1012 



FAMILY LII. — CERAMBYCID.E. 



larly punctured. All the joints of bind tarsi densely pubescent beneatb, 

 witb a smootb median channel. Length 22— 17 mm. (Fig. 424.) 



Southern half of State; scarce. June 20-August 7. The fe- 

 males are always much larger than the males. The beetle is known 

 as the "Broad-necked Prionus" and the larvae are said to injure the 

 grape, apple, poplar and pine by boring into the roots. 



1877 (5960). Prionus poculabis Dalm., Schoenh. Syst. Ins., I, 1817, 148. 

 More slender and parallel and witb antennae more slender than in lati- 



collis. Dark reddish-brown, shining. Thorax narrower tban base of ely- 

 tra, the teeth never reflexed. Elytra with sides straight, almost parallel ; 

 surface more sparsely and much less roughly sculptured than in laticollis. 

 Length 25—15 mm. 



Lake County ; rare. June 20. Said to occur in the Middle and 

 Southern States. 



1878 (5962). Pbionus imbbicobnis Linn., Syst. Nat, XII, 1780, 622. 



Broad, stout. Dark reddish-brown, 



shining. Antennae 18-20- jointed, male; 

 16-18- jointed, female ; the joints of male 

 conical, each one hollowed to receive 

 tbe next and with the lower edge pro- 

 longed; those of female more slender 

 and simply serrate. Thorax very short 

 and broad, the hind tooth indistinct. 

 Elytra of female more convex than 

 male ; surface roughly and rather dense- 

 ly sculptured. Length 22-47 mm. (Fig. 

 125.) 



Knox and Crawford counties; 

 Fig. 425. Male. Natural size, scarce. July 4— July 9. Known as 



the "Tile-horned Prionus" on ac- 

 count of the joints of antennae overlapping like the tile of a roof. 

 The larva? infest the roots of the grape and pear and also feed upon 

 the roots of herbaceous plants. A member of the Austroriparian 

 fauna. 



III. Sphenostethus Hald. 1845. (Or., "wedge + breast. ") 

 Head small, much narrower than thorax; the latter larger, 

 trapezoidal, smooth ; presternum deeply emarginate behind for the 

 reception of the mesosternum. 



1879 (5968). Sphexostethus taslei Bug;., Ann. Fr.. 1841, 39. 

 Elongate, tapering behind. Black, feebly shining ; elytra often more or 



less reddish-brown. Antennae slender, about one-half length of body, slightly 

 compressed and serrate. Thorax narrower at apex, subconvex. obtusely 

 toothed near base, surface finely and sparsely punctate. Elytra tapering, 

 separated near apex, tips finely serrate; surface finely and rather sparsely 

 punctate. Length 27-29 mm. 



