we proceed. 
Osteology of Trogon mexicanus and Trogon puella. 
As will be seen by my tabulated list of material, I am indebted 
to Dr. Sclater for two excellent skeletons of these Trogons. 
He kindly had them prepared for me, and sent by post in ample 
time to use in the preparation of the present memoir. 
In my first paper upon the Macrochires, I stated that I 
wished to compare the skeleton of a Trogon with one of a 
Humming-bird (P. Z. S. 1885), as Forbes had found in them a 
peculiar structure of the palate, which led me to believe that 
there might be other points in the skeleton of one of these birds 
which would indicate some remote affinity perhaps with theTrochili. 
Hence it was with no little interest that I opened the package 
that Dr. Sclater had sent ; but my eyes had no sooner fallen upon 
the two neatly prepared specimens it contained, than the excla- 
mation was forced from me, “ Why, they are Caprimulgine 
Cuckoos ! ” 
How well this first impression will be supported by a careful 
examination of the skeleton in detail we will now see. 
In figuring the osteology of the Trogons, based upon these 
two specimens, I chose the skeleton of T. mexicanus for all my 
drawings. This I did as it no doubt agrees in all particulars 
with the skeleton of our own Trogon, T. ambiguus, and I have 
long been desirous of contributing to the knowledge of the 
osteology of that lone species of the genus in the United States 
avifauna. 
Practically, however, a description of the skeleton of Trogon 
mexicanus will answer very well for the skeleton of T. puella , for 
there is but very little difference between them. I must not, 
however, be understood to say that the difference in the skeletons 
