198 



Grypotes unicolor Fitch. — But one specimeu 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. — Several specimens of a species agTeeiug 

 in most respects with this common form were secured. 



Of FulgoridiB there was a 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 si)ecies of 

 which were not. determined, as they probably all occurred on the weeds 

 growing with the grass. 



Among the Heteroptera, Episcopus ornafm was fairly common, and a 

 few specimens oi Leptoierna amoena and a species of Geocoris were taken, 

 as also a few examples of the carnivorous Coriscus ferns. 



Coleoptera were represented in considerable abundance, especially the 

 little Flea-beetle, Chwtocnema puUcaria, which ajipeared to rival the 

 Cicadula 4-lineata in numbers. Several specimens of Systena tceniata 

 Say and Diholia rvrea were secured, and one specimen each of Haltica 

 iynita, Biabrotica 12-pimctat<i., Paria (i-notatay Goccinella 9-7iotata, and 

 Centrinus scutellum-album, though of some of these, as for instance the 

 Djahrotica 13-punctata, more specimens could have been seciu'ed if an' 

 eifort had been made. 



Meromyza americana occurred in imago, and of course numerous other 

 species of Diptera were present, as well as a number of species of Ich- 

 neumonidie and other Hymenoptera and some Thripidae, 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 Rev. J. L. Zabriskie, of Flatbush, L. 

 I., a sketch of an aquatic insect which j)uzzled us, for while it was evi- 

 dently hexapodous, it was so unlike anything we had seen before that we 

 could not A^ery well place it. At our sohcitation 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 Yorl- 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 Hydrobatidse, 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 



