37G TEKTIAKY INSECJTS OF NOKTH AMBliKJA. 



In our own Tertiaries I have i-eferred all the species to the modern genera 

 Lygajus (three) and Nysius (five), the former beli)nging to the division 

 Lyga^aria, the latter to the Orsillaria. The resemblance between the Ter- 

 tiary Lygaeina of Europe and America is therefore not very strong. 



LYG^US P^abricius. 



This old genus having given birth to the family name, a considerable 

 number of fossils have been referred to it. Nine liave been described, one 

 each from Aix and Krottensee, two each from Oeningen and Sieblos, and 

 three from Radoboj ; Serres also refers to four, and Curtis to one, species of 

 the genus at Aix, and Berendt and Gravenhorst credit the genus to amber. 

 Three of these unnamed forms, however, are compared to certain living 

 species, which show that they can not belong here, and the species from 

 Krottensee, L. mutilus, is certainly not a Lygpeus, so that only ten or 

 eleven species at the most, named and unnamed, can be claimed for the 

 European Tertiaries. In America we have three, all found at Florissant. 



Table of the species of Lijgcrus. 



Anterior separated from posterior lobe of thorax by a distiact though fiue tuberciilate ridge. 



1. L. atahiUtus. 

 Anterior and posterior lobes not distinctly separated. 



Thorax distinctly though sparsely punctured 2. i. obsolescens. 



Thorax smooth 3. L.fwculeiitiia. 



1. LyG^US STABILITUS. 



PI. 22, Fig. 10; PI. 24, Fig. 16. 



Head strongly but roundly produced in front of the pretty large eyes, 

 the surface finely rugulose, uniform black-brown, the antennae uniformly 

 fuscous. Thorax witli ampliated lateral margins, which are finely mar- 

 ginate, the front margin considerably, regularly, and roundly emarginate ; 

 surface of posterior lobe coarsely, faintly, and distantly punctate, of anterior 

 much like the head, the two separated by a slight indented carina, giving 

 it a tuberculate appearance ; the anterior lobe is dark like the head, the 

 posterior paler but obscurely so ; the scutellum in color and surface struct- 

 ure is like the head. The hemelytra are dark obscure, with a broad faint 

 band crossing them when closed just beyond the tip of the scutellum, very 

 much as in Dysdercus cinctus of the same beds, which but for the presence 

 of ocelli this species greatly resembles. 



