UHLER ON INSECTS. 411 



with brown; and the margins of the nieta-pleura more widely white; 

 antennae sometimes whitish. 



Length to tip of venter 3-4 millimeters. ^Yidth of base of pronotum 

 1-1^ millimeters. 



I collected a few specimens in Clear Creek CaGon, August 3, in warm, 

 sunny spots in the dark sand. 



Subfamily PACHYGRONTHIN^E. 



(Edancala Amyot et Serv. 

 0. dorsaUs. 



Pamera dorsalis Say, Heteropt. New Harmony, 17, No. 8. 

 (Edancala dorsilinea Amyot et Serv., Hemipt., 258, pi. 12, fig. 6. 



Found in the valley of the Arkansas near CaQon City. It seems to 

 be rare there, unless the season was too far advanced for its appearance. 

 On the eastern side of the continent, it appears to be single-brooded, 

 and is rarely found later than in the early part of summer. 



Subfamily MYODOCHIN^. 



Ptochiomera Say. 

 P.puhenila. 



Plociomera puherula Stal, Enum. Hemipt., iv, 1-53, No. 8. 



One specimen from near Denver, August 8. 



LiaYROCOEIS Stal. 

 L. sylvestris. 



Cimex sylvesfiis Linn., Fauna Suec, 256. 



Plociomerus diffusiis Uhler, Proceed. Boston Soc. Nat. Hist., 1871, p. 9. 



Pamera contracta Say, Heteropt. New Harmony, 16, No. 2. 



One specimen from near Manitou, August 15. Although usually com- 

 mon in the places which it frequents, I was disappointed in failing to 

 find more than this single specimen. It occurs under such varied cli- 

 mate and physical conditions as to make it a good subject for study in 

 determining the kind and amount of change brought about in this type 

 of structure by such influences. In Europe, it is found, in its more 

 northern range, in Sweden and Finland, and, in its central and southern 

 range, in Austria, Central Germany, Switzerland, and France. Thus, as 

 in Xorth America, it extends over several degrees of latitude, including 

 varieties of altitude, and accordingly being subjected to contrasting 

 conditions of climate and temperature. 



Myodocha Latr. 

 M. serripes. 



Myodochus serripes Oliv., Encyc. MdtborL, viii, p. 106. 

 Myodocha peUolata Say, Heteropt. New Harmouy, 19. 



One specimen from the valley of the Arkansas River, east of Canon 

 City, August 11. These insects are usually abundant in the places 

 which they select, and although I met with many spots which in the 

 15 H B 



