36 GEO. H. HORN, M. D. 



the hind angles slightly sinuate. The elytra may he described as black 

 with a yellow or luteous oblique stripe, widest at base, extending from 

 the humeri to the apices of the elytra. Vitfafm has the thorax gradu- 

 ally narrower from base to apex, feebly rounded on the sides and less 

 convex than in the preceding species, and much less broad proportion- 

 ately. The oblique stripe of the elytra does not attain the apex. The 

 thorax is colored similarly to hiuittatus, but the apical and basal re- 

 gions are not as distinctly blackened. Quadrinotatiis is the smallest 

 and most slender species. The thorax is similar in shape to hiviftatus 

 but entirely bronzed. The punctures of the elytra are proportionately 

 coarser. The oblique stripe is occasionally entire but not attaining 

 the apex, usually interrupted at middle, forming a humeral spot and a 

 stripe in the posterior third of the elytra. 

 E. elegans, Lee. (Limnius) Proc. Acad. 1852, p. 4.3. 



With this species commences a group having an elevated line ex- 

 tending from the basal line of the thorax to near the middle. Elejans 

 may be easily dibtinguished from any other of the group by its rather 

 more slender form and by its elytral ornamentation; the elytra are 

 black, slightly bronzed, with an oblique luteous band, starting at the 

 humerus, extending inward to the second interspace and along this in- 

 terspace to about the middle of the elytra ; another oblique band starts 

 from near the middle of the lateral margin, runs inward toward the 

 apex without attaining it. Length .11 — .12 inch; 3 mm. 



Occurs in Vermont. 

 E. fastiditus, Lee. {Limnius) Agass. Lake Superior, 217 ; Proc. Acad. 1852, 4.3. 



The sides of the thorax gradually converge and are scarcely rounded. 

 The form is more elongate and less convex than in ovalis, and the ely- 

 tral interspace more distinctly punctured. Color bronzed black, with 

 an entire oblique luteous stripe extending from the humerus nearly to 

 the apex. The suture is also luteous in many specimens. The legs 

 are black. Length .11 inch; 4 mm. 



Occurs in the Lake Superior region. 

 E. ovalis, Lee. (Limnius) New Species, 1863, p. 74. 



Similar in outline to the preceding but slightly broader, more con- 

 vex and shining and with the elytral interspaces scarcely punctured. 

 The sides of the thorax are distinctly rounded aud the disc more con- 

 vex. The oblique stripe seen m fastiditus is not entire in this species, 

 always interrupted at middle and much darker in color. Legs black. 

 It is similar in length to fastiditus. 



Occurs in South Eastern Pennsylvania. 



