LIST OF np:MIPTERA-HETEROPTERA OF LAS VE(;AS 

 HOr SPRLNGS, NEW MEXICO, (COLLECTED BY MESSRS. 

 E. A. SCHWARZ AND HERI^ERT S. BARBER. 



By PiiTLir R. Uhler, 



Provdd (if the J'lahodi/ Institute, Bdlthnorc, Mfirylaml. 



This small but instructive collection, now in the United States 

 National Museum, from a restricted locality' hitherto neglected adds 

 another link in the chain of evidence explaining the (ecology and 

 sources of distribution of a considerable numl>er of local and widely 

 dispersed forms of Hemiptera. 1 am informed b}' Mr. E. A. Schwarz 

 that all specimens were collected in the vicinity of the Montezuma 

 Hotel, which is situated at the mouth of the (lallinas River can3^on, 

 at an altitude of 6,7T0 feet. 



Viewing- the materials here presented, I am impressed by the mixed 

 character of the collection. In the genus Homa^mus are the ]Mexican 

 upland II. jyroteus Stal, and the Rocky Mountain If. InjuglK Uhler. 

 Coi'imeJaena is represented by onh' the far western (\ exteroid I^hler. 

 Two species of Ihdlsus appear, the P. cyu!cus Say, an Alleghanian 

 form, and the Canadian C. hractecdus Fitch, which by the aid of a 

 larger series of recently collected specimens seems to ))e a sutficientl}'' 

 distinct species. The interesting genus DciKlrocm'h is signalized by 

 the presence of the Californian-desert species, I), frutlcos^is Bergroth, 

 and by the eastern D. Iniiiiti'dlis Uhler. 



The collection when broadly considered, is seen to consist of widely 

 distributed Rocky Mountain forms with a mixture of some far western 

 and a few eastern species. The usual number of North American 

 genera appear here as is generally the case in western collections, but 

 the aquatic, riparian, and hypogean forms are scarcely represented. 



Family PACHYCORID.E. 



HOMiEMUS PROTEUS Stal. 

 Homa'mwi proteus StAl, Stett. Ent. Zeit., XXIII, 18(52, p. .S2. 

 A common insect in man}- parts of eastern Mexico, extending over 

 the t)()undary into Texas and Arizona, and now for the tirst time found 

 at Las Vegas Hot S])rings, New Mexico. August (Ml The writer 

 has examined, also, specimens from the vicinity of Matamoras, from 

 Tepic in southwestern Mexico, and from the vicinity of Cape St. Lucas, 

 Lower California. It is everywhere exceptionally variable, both in 

 form and pattern of markings. 



Proceedings U. S. National Museum, Vol. XXVII— No. 1360. 



849 



