96 



In experimenting with rubber corks, the smaller and less tapering cori 

 were found to be best, and rubber ropes valueless.] ■ 



Proceedings of the Club. 



§ 4. Mimetic Resemblences between Diptera and 

 Hymenoptera. Baron Osten-Sacken exhibited a number 

 of specimens of Diptera and Hymenoptera to illustrate the 

 mimicry which obtains in certain cases. The instances 

 selected were Laphria and Bombus ; Systropus and Ammo- 

 phila ; Ceria and Ancistrocera ; Ceria and Polistes ; Ceria and 

 Conops (both Diptera); Spilomyia and Vespa. He further 

 remarked that there is a great resemblance between ffispa 

 suturalis and Capsus robiniae, a beetle and a bug frequenting 

 the leaves of the locust-tree. (Mar. 13, 1874-') 



§ 5. Capture of rare Pseudoneuroptera and Neu- 

 roptera. Dr. Hagen said that many rare species of Pseu- 

 doneuroptera and Neuroptera had been collected this year, 

 some by himself in Massachusetts, and some by Mr. Sanborn 

 in Kentucky. Amongst these are Calopteryx angustipennis 

 and Petalura Thoreyi. The two other species of Petalufa 

 known belong to New Holland. This genus is so exceptional 

 that the first specimen of the American species was declared 

 by Selys to be of necessity Australian and erroneously labelled. 

 Some larva? from the same locality and collector probably 

 belong to Petalura. By the dilated antennae they agree with 

 the larva of Hagenius. Two Aeschna furcillata were caught 

 in Manchester, Mass. Only one specimen is known to exist in 

 Europe. A specimen of Neuronia partialis was also captured. 

 The only nearly related species live in Japan, the northern 

 part of Europe and in Siberia. They have the peculiarity to 

 fly very high ; this specimen was taken on top of a stage-coach. 

 Dr. Hagen farther obtained a Hemerobid of the genus Dila 

 from Kentucky : the male with pectinated antennae, the female 

 with a long ovipositor like that of Rhaphidia. Two species are 

 known from Europe and two from Asia, viz : one from Ceylon 

 and one from India. ( Oct. 9, 18740 



No. 15 was issued July 7, 1875. 



