198 
Grypotes unicolor Fitch.—But one specimen of this rather common 
species was taken, and as there were occasional weeds in the grass it 
may be considered doubtful whether it is to be included as a grass feeder. 
Agallia sanguineolenta Prov.cSeveral specimens of a species agreeing 
in most respects with this common form were secured. 
Of Fulgoride there wasa species closely resembling Delphax ornata 
and a species of Liburnia that occurred in considerable numbers, and 
besides these there were of the Homoptera a few Aphides, the species of 
which were not determined, as they probably all occurred on the weeds 
growing with the grass. 
Among the Heteroptera, Episcopus ornatus was fairly common, and a 
few specimens of Leptoterna amoena and a species of Geocoris were taken, 
as also a few examples of the carnivorous Coriseus ferus. 
Coleoptera were represented in considerable abundance, especially the 
little Flea-beetle, Chetocnema pulicaria, which appeared to rival the 
Cicadula 4-lineata in numbers. Several specimens of Systena teniata 
Say and Dibolia wrea were secured, and one specimen each of Haltica 
ignita, Diabrotica 12-punctata. Paria 6-notata, Coccinella 9-notata, and 
Centrinus scutellum-album, though of some of these, as for instance the 
Diabrotica 12-punctata, more specimens could have been secured if an 
efiort had been made. 
Meromiyza americana occurred in imago, and of course numerous other 
species of Diptera were present, as well as a number of species of Ich- 
neumonidz and other Hymenoptera and some Thripidz, but as special 
attention was not given to these no attempt will be made to present a 
full list here. 
The determinations of the Coleoptera were made by Mr. E. A. Schwarz. 
AN INTERESTING AQUATIC BUG. 
In October we received from the Rey. J. L. Zabriskie, of Flatbush, L. 
L., a sketch of an aquatic insect which puzzled us, for while it was evi- 
dently hexapodous, it was so unlike anything we had seen before that we 
could not very well place it. At our solicitation Mr. Zabriskie sent us 
the slide from which the drawing was made, when its true nature was 
at once apparent. the sketch having been misleading in lacking both 
the head and thoracic constrictions and in various minor details. Mr. 
Zabriskie has published a figure and description in the October number 
of the Journal of the New York Microscopical Society, but to put needed 
corrections on record we have had a more detailed figure made, and pub- 
lish it herewith. 
The insect is plainly a member of the family Hydrobatide, and comes 
closest to Metrobates, with many of the genera of which we are familiar. 
It is impossible to say whether it is an immature or an adult form; but 
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