1 882.] Entomology. 149 



Trinadad, is described in Nature. These queer creatures catch 



fish at night in a manner not very clearly made out. Dr. 



Kobelt, the malacologist, who has visited North Africa and Spain 

 to study the mollusks of the two countries reports, says Nature, 

 that it may be safely assumed that'the connection was not con- 

 fined to the Straits of Gibraltar, but extended at least as far as 



the meridian of Oran and Cartagena. M. Kunstler has found 



a flagellate Infusorian very much like Noctiluca living in fresh 



water. It appears that 38 naturalists worked at the Roscoff 



sea-side laboratory during 1 881 against 27 in 1880. The num- 

 ber of foreigners is eight. The French dredging expedition, in 



Le Travailleur, under the direction of A. Milne Edwards, has pub- 

 lished a preliminary report. Many crustaceans, and star-fish, 

 such as Brisinga, and other animals were found, these being 

 Atlantic forms new to the Mediterranean. " In general the Medi- 

 terranean is not to be thought a distinct geological province ; its 

 inhabitants have probably come from the ocean, and their devel- 

 opment and reproduction have been more active than in their 

 place of origin. Some have been slightly modified. The more 

 we get to know of oceanic productions off the coast of Portu- 

 gal, Spain, Morocco, and Senegal, the more do differences from 



Mediterranean animals disappear.' '(Nature .) A species of fluke 



1 Distomum cirrio-crum) have been found by G. Zaddach in the 

 crayfish, where they occur as blackish spots on the testes, and in 

 greater numbers in the muscles of the hinder part of the abdomen. 

 The author, says the Journal of the Royal Microscopical Society, 

 comes to the somewhat remarkable conclusion that in Distomum 

 tsostomum, another fluke of the crayfish, the sexually mature forms 

 succeed one another. 



ENTOMOLOGY. 1 



On Some Curious Methods of Pupation among the Chal- 

 cidid/e. — {Concluded from tin v ' ' .vV/'.' 1 — The mines of 



Lithocolictis jitchclla Clem., at Washington, contain oftentimes a 

 most interesting object, which I have never yet seen described. 

 Imagine a short, slender chain of small, closely welded brown 

 dipterous puparia and you will have the exact appearance. Such 

 a chain I have often found in the center of a mine of the Litho- 

 tolletis, supported by the silken threads which the larva of the 

 [atter always spins prior to pupation. The number of individuals 

 ] n a chain is always quite constant never varying more than from 

 ten to thirteen, and not a trace of any other occupant of the mine 

 is to be seen, no matter how careful the examination may be. 



Finding many specimens in the course of a winter I racked my 

 brains for a l< were. I had 



settled i 



my mind that they were dipt' 





