1876..] 41 [Osten Sacken. 



pressed, constricted in the middle, beyond incurved, expanded, 

 especially above, the posterior edge much compressed, convex in the 

 middle half. Length of body, d", 28.5 mm., ?, 36 mm.; of antennas, 

 cf, 15 mm., ?, 14.5 mm.; of tegmina, cf, 17 mm., ?, 18.5 mm.; of 

 hind femora, cf, 17 mm., ?, 21 mm. 

 Georgia. 



Repobt on the Dipteea beought Home by De. Bessels 

 feom the aectic voyage of the " polaeis," ik 1872. 

 By C. R. Osten Sacken. 



The small collection of Diptera from Polaris Bay sent to me for 

 examination, consisted: 



A. Of seven vials of alcoholic specimens, containing: 



1. Chironomus, numerous specimens of a small species. 



2. Scatella, a species with the hyaline dots on the wings 

 arranged like the North American S. favillacea Lw., or the 

 European sorbillans Hal., but different from both. 



3. 4, 5. Several specimens of Anthomyia, undistinguishable. 



6. Puparium of a Muscid. 



7. Larva of a Tipulid. 



B. Of bottles 8 and 9, without alcohol, containing well preserved 

 specimens of the Tipulse, to be described below, one in each; also a 

 specimen of Trichocera (regelationis?). 



C. A few pinned specimens of the same Tipulce, one species of 

 Anthomyia and one Lucilia. 



The Diptera from Greenland have been described several times ; by 

 O. Fabricius in the last century, by Staeger, Curtis, Zetterstedt and 

 Loew in the present one. Schiodte, in his chapter on the Arthropoda 

 of Greenland (in Rink's work) , compiled nearly all that was known 

 on the subject. Still the collection before me, small as it is, affords 

 an exceptional interest on account of the very high latitude where it 

 was formed. 



The most interesting specimens in this collection are the two Tip- 

 ulce, the more so as they are represented in several well preserved 

 examples. The pinned specimens of Anthomyia and Lucilia, as 

 well as the above mentioned Scatella, in order to be determined 

 specifically, should be compared with European specimens which 

 are not within my reach. The alcoholic specimens cannot well be 

 determined beyond the genus. 



