HEMIPTEUA— HETEROPTERA— PENTATOMIDJi;. 437 



referred to two distinct genera, Cydnopsis with eleven species from Oenin- 

 gen, Radoboj, and Aix, and Neurocoris with two from Radoboj. Cydnus 

 is represented by a species at Oeningen and another at Aix, and Brachy- 

 pelta one at Krottensee. Neither of these extinct generic types occurs in 

 our Tertiaries, where this subfamily is far more prolihc tlian in Europe and 

 far surpasses the Pentatomida. With the exception of a couple of forms, 

 represented each by a single specimen, and which are referred to modern 

 types, Cyrtomenus and Discostoma, all the others are remarkable for differ- 

 ing apparently from nearly all living types and also from the known fossils 

 in the short and accurately triangular scutellum, agreeing in this respect with 

 the Florissant Pentatomida, and, as there, necessitating the establishment of 

 several new generic groups. These, however, are more prolific in species, 

 and the species in individuals, than is the case with the Pentatomida. 



Tuhle of the i/tnera of Cydnida. 



Body less than 10 millimeters long. 



Scutellum triaugular, not produced at the apex, as broad as lon^. 



Head deeply sunk in the thorax, the depth of the emarginatiou of the thorax embracing it being 

 nearly or quite half its width. 



Body more than twice as long as broad 1. Stetiopdla. 



Body less than twice as long as broad 2. I'roci/diiiiK. 



Head sunk but little in the thorax, almost wholly free. 



Anterior lateral angles of the thorax rounded, so that the head projects but little beyond 



the general curve of the body 3. Necrocijdniis. 



Anterior lateral augles of the thorax prominent, the head out of direct relation to the curve 



of the body 4. TliJibomenus. 



Scutellum produced into a lobe at apex, distinctly longer than broad .'). Ci/rlomeiiiis. 



Body more than 15 millimeters long 6. Uiscosloma. 



1. STENOPELTA gen. nov. (gtevc'?, TriXrtj). 



Body more than twice as long as broad, the sides nearly parallel, with 

 broadly rounded ends, the anterior curve broken by the head, one-half of 

 which is advanced beyond its outline, the other half sunken in the thorax, 

 which is deeply emarginate to receive it; the eyes, which are moderately 

 large, globular, and central, are thus brought to the edge of the thorax ; in 

 front of the eyes the head is rounded with a slight angulation, the whole 

 nearly circular ; the ocelh are large and situated behind and within the 

 eyes. Thorax subquadrangular, about twice as broad as long, the anterior 

 lateral angles prominent Ijut rounded, the basal margin truncate. Scutellum 

 moderate, triangular, with perfectly straight sides, nearly half as broad 

 again as long, reaching less than a third way to the tip of the abdomtMi. 



