274 ENTOMOLOGICAL NEWS [xxxii, '21 



de Beauvois' species. It also seems to be R. nigra H. S., ac- 

 cording to the head structure. This species is separable from 

 all the other United States forms known to me by having a 

 profoundly unisulcatc prosternum. This note complies with the 

 requests of my correspondents to rectify the matter. The syn- 

 onymy and distribution of Ranatra fusca, R. kirkaldvi and R. 

 nigra, as given by Montandon and Van Duzee, are incorrect and 

 will require careful study to straighten out finally. 



Gelastccoris oculatus Fabr. This species is another new Kansan 

 record, and is likewise authentic. T can find no difference between 

 the two specimens before me from Cherokee County, Kansas, Aug., 

 1920 (Hungerford and Beamer), and specimens of the typical form 

 from Washington, D. C. 



Gerris (Aquarius) orba Stal. Bluff, Utah. (R. C. Moore). A 

 new record for the State. 



Gerris (Tenagogonus) hesione Kirkaldy. Cherokee County, Kan- 

 sas, Aug., 1920. (Hungerford and Beamer). This delicate little 

 gerricl is a first record from Kansas, which is the farthest western 

 [.out from which the species is known; the other two states in which 

 it 1 as been found are Florida and Ohio. 



Microvelia circumcincta Champ. Ardmore, Okla. (R. C. Moore). 

 This is a most interesting record. The species was described by 

 Champion from Guatemala. I took it in Tamaulipas, in Northern 

 Mexico, and have seen it from Texas. These are all new distribu- 

 tional records. 



Rhagovelia dJstincta Champ. Yampa R., N. W. Colorado (R. C. 

 Moore). This is another of Champion's Central American species, 

 now positively recorded from the United States. Walker (Catalogue > 

 records the species from "Ind.," .so noted by Van Dnzee (Catalogue). 

 Trepobatopsis trux n. sp. 



I fend: Broader (including eyes), and longer than prothorax ; tumid 

 and as long as broad between the eyes. Eyes moderately large, quite 

 oblique, shorter axis (breadth), four-fifths of the longer. Three large 

 black shining setigerous loci in a line near each eye. Antennae slender 

 (first two joints only present in type) ; basal joint curved at base; sec- 

 ond joint one- fourth length of first, slightly enlarged at tip. Ro.-trum 

 short, stout, 3 (?) visible joints covered with long silvery grey hairs. 

 Thorax: All three thoracic segments distinct dorsally. Fnnwtnin 

 about three times as wide as long, narrower than head with eyes, set 

 in a deep emargination in mesonotum. Prosternum with deep acetabula 

 under eyes for anterior coxae. Mesonotum twice as wide as long, 

 divided medially by a deep longitudinal linear suture ; anteriorly deeply 

 roundedly emarginate to receive the pronotum ; posteriorly sinuate. 

 Mesopleurac extended backward to level of posterior margin of meta- 



