MUSCA, MYA. 215 
putris, (maggot fly,) black ; wings white with a 
- black rib. Feelers and suckers like domestica. 
Deposits eggs, which become the common white 
skipper. - 
See Ms. P. 
2—2. Muscicapa. Spec. 97. 
striata, (fly-catcher,) green-ash ; back streaked 
with black, yellowish beneath ; chin and sides 
of the neck spotted with browns; three outer- 
most tail-feathers tipped with white. 5 inches 
long. , 
canadnsis, (northern fly-catcher,) cinereous, pale- 
yellow beneath ; lores yeilow ; crown spotted 
with black. 4 inches long. 
atra, (bee-catcher,) olive-ash ; breast cinereous ; 
belly whitish-yellow ; head, tail and quill- 
feathers black, the secondaries at the edge and 
outmost tail-feathers on the outer webs white. 
See MS. P. 
8—9. Mortitua. Spec. 38. 
europea, (wingless fly,) black ; thorax rufous ; 
segments of the abdomen with white margins. 
See MS. P. 
9—3. Mya. Spec. about 60. 
Remarks. ‘This genus and Mytilus have been 
cut up into several new genera. Unio is the prin- 
cipal genus taken from Mya. asmadonta, Mo- 
nodonta, &c. are proposed. But the unsettled. 
state of the numerous proposed subdivisions, even 
among some of the best zoologists of our times, 
demonstrates the absurdity oi the modern rage for 
innovation. Perhaps future naturalists will fix 
the boundaries of these subdivisions on definite 
