McAtee—Key to Nearctic Geiicra and Species of Geororinse. 129 
Isthmocoris imperialis J)istiint. 
Geocoris imperialis Distant, Biolojiia Centrali-Americana Rliyncliota 
Hemiptera—Pleteroptera I, pp. 197-cS, 1S82, Dl. xviii, tig. 18. [Duenas, 
Guatemala] .* 
Scutellum, adjacent parts of pronotum and under surface, except of 
head, piceous; liemelytra straw color; front and lateral margins of pro¬ 
notum, head and legs chiefly yellowish; these parts and hemelytrasome¬ 
times much iufuscated. Length 3.5 to 4 mm. 
Specimens in the collections examined were obtained at Bayou Sara, 
Louisiana, San Antonio, Texas, and Los Angeles and San Bernardino, 
California. The species was described from Duenas, Guatemala. Mr. 
H. G. Barberf reported the species as new to our fauna, on the basis of 
a specimen collected in the vicinity of Brownsville, Texas, in 1903 or 
1904. It is interesting to note, therefore, that the specimens from the 
first two localities cited above were collected by Mr. E. A. Schwarz in 
January, 1879, and December, 1878, respectively. 
Isthmocoris piceus Say. 
Saida picea Say, Descriptions of new species of Heteropterous Hemiptei'a 
of Nortli America, New Harmony, Indiana, Dec., 1831, p. 18. t Com¬ 
plete writings of Thomas Say on the entomology of North America, 
Vol. I, 1859, p. 336. [Massachusetts.] 
Scutellum, pronotum and under surface, except of head, piceous; heme¬ 
lytra fuscous to piceous; head and legs chiefly yellowish. Most of tlie 
specimens examined are brachypterous, and in these the clavus and 
corium are fused, the claval suture being nearly or quite obsolete. Length 
3.25 to 4 mm. 
Specimens examined are from Andover, Massachusetts; Portland, Con¬ 
necticut; New York, Pennsylvania, and Colorado. 
Geocoris trislis Stab (Nya hemiptera, Ofversigt af Kongl. [Svenska] 
Vetenskaps Akademiens Forhandlingar, 11, No. 8, 1854, p. 236 [Cali¬ 
fornia] ; Hemiptera, species novas descripsit. Kongliga Svenska Fregatten 
Eugenies Kesa. Zoology I Insecta, 1859, p. 249 [San Francisco, Califor¬ 
nia]) probably is a synonym of one or the other of the above species. 
This question can not be definitely settled, however, without study of 
Stal’s material. Judging from the known ranges of piceus and imperialis, 
the latter is most likely prove a synonym of trislis. 
In case Stal’s name is found to api)ly it will, under the law of priority, 
have precedence. This result would be but another instance among a 
great many in which the current name of a species is based upon non¬ 
typical specimens from an outlying part of the range. The name trislis 
’References are given in full the first time cited, and abbreviated therealter. 
t Bull. Brooklyn Museum, Vol. I, No. 9, Oct., 1906, p. 275. 
t Pagination of this paper according to Banks, N. t.'atalogue of the Nearctic 
Heiniptera-IIeteroptera. 1910, p. 69. 
