128 JOURNAL OF THE [October^ 



source of the material must in the future make Montgomery 

 widely known, as diatomists in all parts of the world will want 

 samples of it for their collections when its fame is spread abroad. 

 " Dr. Wilkerson, of this city, is the first person who has been 

 able to verify this discovery, as it was first viewed through the 

 microscope in his office. K. M. Cunningham." 



OBJECTS EXHIBITED. 



1. Eggs of Bot-fly on horse-hair : by H. W. Calef. 



2. A curious unknown, aquatic, hemipterous larva : by J. L. 

 Zabriskie. 



3. A bar of Flexible Sandstone from South Carolina : by 

 William G. De Witt. 



From the Society's Cabinet : 



4. Parasite of Barred Owl. 



5. Hairs of larva of Trogoderma ornata. 



6. Wing of Mosquito, Anopheles quadriviaculata. 



7. Spicules of Sponge, Myenia jiuviatilis. 



8. Parasite, eggs of parasite, and hairs of Monkey. 



Mr. De Witt donated his exhibit of Flexible Sandstone to the 

 Cabinet of the Society. ' 



Mr. Zabriskie said of his exhibit that it was captured on July 

 nth, 1890, in the stream of the Water Works, Flatbush, Long 

 Island. It was at first supposed to be a young larval form of 

 Gerris J but it is much more strange in general contour and in 

 curious additions to the appendages than any observed form of 

 Gerris. The color is a uniform black, excepting five whitish 

 spots, visible from above — one on the prothorax, two on the 

 outer posterior margins of the metathorax, and two including the 

 posterior coxae. It has large, four-jointed palpi, the first proxi^ 

 mal joint and the fourth joint bearing prongs, giving the appear- 

 ance of stag horns. When a palpus is deflected the prong of the 

 first joint apparently enters a cavity near the distal end of the 

 third joint, probably forming a prehensile organ. The beak is 

 short, stout, and reclined upon the sternum. The eyes are large 

 and globular. The anterior legs are short and robust. The 

 middle legs are much the longest, being equal to about two and 

 one-half times the entire length of the body from the vertex to 

 the anus. The femur of each middle leg is furnished through- 

 out nearly its entire length with a row of straight, prominent. 



