Occasional Papers of the Museum of Zoology 19 



Catalogue. Dr. Knight writes me that these are the first 

 specimens he has seen which have been taken in any locahty 

 outside of Colorado. 



Plagiognathns spp. — Two other species of this genus appear 

 to be represented by a single specimen each. One is from 

 Fargo, the other from the Turtle Mountains. 



'^Chlamydahts associatits (Uhler). — Specimens were taken 

 at Amidon and at Fargo. ( Determined by Knight. ) 



Gerridak 



*Gerris marginatus Say. — Five specimens were collected on 

 the Sheyenne River near Warwick. August 8. 



*GeJ'ris biienoi Kirkaldy. — Five individuals were taken with 

 the preceding, and eleven were secured from a small fresh- 

 water pond near Stump Lake. 



Lhnnoporus rufoscuteilatiis (Latreille). — -The collection 

 contains nine individuals, taken on a small spring-fed brook 

 near Stump Lake. Uhler (1878, p. 508) reports this species 

 from Pembina. 



Mesoveliadae 

 *Mesoi'el{a iiutlsanti White. — Three specimens are at hand. 

 One was taken on a small pasture pond near Devils Lake, 

 July 20, and the others were found at Stump Lake. July 24. 



Saudidae 

 ^Salda coriacca Uhler. — The collection contains ten speci- 

 mens of this species. Seven are from Odessa Narrows at 

 Devils Lake, where they occurred on the margin of a small 

 pond. One was taken at Stump Lake, from marshy ground 

 by a brook. One was found in a slough in the Turtle Moun- 

 tains ; and the tenth is from the Sheyenne River. 



