198 ACADEMY OF NATURAL SCIENCES 



an impressed, longitudinal line : antennae not longer than the 

 body : thorax subcylindric : elytra polished ; each elytron with 

 four subtriangular, equidistant, yellow spots ; the basal one at 

 the base, and the terminal one near the tip ; hair near the tip 

 shorter, and nearly prostrate ; tip truncate, mutic : posterior feet, 

 with the base and tarsi, yellowish. 



Length less than half an inch. 



But a single specimen of this species was taken by Mr. Nut- 

 tall on the Mississippi. 



[Afterwards described as L. stictica Newman, and L. ^■'jmnc- 

 tata Hald. — Leg.] 



6. L. LUGUBRIS. — Black; sericeous beneath; antennae shorter 

 than the body. 



Inhabits Lower Missouri. 



L. scuteUum-alhum ? Knoch in Melsh. Catal. [420] 



Body deep black, immaculate, with short, prostrate hairs above, 

 and yellowish-sericeous ones beneath : head with an elevated line 

 between the antennse : antennae rather shorter than the body : 

 thorax conical ; posterior margin grooved ; posterior angles acute : 

 scutel with yellow hair: elytra attenuated; tip obliquely truncate, 

 subemarginate; the external angle acute and prominent, the inner 

 one rounded. 



Length rather more than two-fifths of an inch. 



Two specimens of this species were taken by Mr. T. Nuttall 

 on the banks of the lower part of the Missouri. 



7. L. PROXIMA. — Black; elytra testaceous, with a black tip. 

 Inhabits Missouri. 



Body deep black, hairy : antennae nearly as long as the body : 

 thorax rounded or subovate ; a transverse groove on the posterior 

 margin, and an impressed line on the anterior margin : elytra 

 testaceous, with very short, yellowish hairs ; tip black, truncate 

 on the edge : beneath, with long hair on the pectus, and short 

 hair a little sericeous on the postpectus and venter : tail entire. 



Length less than three-fifths of an inch. 



Var. a. Elytra testaceous, destitute of the black tip. 



I have not seen this insect in Pennsylvania. It seems to be 

 very closely allied to L. tomcntosa Fab., but is larger, more 

 robust, and the tail is not [421] emarginate as that of tomcntosa. 



[Vol. in. 



