DUUING THE RECENT AECTIC EXPEDIIION. 



119 



tioii and figures. The species has been already recorded as a 

 parasite on this and allied birds. 



NiRMTJS PH^oifOTus, Nitzsch. 



Three examples on Flialaropus lobatus, from lat. 82° 30', agree 

 well with the description and figures ; but the group of species 

 to which it belongs appear to be especially parasitic on Gulls 

 and Terns*. 



COLPOCEPHALUM, Sp. ? 



One example on Strejjsilas interpres, from lat. 81° 44', 17th 

 Aug. 1876 (Feilden). 



Meistopoit gonophjeum, Burmeister, var. ? 



Many examples on Corvus cor ax ^ from Dobbin Bay, 29th Aug. 

 1876 {Feilden). These do not altogether agree with the figure 

 and description in Giebel's ' Insecta Epizoa ;' yet I know not to 

 what else to refer them. Neither do they agree with Denny's 

 figure of Colpocephalum subcBquale, which Giebel says is not Bur- 

 meister's species of that name, and should be transferred to JMe- 

 nopon. As the Eaven remains, as it were, isolated all the year in 

 these high latitudes, it is quite reasonable to suppose that it may 

 there possess a special parasite. 



I do not regard my determinations of the Mallophaga as satis- 

 factory ; and it is desirable that they be hereafter reviewed by a 

 specialist, which we now have not in this country. 



COLLEMBOLA. 

 IsoTOMA Besselsii, Fachard ? 



Three examples from Eloeberg Beach, July 1876 {Feilden), 

 mounted on a slide, may perhaps belong to the above species, 

 diagnosed by Packard (Amer. Naturalist, xi. p. 52) from Polaris 

 Bay. 



PoDrsA HTPEEBOEEA, BoJieman. 



Several examples from lat. 82° 29', found on the surface of the 

 snow at an elevation of 800 feet {Feilden), appear to agree suffi- 

 ciently with the description of this species, noticed from Spitz - 

 bergen. 



LiPUEA, sp. ? 



Two individuals (mounted on a slide) from lat. 82° 30', June 

 6th, 1876 {Feilden), appear to pertain to this genus. They are 



* Three examples of a Lipeurus were found on Procellaria glacialis from 

 Baffin Bay {Feilden) ; in &11 probability an undescribed species. 



