Horn.] ZJo [June 20, 



Closely resembles parallelus, but is narrower and slightly more convex. 

 Occurs with the parallelus. 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. Propygidium and pygi- 

 dium coarsely and sparsely punctured. Mesosternal stria entire. 

 Anterior tibiae quadridentate, middle 4-, posterior 2-spinous. Length 

 .14 inch ; 3.5 mm. 



More robust than the preceding species, and differing more by its gen- 

 eral 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 punctiger, but more robust. Pygidium 

 and propygidium more sparsely punctured, the former nearly smooth at 

 apex. Mesosternal stria broadly interrupted at middle. Middle and 

 hind tibi;e 3-spinous. Length .16 inch ; 4 mm. 



Occurs in Ohio. 



i Sub-genus Gylistix. 



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

 margin. Anterior tibiae 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 tibiae with two teeth at middle cylindricus. 



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. 289, pi. 7, fig. 1 ; Lac. Atlas, 

 pi. 17, fig. 2 ; ? 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 trian- 

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

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

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

 and pygidium with very coarse and sparsely placed punctures. Anterior 

 tibiae 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. 



