HEMIPTEKA— HETEliOPTEKA— PENTATOMID^. 435 



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

 from behind forward, and is nearly as long as broad ; the scutellum is 

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

 abdomen is ovate, twice as long as broad. The species is marked with 

 i-ound, dark spots, about O.^""™ 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, 5.5'""; breadth of thorax, 1.4"""; of abdomen, 1.65""". 



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

 but its size alone would preclude such a reference. 



Green River, W}-oming. Two specimens, Nos. 9" and 96*" (F. C. A. 

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



Family PENTATOMID^C Stephens. 



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

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

 by the Lygjrida\ This is due not oidy, though principally, to the excep- 

 tional abundance of the Lyg^eidaj at Florissant, but also to the rather meager 

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

 only a single species is known from amber, while fiftv liave been exhumed 

 from the rock deposits. They represent onl}- four of the nine subfamilies, 

 and the great majority belong to the two subfamilies Cydnida and Penta- 

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

 with twenty-five species referred to six genera The other subfamilies rep- 

 resented are the Scutellerina with five species of two genera, Pachycoris 

 and Tet)'ra, both at Oeningen, and the Acanthosomina with four species of 

 two genera, Acanthosoma and Phkx'ocoris, both at Radoboj. Besides these 

 a Pentatoma is reported from Greenland and a Cydnus from New South 

 Wales. The American forms here brought to notice represent only the sub- 

 families Cydnida and Pentatomida, but in reverse proportion to what appears 

 in Europe, the Cydnida l)eiug very well represented by twenty-four species 

 of six genera, nearly all of them bv a number of individuals, and one by a 

 great many, the Pentatomida on the contrary b}' only thirteen species of 



