fanuary 1S90.] 



PSYCHE. 



293 



past decade Is surprisingly little. Be- 

 sides the papers of Hagen and Kolbe on 

 the psocidae^ already alluded to, we 

 have only a description of an Embia by 

 Hagen, of three species of Nothrus by 

 Karsch, of two Bothrideres by Stein, 

 an account oi Elephantomyia by Osten 

 Sacken, and a generic list of hymenop- 

 tera by Brischke. Malfatti also de- 

 scribes two small insects from the 

 Sicilian amber. A meagre showing 

 indeed when the collections of un- 

 worked material are known to be so 

 extensive. I have also noted but a 

 single paper on the insects found in the 

 recent gum copal, a description of two 

 or three species by Qiiedenfeldt. 



Here may fairly be mentioned a paper 

 or two on recent insects which throw 

 light on the structure of extinct types. 

 One of these is the recent notice by de 

 Selvs Longchamps of the Japanese 

 dragonfly, Palaeophlebia^ which he 

 makes the type of a new legion, to 

 which he refers also HeteropJilebia and 

 other forms from the secondary rocks 

 of England and Bavaria, and the ter- 

 tiary deposits of the Rhine. In the 

 other, on the post-embryonic develop- 

 ment of yiilus^ Heathcote points out 

 that the relations of the dorsal and ven- 

 tral regions of the body of the young 

 yulus correspond exactly with their 

 permanent condition in Euphoberia. 

 a carboniferous myriopod ; and he fur- 

 ther holds that the traces of the division 

 of the dorsal plates found in the arcJii- 

 polypoda lend additional strength to the 

 belief that they are composed in modern 

 diplopods of two fused segments origi- 



nally distinct ; which the doubling of 

 the internal organs and of the meso- 

 blastic segmentation also indicates. 



Among the new tertiary fields which 

 have been opened, and which have 

 given rise to some of these researches, 

 and to others upon which I must not 

 touch, are Felek in Hungary by Staub 

 and others, Kutschlin, Bohemia, by 

 Deichmiiller, and various localities in 

 upper Alsatia by Foerster, in the last of 

 which about a hundred species have 

 already been found, though none have 

 yet been worked up. Peat beds have 

 also begun to be sounded, and notes of 

 their contents have been made by Friih, 

 Geinitz, and Hollingworth, while simi- 

 larly recent deposits have yielded a little 

 to Brongniart, Kendall, and Sordelli. 

 Wilkinson and Woodard have also 

 shown us that insects mav be expected 

 from the tertiaries of Australia. To some 

 places in our countrv I will refer later. 



The more general diftusion of knowl- 

 edge regarding fossil insects has been 

 marked tluring the past decade. Im- 

 portant new discoveries have found their 

 way into journals and into papers before 

 scientific bodies, to such a degree that 

 it is hard for the bibliographer to keep 

 track of them. But besides these we 

 have had very full analyses of the larger 

 papers, among which those given by de 

 Borre to the Belgian entomological 

 society easily hold the first place. Bib- 

 liographies, like those of Malfatti and 

 mv own, annual reviews of the litera- 

 ture, . like those given by Bertkau, 

 Trouessart, Dalton, White, Marcou and 

 others ; general compilations of col- 



