84 FAMILY IV. — CYDNID.E. 



its apex very broadly rounded ; cheeks flat, equalling tylus, 

 their margins broadly reflexed, the submargins with numerous 

 erect teeth and longer bristles ; antennae with second joint 

 slender, 3 — 5 stouter, subequal ; beak reaching or slightly sur- 

 passing middle coxae, its basal joint as long as or slightly long- 

 er than bucculae, second and third joints subequal, fourth short- 

 er ; pronotum subquadrate, but little wider than long, its sides 

 feebly curved in front of middle, front margin deeply concave, 

 without an antemarginal impressed line ; subbasal transverse 

 impression very faint, with a single very irregular row of punc- 

 tures; scutellum triangular, strongly tapering, longer than 

 wide, slightly contracted opposite apex of clavus, the tip nar- 

 rowly rounded ; corium with hind margin truncate, the outer 

 apical angle slightly prolonged ; membrane feebly surpassing 

 abdomen, its veins distinct, simple ; osteole reaching middle of 

 metasternal plate, its opening minute, extended as a flattened 

 oblique plate ; front tibiae fossorial, armed with numerous 

 stout spines. 



Besides the species separated above under Cydnus, five others 

 are recognized by Van Duzee from North America, two of 

 which occur in the eastern states. 



KEY TO EASTERN SPECIES OF .ETHUS. 



a. Second joint of antennae more slender and nearly one-half longer 

 than third, fourth and fifth joints subequal; beak slightly sur- 

 passing middle coxae. 45. communis. 

 aa. Second joint of antennae shorter than third, fifth joint longer than 

 fourth; beak just reaching middle coxae. 46. indentatus. 



45 (50). jEthus communis Uhler, 1877, 379. 



Elongate-oval, subdepressed, all the margins ciliate. Piceous-black, 

 shining, tibiae dark reddish-brown, antennae and tarsi paler. Head wider 

 across the eyes than long, its apex very broadly rounded; cheeks slightly 

 convex, smooth or nearly so, each with a bristle-bearing fovea near eye 

 and another near apical fourth of tylus, the submargin of each also with 

 10 — 12 short erect acute bristle-like teeth and four or five much longer 

 bristles. Pronotum about one-fourth wider than long, its sides curving 

 from apical third to the obtusely rounded front angles; disk smooth ex- 

 cept for a few rather coarse punctures along the front edge and behind 

 the front angles, the vague transverse subbasal impression with a very 

 irregular row of similar punctures. Scutellum very sparsely and coarsely 

 punctate, the convex basal portion and flattened tip almost smooth. Ely- 

 tra rather coarsely and evenly, not closely punctate, the apical third of 

 corium much more sparsely so; costal border with six to eight coarse setae- 



