AMERK.'AN HEMirrEKA. 45 



couver Islasid and toward the south ranges to Fh)rid;i and Texas. 

 It niay be distinirtiished from xervuf<, its nearest ally, hv the incised 

 apex of the head and the narrower abdomen, which does not extend 

 beyond the sides of tlie elytra. 



EiiseliistuM servus Say. [Pentatoma spihfa \yt-stw. Hope Catalojtue, i, p. 

 42. 1837.) 



In the soutiieastern States tliis largely replaces the preceding 

 species. I have not seen it from north of New Jersey and Ohio or 

 west of Kansas, Texas and eastern New Mexico. I included this 

 species in my List of the Heniiptera of Buffalo, but on a closer ex- 

 amination am convinced that that specimen was a form of yj^-.^/ZiS 

 with the apex of the head scarcely incised. There certainly seems 

 to l)e a tendency in these two species to intergrade along the line 

 where their areas of distribution overlap. 



EiiNCliistiis impietivontriK Stal. 



The form I have identified as this species is closely allied to 

 sei'vus, but the pronotal angles are acutely produced. I possess a 

 single example taken at Las Cruces, New Mexico, by Prof. T. I). A. 

 Cockerell, and have seen another in the collection of Mr. Otto 

 Heidemann that was \a.\)e\\ed " Eusc/dstus proprms Uhler." The 

 species generally identified as inipic.tiventris Stal is smaller and more 

 depressed, having much tlie form of conspersus Uhler and inflaius 

 Van D., v.'ith the latter of which I have identified it as a variety or 

 race. It probably, however, should be considered a distinct species. 



EiiNChistiiS iiiflatuM Van Duzee. (Tiaus. Am. Ent. Soc, xxix, p. 107, 

 1903.) 



This is the Rocky Mountain or \vestern representative of servus. 

 It occurs from Colorado to New Mexico, and may be distinguished 

 from the eastern species by its broader and more depressed form, 

 the more rounded apex of the scutellum, the fewer punctures and 

 the ruf )us color beneath. 



A smaller variety or race of this species, of which I have speci- 

 mens from California and Idaho, has been determined by Dr. Uhler 

 as impidiventrii Stal. I do not, however, see how Stal's very short 

 and inadequate description can be construed to fit this species. 

 Comparing it with the form of tridigmuii with acute humeri, Stal 

 says tliat it is larger, which this is not, and that it has the same 



TRANS. AM. ENT. SOC. XXX. FEBKUARY. 1904. 



