938 General Notes. [Sento 7 
Entomologist for Aprilis one on “ the survival of the fittest ” among 
certain species of Pterostichus as deduced from their habits, in 
which Mr. J. Hamilton gives some facts bearing on the extinc- 
tion of species of these ground-beetles in the vicinity of large 
cities. Of the sixteen species mentioned four must soon become 
extinct, and six may possibly exist in the future as rarities, four 
will occur not uncommonly, while two (stygicus and lucublandus) 
will remain as now, common. Under the caption “ La feuille 
qui se transforme en insecte,” M. Preudhomme de Borre figures 
the larva of a singular mimetic form of Orthoptera (Cheradodis 
rhombicollis Latr.) from Quito, which is popularly supposed to 
change into a leaf——Zeitschrift für wissenschaftliche Zoologie, for 
June 27, contains a lengthy article, with numerous illustrations, 
on the adhesive apparatus on the tarsal joints of insects, by G. 
Simmermacher, to which we shall again refer. Mr. Hulst's 
monograph of the genus Catocala is apparently completed in the 
third number of the Bulletin of the Brooklyn Entomological 
Society. It contains a brief synopsis of the species, filling four 
closely printed pages ; then-follows synonyms and descriptions 
of the species, the latter rather too brief, but yet comparative. 
While the paper hardly fulfills the requirements of a monogra 
it is an excellent synopsis. In his “ Contributions a l'histoire 
des metamorphoses des Longicorns de la famille des Prionida, 
M. Aug. Lameere describes and figures the pupa of Parandra 
polita Say. A case of development of the imago in an ichneu- 
moned pupa is recorded in the Extomologists’ Monthly Magasin — 
for July, by A. F. Griffith, who, in a pupa of Tzeniocampa, found 1 
that “the moth had apparently died, as so often happens, when 
just ready for emergence, but within the body was a parasite — 
alive, also just ready to emerge.” | 
ZOOLOGY. 
By sectioning the cephalic segment of an Arenicola previously 
fixed by the injection of a solution of osmic acid of 0.50 pe cent, jl 
the auditory capsules were shown in some sections and eas!) | 
recognized by their little calcareous corpuscles. The otocystsaf — 
situated in the thickness of the integuments, far from the hypo- : 
dermis and in the midst of muscular bundles; they are fixed 9 
the connective envelope of these bundles, which surrounds them. : 
They are not in direct contact with the cesophageal commis ] 
but connected with them by several nerves. They are placed ih. 
wards the dorsal surface. ae 
The nerve fibers composing the commissure and the ba 
very fine and striated longitudinally. Nerve-cells exist through - 
out the length of the commissure, some in its interior, buta h | 
