Horn.] ZJO [June 20, 



Closely resembles parallelus, but is narrower and sli<,4itly more convex. 

 Occurs with the paralUlus. I have also seen a specimen from Canada. 



H. punctiger, Lee. Proc. Acad., 1861, p. 343. 



Thorax minutely punctulate on the disc, more coarsely punctured at 

 apex and at the sides. Elytra with four entire dorsals, a trace of hume- 

 ral, fifth extending to middle, sutural longer. Proi)ygidium and pygi- 

 dium coarsely and sparsely punctured. Mesosternal stria entire. 

 Anterior tibiae quadridentate, middle 4-, posterior 2-sj)inous. Length 

 .14 inch ; 3.5 mm. 



More robust than the preceding species, an(J differing more by its gen- 

 ei'al aspect than by any well defined characters. 



Occurs in California, Oregon and Nevada. 



H. basalis, Lee. Proc. Acad., 1861, p. 343, note. 



Closely allied in sculpture to j)i<?ic</^e/', but more robust. Pygidium 

 and propygidium more sparsely punctured, the former nearly smooth at 

 apex. Mesosternal stria broadly interrupted at middle. Middle and 

 hind tibiixj 3-spinous. Length .16 inch ; 4 mm. 



Occurs in Ohio. 



Sub-genus Cylistix. 



Thorax with inner stria absent, outer stria entire and close to the 

 margin. Anterior tibife with small dentiform process on the inner edge 

 near the base. Prosternum convex, with a marginal stria continuing 

 around the apex. Mandibles moderately prominent. Form cylindrical, 

 elongate. 



Marginal stria of prosternal lobe entire. Sutural stria 

 entire. 



Hind tibije with two teeth at middle cylindricns. 



Hind tibiae with one tooth at middle attenuatus. 



Marginal stria of prosternal lobe broadly interrupted. 



Fifth dorsal and sutural stria? abbreviated at base gracilis. 



H. cylindricus, Payk. Mon., p. 91, pi. 10, fig. 5 ; Lee. Bost. Journ. 

 v., p. 42, pi. 1, fig. 8 ; Mars. Mon., 1853, p. 389, pi. 7, fig. 1 ; Lac. Atlas, 

 1>1. 17, fig. 3 ; ? cylindricus, Beauv. Ins., p. 178, pi. 6, b, fig. 1. 



Elongate, cylindrical, black, shining. Legs reddish-brown. Head 

 sparsely punctured, clypeus concave, the concavity extending in ti'ian- 

 gular form on the front. Thorax quadrate, sparsely punctured with 

 moderate and fine punctures intermixed. Elytra with four entire striae, 

 fifth extending from apex to basal fourth, sutural entire. Propygidium 

 and pygidium with very coarse and sparsely placed punctures. Anterior 

 tibia} 4-, middle 4-, posterior 3-dentate. Length .18 inch ; 4.5 mm. 



Occurs from Massachusetts to Texas, not common. 



H. attenuatus, Lee. Bost. Journ. V., p. 42, pi. 1, fig. 9 ; ? elongatus, 

 Beauv. Ins., p. 178, pi. 6, b, fig. 2. 



