REVIEWS AND BOOK NOTICES. 497 
larged seventeen diams.) as seen in the last stage just before it 
changes to the “megalops” stage (Fig. 90, enlarged thirteen 
diams.), 
We shall look forward with much interest to the next year’s 
report on the work done by the Fish Commission on the coast of 
Fig. 84. 
Lerneonema. 
ba 
Euchone., 
Maine, preliminary notices of which have already appeared in the 
“ American Journal of Science,” the “ Proceedings of the Ameri- 
can Association ” and this journal. 
— AMERICAN Frres.*—The long expected third volume of 
k series (the fourth was issued in 1869) has at length appeared. 
— elaborate monographs of two families of diptera en- 
‘—1. The family of Ortalide; 2. Review of the North 
American Trypetina. 
> the Ortalide are treated in the most exhaustive manner and 
views about their classification, given in a long introductory 
“umg oa th 
Monogra of the Diptera of = fee, Volume poeta prepared for the Smith- 
: ss iin, by H. Loew, Washi prr 
