IIKMIPTKKA HETKKOPTKRA I'KXTATOMII >.K. 435 



dently tapers and is roundly pointed in front, the thorax narrows gently 

 from behind forward, and is nearlv as long as broad : the sciitelluin is 

 rather small, triangular, the apex bent at a right angle and rounded. The 

 abdomen is ovate, twin- as long as broad. The specie.- i- marked with 

 round, dark spots, about O.'J""" in diameter, on either side, one at the outer 

 edge of the front of each abdominal segment, and one in the middle of either 

 transverse half of the thorax, a little removed from the outer border: the 

 anterior ones half-way between the border and the middle line. The whole 

 surface appears to be very minutely granulated. The tegmina can not be 

 seen. 



Length of body, :>./>"""; breadth of thorax, 1.4"""; of abdomen, l.ii.Y 

 From its form I formerly referred the insect doubtfully to Reduvius, 

 but its size alone would preclude such a reference. 



Green River, Wyoming. Two specimens, Nos. !t and 96 6 (F. ('. A 

 Richardson), 4070 (S. H. Scudder). 



Family PENTATOMID^: Stephens. 



This family has always held the first place among lleteroptera in Ter- 

 tiarv deposits, but with the publication of this volume its place is disputed 

 by the Lyg;eida-. This is due not only, though principally, to the excep- 

 tional abundance of the Lygseidae at Florissant, but also to the rather meaner 

 proportion of the Pentatomida, as will appear below. In Kuropean deposits 

 only a single species is known from amber, while fifty have Keen exhumed 

 from the rock deposits. They represent only four of the nine subfamilies, 

 and the great majority belong to the two subfamilies < 'vdnida and Penta- 

 tomida, the former with sixteen species referred to four genera, the latter 

 with twenu -live species referred to six genera Tl ther subfamilies rep- 

 resented are the Scutelleriua with live species of two genera. Pachvcoris 

 and Tetyra, both at < teningen, and the Acaiithosomina with four specie- ,,f 

 t\\o genera. . \canthosoma and PhloBOCOris, both at b'adolioj Besides these 

 a Pentaloma i- reported fivm (Jreeuland and a ( '\ duns from Ne\v South 

 \\'ales. The American forms here brought to notice represent onl\ the sub- 

 families ( '\ dnida and Pentatomida, but in re \ erse proportion to what appear- 

 in Knrope. the ('vdnida being very well represented by twenty-four species 

 of six genera, nearh all of them 1>\ a numlier of individuals, and one li\- a 

 great man\, the Pentatomida on the contrary l>\ only thirteen species of 



