OP PHILADELPHIA. 197 



It is rather rare. The trivial name, applied by Mr. Knoch, is 

 pre-occupied in this genus. 



[A species of Toxotus, afterwards described as T. dives New- 

 man ; a variety of it is T. atratus Hald. — Lec] 



3. L. BicoLOR. — Rufous, sericeous ; elytra black. 

 Inhabits the United States. 



Le])tura hicolor Melsh. Catal. 



Body elongated, pale rufous, sericeous : head with an obsolete, 

 impressed line : antennae as long as the body: thorax conical; 

 posterior angles acute : elytra black, attenuated ; with numerous 

 short, prostrate, black hairs ; tip very obliquely emarginate, ap- 

 pearing mucronate : wings black. 



Length from half an inch to three-fifths. 



This species is found in Pennsylvania, and on the Ohio and 

 Mississippi rivers. It may be allied to the L. hicolor of Swede- 

 rus in Stockholm Trans. 1817, p. 197, but his insect is said to be 

 black on the upper part of the tail, a character which our insect 

 does not possess. In Turton's translation of the Syst. Nat., the 

 name hicolor of Swederus is changed to hicolorata, so that Mr. 

 Melsheimer's designation may be retained for the species here 

 described. 



4. L. RUBRICA. — Black ; elytra and abdomen rufous. 

 Inhabits the United States. 



Leptura ruhrica Knoch in Melsh. Catal. 



Body black, punctured, with numerous short hairs above, and 

 sericeous beneath : head obsoletely punctured : antennae as long 

 as the body; [419] six terminal joints fulvous at base : thorax 

 confluently punctured ; punctures dilated ; a transverse groove 

 on the hind margin : scutel small, black : elytra rufous or dull 

 brick red ; punctures numerous, becoming smaller to the tip, 

 which is emarginate, mutic : beneath black: abdomen rufous; of 

 the female, black. 



Length about half an inch. 



This insect occurs on the Missouri. It is found in Pennsyl- 

 vania, but I have not frequently observed it. 



5. L. 8-NOTATA. — Black, hairy ; elytra each four-spotted. 

 Inhabits Mississippi. 



Body deep black, with upright hairs : head rather large, with 

 1824.] 



