Occasional Papers of tJie Muscitui of Zoology 21 



Corixidae 



Cymatla americana Hussey. — A number of the paratypes of 

 this species were taken by Crystal Thompson while making 

 plankton collections in Fort Totten Lake, August 7, 1919. 

 They have already been recorded elsewhere (Hussey, 1920, 

 p. 80). 



Arctocorisa spp. Several species of this genus were taken 

 at Devils Lake and in the Turtle Mountains. They had best 

 be left unnamed at present. 



Corixa spp. The remarks in connection with the preceding 

 genus may be applied here also. 



The following species, not mentioned above, are recorded 

 from "Dakota" in the literature, but I have not found any 

 records for them from definite localities in North Dakota. 

 Many or all of them may be expected to occur within the state. 



Homaemiis bijugis Uhl. — Uhler, 1876. p. 272. 



Corimelaena extensa Uhl. — Uhler, 1872, p. 193; 1876, p. 271. 



Mormidea htgens (Fabr.). — Uhler, 1876, p. 285. 



Euschistus servus (Say).— Uhler, 1876, p. 286. This record requires 

 confirmation. 



Hymenarcys nervosa (Say). — Uhler, 1876, p. 287. 

 Hymenarcys aequalis (Say). — Van Duzee, 1917, p. 46. I have been 

 unable to find any other Dakota record. 



Aelia americana Dall. — Uhler, 1876, p. 284. 



Neottiglossa trilineata Kirby. — Uhler, 1877, p. 401. 



Thyanta custator (Fabr.). — Uhler, 1876, p. 290. 



Thyanta rugitlosa (Say). — Uhler, 1876, p. 290. 



Banasa dimidiata (Say). — Van Duzee, 1904, p. 60. 



Perilhis cxaptiis (Say). — Uhler, 1876, p. 281. 



Podisus modestus Dall. — Uhler, 1876, p. 283. 



Calorhiniha mendica Stal. — Uhler, 1876, p. 292. 



Stachiocnemus apicalis (Dall.). — Uhler, 1877, p. 402. 



Aufeius impressicollis Stal. — Uhler, 1876, p. 300. 



Coriztis hyalinus (Fabr.).— Uhler, 1876, p. 300. 



Coricus viridicatus Uhler.— Uhler, 1877, p. 404; Horvath, 1908, p. 566. 



