REVIEWS AND BOOK NOTICES. 37 
specimens instead of two hundred, I should not be able to estab- 
lish as many species as are here allowed.” 
The species’ and varieties recognized are the following: 1., 
Myiarchus validus, known only from Jamaica. 2. M. crinitus, 
with three localized varieties, viz., crinitus, which ranges through- 
out the eastern portion of the United States and retires to Central 
America to winter; irritans (including Mezicanus and Yucata- 
nensis Lawr.), inhabiting Central and South America to Paraguay 
and distinguished with difficulty from var. crinitus; Cooperi 
(Tyrannula Mexicanus Kaup) confined chiefly to southern and 
southwestern Mexico. 3. M. cinerascens (Mezxicanus Baird), “ one 
of the better marked species of this difficult group” inhabiting 
southwestern United States and Mexico. 4. M. tyrannulus (feros, 
Swainsonii, Panamensis, etc. auct.) a homogeneous type, ranging 
over Central America and southwest to southern Brazil. 5. M. 
pheacephalus of Ecuador, suspected to be a local race of the 
preceding. 6. M. Lawrencei of Mexico and Central America. 
7. M. nigriceps, of Central and northern South America; though 
a tangible species, regarded as ‘“‘ simply a geographical representa- 
tive of M. Lawrencé.” 8. M. stolidus, a flexible species, with 
three insular varieties or local races: viz., stolidus, Jamaica, St. 
Domingo and Hayti; Phebe, Cuba and Bahamas; Antillarum, 
Porto Rico and Tobago, the. Porto Rican form being very strongly 
marked. 9. M. tristis, Jamaica. Not only have all these ‘‘ varie- 
ties ” ranked hitherto as species, but others reduced in this paper 
to synonymes have currently held similar rank. 
Preliminary to a revision of the species, the leading features of 
the genus are clearly sketched, as distinguishing it among allied 
genera. It proves to be a not sharply defined group, “ the genus 
so called ” resting ‘upon no structural characters, while its syno- 
nymes are among the vagaries of ornithology.” A few species 
usually relegated to other genera are shown properly to belong © 
here, and the genus as thus defined is susceptible of a tol- 
erably definite diagnosis. Before proceeding to an analysis of 
the species our author discusses other general matters relating to 
the subject, especially individual and geographical variation, and 
announces several propositions to which he invites serious consid- 
eration. The importance of some of these will warrant their 
repetition here as being an exposition of important facts and 
principles at present engaging the attention of ornithologists, and 
capable of wide application. 
