Goleopterological Notices, VII. 363 



dant and widel}^ distributed species in the regions bordering the 

 Pacific Ocean. 



EIJCOIVNUS Thorns. 



This genus, in the sense here understood, is by no means so 

 abundant in species in North America as in Europe, and is even 

 more obviousl}" resolvable into homogeneous groups, based upon 

 important differences of special structure or general habitus. In 

 fact these groups are so isolated among themselves as to warrant 

 distinctive appellations, as will be noted in the table below. The 

 common distinguishing features of all the groups are an exserted 

 head, with anterior eyes and an oblong prothorax, narrowed more 

 or less at base and at least bifoveate near the basal margin. In 

 the form and structure of the head it is similar to Connophron, 

 but in the form and sculpture of the prothorax it is radically dif- 

 ferent. In the pubescence of the head and body it differs greatly 

 from Connophron, except in the subgenus Scopophus, which 

 possesses the peculiar stiff" and posterioi'ly directed vestiture of 

 the occipital parts, so peculiarlj^ distinctive of Connophron, but 

 the thoracic structure is still purely that of Euconnus. 



As in Connophron, the antennae may have either a 4 or3-jointed 

 club, and the hind coxae vary even more in degree of separation, 

 this being virtually fixed, however, within the limits of each sub- 

 genus. The elytra mutuall}^ overlap for a short transverse dis- 

 tance and are independently rounded at apex, as in Connophron 

 and other related genera, and the scutellum is wholly invisible as 

 usual in this part of the family. 



All the subgenera appear to be equally widely distributed over 

 nearly the same territorial area, but no species is at present 

 known from the Pacific coast, and this is a somewhat remarkable 

 fact. But it should also be noted that the genus is more varied 

 structurally in the United States than in Europe, for Connophron, 

 Drastophus, Pycnophus and Noctophus, besides the subgenera 

 named below, all belong to the Euconnus type, as shown by 

 general constitution, and especially by elj'^tral, cephalic and an- 

 tennal structure, and it is therefore probable that this tj'pe origi- 

 nated in North America and migrated to Europe in somewhat re- 

 mote geologic time by wa}^ of Greenland, Either this, or else 

 there are peculiar and inexplicable reasons for the early extinction 

 of all species except Drastophus Isemcollis in the Pacific coast 

 regions, and the latter is a less likelj^ supposition. 



