36 JOURNAL OF THE [July, 



The larvae of this species live in the intestines of horses, pro- 

 ducing the disease called Bots (Harris). 



The female fly has a long and flexible ovipositor^ with which 

 she deposits her eggs upon the hairs of the fore legs of the 

 horse, while sustaining herself in the air by reduced motion of 

 the wings. The eggs are covered with glutinous matter causing 

 them to adhere to the hairs, and few are deposited out of the 

 reach of the mouth of the horse. 



8. Head of the Mosquito, with lancets. Showing five minute 

 stings (?), two of them barbed : exhibited by Chas. S. Shultz. 



9. Snail's Eggs. Young snail, within egg ; polarized : exhibi- 

 ted and explained by F. W. Devoe, 



10. Egg shells of the Vanessa Antiopa, Linn. : exhibited by 

 E. B. Grove. 



The Eggs of the Vanessa differ from those of other Lepidop- 

 terous insects, in having a much harder shell. 



Meeting of May 2oth, 1887. 



The President, the Rev. J. L. Zabriskie, in the chair. 



Seventeen persons present. 



The President announced the receipt of various Publications, 

 in exchange for the Journal of the Society. 



Messrs. James Walker and T. B. Briggs were elected Resi- 

 dent Members of the Society. 



The President presented to the Cabinet of the Society the 

 slide exhibited by him, displaying the three main sections — 

 transverse, radial and tangential — of the wood of the Black 

 Mangrove. 



PROGRAMME OF OBJECTS ANNOUNCED FOR EXHIBITION. 



1. Quill of Canada Porcupine {Erethizon dorsafus) : exhibited 

 and described by B. Braman. 



" The quills of the Canada Porcupine are from one inch to three 

 inches long. They are loosely attached to the skin, and are 

 barbed at the point. They easily penetrate the flesh of the ani- 

 mal which attacks it, strongly retain their hold, and tend con- 

 tinually to become more deeply inserted." 



2. Consecutive Sections through Head of Salamandra macu- 

 losa (larva) : exhibited and described by L. Riederer. 



