578 PHYSIOLOGY. 



fluid resin in their excursions. I have also observed in the Greifswald 

 collection a peculiar form of ant, which I consider new, as it appears 

 to be no longer existing, at least I know no allied form among the 

 still living ones. 



Amber Lepidoptera are amongst the greatest rarities. I have never 

 seen one yet. Berendt mentions a large Sphinx in his collection, and 

 several caterpillars, which also have never occurred to me. 



The Diptera, on the contrary, are extremely numerous, and, indeed, 

 of all the families. Berendt mentions amber Tabani and Bombylii, none 

 of which have I seen ; whereas in the Berlin collection there is an 

 Anthrax of the size of our A. semiatra. Besides, I there saw two of 

 the genus Leptis, not dissimilar in size and tigure to the L. aurain, 

 several Ernpes, and several species of the genus Tachydromia. Besides, 

 there are in both collections innumerable small Muscaria, and, among 

 the larger ones, species of the genera Musca, Anthomya, Scatophaga, 

 &c. I observed a great number of individuals of the family Dolicho- 

 podea, and, among them, the genera Dolichopux, Medeterus, Porpkyrops, 

 and Rhaphlum. Diptera with multiarticulate antennae are even 

 more numerous, especially the Bolitophagi. I found species of Bole- 

 tophila, Mycetophila, Leia, and Sciara, frequently perfect, and with 

 all their colours preserved. I think I have also observed Bibios. 

 True Tipulas are more rarely seen, but I detected one resembling the 

 T. pratensis, several Limnobice, some small, like L. pulchella, and 

 others larger. There is also an abundance of gnats, particularly 

 species of Psyckoda, Lasioptera, Cecidomya, Ceraiopogon, even some 

 Tanypus or Chironomus, but a true Culex I have never discovered. 



Next to these the Nenroptera are probably the most numerous. 

 Berendt possesses the larva of a Myrmecoleon. I myself have seen 

 but a small Hemerobius, like H. hirtus or fuscatus, a Semblis about 

 the size of 8. marginala, as well as a larva of this family, which is the 

 more remarkable, as they all live in water ; and innumerable Phryganete 

 of various sizes. 



Among the Dicli/otoptera I observed two individuals of the genus 

 Ephemera in the Berlin collection, as well as two specimens of 

 Machilis pclypoda. According to Berendt, Libellulce are also found 

 in amber. The most numerous of this order are the Termites in both 

 collections. I saw several pieces completely filled with them. The 

 winged ones as well as unwinged larvae and neuters with large heads 

 ' are found in it. Germar's Hemerobius antiquus is a true Termites, which 



